The letter on a Spanish energy certificate is the shortest available summary of what a property will cost you to live in. It is arranged and paid for by the seller, it runs from A to G, and behind it sit two numbers: how much energy the building needs per square metre per year, and how much CO₂ that produces. A class B new build and a class F resale of the same size on the same coast are not two versions of the same purchase — the running costs, the mortgage terms and the renovation bill are all different.
This guide covers what the certificate actually measures, why new builds and older properties sit at opposite ends of the scale, what Spanish law really requires if you intend to sell or let a low-rated home, what Spain has decided to do about the European targets and what it pays owners to do instead, what the document costs, and how the requirements are scheduled to tighten between now and 2050.
Disclaimer. This guide is general background as of September 2026, not legal, tax or technical advice. Energy certification is national law (Real Decreto 390/2021), but registration, fees, deadlines and enforcement are handled by each autonomous community and change from year to year — as does the certificate model itself, which is being replaced at the end of September 2026. Ratings are a moving target too: a certificate can be re-issued after works, and a property advertised today may carry a letter that is later updated. Prices quoted for the certificate are market observations, not regulated tariffs. For any specific property, the registered certificate is the only authoritative document, and decisions around it belong with your Spanish lawyer, gestor or certifying technician.
What the energy certificate is
The full name is Certificado de Eficiencia Energética — CEE. It is a technical report produced by a qualified professional (an architect, technical architect or engineer) who inspects the property and records its surface area, orientation, construction, windows, insulation, heating, cooling and hot-water systems, then runs those inputs through officially recognised software.
The report is registered with the energy registry of the autonomous community where the property sits — Generalitat Valenciana for the Costa Blanca, Junta de Andalucía for the Costa del Sol, Govern de les Illes Balears for Mallorca. An unregistered certificate has no legal value. That is the single most common defect a buyer's lawyer finds: the owner has a PDF from a technician, but it was never lodged with the region, so as far as the notary — and, since August 2025, the mortgage valuer — is concerned, it does not exist.
What comes back from the registry is a registration number and the energy label: the coloured A-to-G strip you see on listings.
What the letter actually tells you
The certificate rates the building, not the household. It answers one question: how much bought-in energy does this property need to keep a standard family comfortable through a standard year? Two numbers carry the answer, and each gets its own letter:
- Non-renewable primary energy consumption, in kWh per m² per year — how much energy the building has to buy in. This is the figure that maps to your bills.
- CO₂ emissions, in kg of CO₂ per m² per year — the climate footprint of that consumption.
The two can diverge. A house heated by an efficient heat pump on a renewable tariff scores better on emissions than on consumption; an old gas or diesel boiler does the opposite. Since 2021 the certificate also reports heating and cooling demand separately, which matters on the Mediterranean coast, where cooling — not heating — drives the summer bill.
Translated into practice, the letter tells you four things before you have seen a single utility bill:
| What the letter signals | Why it matters to a buyer |
|---|---|
| Running cost | The gap between a class B and a class F home of the same size is a multiple, not a percentage, on the heating and cooling part of the electricity bill |
| Comfort in the extremes | An F or G property is the one that is cold in January and expensive to cool in August — the two weeks a year that decide whether you use the house off-season |
| Work still to do | The certificate's recommendations page lists the improvements a technician thinks the property needs and the class each would reach — effectively a free renovation brief |
| Financing | Spanish banks discount green mortgages for class A and B; and since August 2025 no mortgage valuation can be issued at all without a valid, registered certificate |
A concrete comparison. Take two 100 m² apartments a kilometre apart on the Costa Blanca: a 2023 new build rated B, and a 1988 resale rated F. Both are pleasant in May. The difference shows up in the twelve weeks of the year when the air conditioning or the heating is running most of the day — and over a decade of ownership, on a property used year-round, that difference is typically worth more than the cost of replacing the windows in the older one. The letter is not an abstract score; it is a forecast of a recurring bill.
What the letters A to G mean
| Class | What it means in practice | Typical Spanish property |
|---|---|---|
| A | Very low demand: strong insulation, high-performance glazing, aerothermal or heat-pump systems, usually solar panels | New build completed under the 2019 energy code; around 1% of the national stock |
| B | Efficient. What most coastal developers deliver today | Off-plan and key-ready developments from 2020 onwards |
| C | Above average. Usually a 2007–2018 building, or an older one properly renovated | Post-2007 resale; refurbished villa with new windows and a heat pump |
| D | Average for a modern-ish Spanish building. Comfortable, but climate control is visible in the bills | 2000s urbanisations |
| E | Below average. Thin or no insulation, early double glazing, split air-conditioning as the only climate system | The most common class on the coast — 1980s–1990s bungalows and apartments |
| F | Poor. Cold rooms in January, heavy air-conditioning use in August | 1970s–1980s blocks, older village houses |
| G | The worst band. Certificate valid five years only, not ten | Pre-1980 property with no upgrades; also holiday homes never adapted for winter use |
Figures commonly published for existing homes put class A under roughly 45 kWh per m² per year and class G above roughly 380. Treat those as a rough sense of scale rather than thresholds — the actual boundaries are set per climate zone and building type, for the reason in the next section.
The letter is relative, not absolute
Spanish energy classes are not fixed thresholds applied nationwide. Each property is compared against a reference building of the same type in the same climate zone, and Spain runs from mild Mediterranean coastal zones to cold continental ones. The same villa, built identically, scores differently in Alicante than in Burgos.
The practical consequence: an E on the Costa Blanca and an E in Madrid are not the same building. On the coast the heating season is short, so a property earns less credit for not having a heating problem — it is being judged against neighbours with the same advantage. Compare properties within the same province, and read the kWh figure, not only the letter.
New builds and older properties: why the gap is so wide
Roughly eight out of ten Spanish homes are rated E, F or G. Published figures vary with the sample — IDAE puts around 80% of certificates registered since 2013 at class E or worse, while sector studies run as high as 87%, with E alone accounting for more than half. Class A sits at about 1% or less either way. That is chronology, not workmanship. Spain's building rules tightened in three steps, and a property's letter is largely decided by which side of those steps it was built on.
| Built | Rules in force | Typical class today |
|---|---|---|
| Before 1979 | No thermal standard at all | G, sometimes F |
| 1979–2006 | NBE-CT-79 — first insulation requirements, minimal by modern standards | E or F |
| 2007–2019 | Código Técnico de la Edificación (2006), tightened progressively | D or C |
| 2020 onwards | CTE with the 2019 energy chapter (DB-HE) — near-zero-energy building standard | A or B |
What pushes an older coastal property down the scale
- No wall or roof insulation in most pre-2007 construction — the single biggest factor
- Aluminium window frames without a thermal break, often single glazed
- Electric-only climate control: a split unit for cooling, a portable heater for the cold weeks, both counted as non-renewable primary energy
- No renewable generation — no solar panels, no aerothermal system, nothing offsetting demand
What a new build has instead
- A continuous insulated envelope and thermal-break glazing as standard
- Aerothermal heat pumps for heating, cooling and hot water in one system
- Controlled ventilation and, increasingly, solar panels — which the EU calendar makes standard on new homes before the end of the decade
- A design calculated against the standard, not retrofitted to it — which is why almost everything delivered on the Costa Blanca, Costa del Sol and Mallorca since 2020 lands in A or B
New build: the letter comes in two stages
Off-plan buyers should know what the letter in the brochure actually is. Spanish new-build certification happens twice:
- Design-stage certificate (certificado del proyecto) — calculated from the architect's plans and specified systems, before anything is built. This is the rating quoted in off-plan marketing: a projection, not a measurement of a finished building.
- Completed-works certificate (certificado de obra terminada) — issued once the building is finished, reflecting what was actually installed, and registered with the autonomous community. This is the official one, and it belongs in the handover pack alongside the declaración de obra nueva and the first-occupancy licence.
The two normally match, because the developer has to build what the project specified to obtain the first-occupancy licence. They can differ when systems change during construction — a different heat pump, added solar, revised glazing — and the final letter can move either way. So an off-plan property advertised as class A is advertised in good faith on the design rating; the definitive letter exists only after completion. Ask for the registered completed-works certificate at handover and check it against what you were shown. Our guide to buying new build property in Spain covers the full document list.
The same logic applies in reverse to resales. A certificate is a snapshot of the property on the day it was assessed: an owner who installs aerothermal heating or replaces the windows can have it re-issued, which is why a listing letter sometimes improves between the day a property comes to market and the day it sells.
An E or F property is not a bad purchase. It is a purchase with a known, priced piece of work attached. New windows and a modern heat pump typically move a coastal property up two classes, the certificate itself names the measures, and the works qualify for income tax relief of 20–60% — see below. What matters is that the work is priced before you agree a price, not after.
The rules in Spain today
Certification is governed by Real Decreto 390/2021, in force since 3 June 2021.
| Situation | Requirement |
|---|---|
| Selling | A copy of the registered certificate and label is annexed to the contract and handed to the buyer (art. 17.2) |
| Letting | A copy of the label plus the usage recommendations goes to the tenant |
| Validity | Ten years from registration; five years for class G (art. 13.1) |
| Who pays | The owner — the seller in a sale, the landlord in a rental |
| Registration | With the autonomous community, within one month of issue |
| Mortgage valuation | Since 12 August 2025 (Orden ECM/599/2025) no valuation valid for mortgage purposes can be issued without a current, registered certificate — no exceptions |
That last line is the one that turns the certificate from the seller's paperwork into the buyer's problem. If you are financing the purchase, a missing or expired certificate stops the valuation, and the valuation is what the bank lends against. For a completed building the valuer needs the certificate duly registered; for a property still under construction, the certificate plus a copy of the registration application is accepted, provided the data on the two match. It is worth confirming the certificate exists and is registered before you go far into a mortgage application — see our guide to mortgages in Spain for foreigners.
Fines fall on the owner, not the buyer. Failing to obtain the certificate, failing to register it, or entering false data are administrative offences under Ley 8/2013, graded in three bands: €300–600 for minor, €601–1,000 for serious and €1,001–6,000 for very serious breaches. In practice the more common outcome is a stalled completion rather than a fine.
What is exempt
Article 3.2 lists the exclusions. The ones a buyer meets in practice:
- Free-standing buildings under 50 m²
- Listed and protected buildings, where compliance would alter their character
- Temporary structures with a planned use of two years or less
- Industrial, workshop and agricultural buildings with low energy demand
- Buildings bought for demolition or major reconstruction
Renting out a low-rated property: what Spanish law actually says
This is where the noise is loudest, so it is worth separating what is true today from what is being predicted.
Long-term letting: no minimum class anywhere in Spain
For a long-term residential tenancy there is no minimum energy class in Spain, in any region. A property rated G can be let exactly like a property rated A. National law requires only that a valid, registered certificate exists and that the tenant receives a copy of the label and the usage recommendations. Nothing in the housing law ties the letter to the right to let.
Holiday letting: two regions do impose a minimum class
Here the picture is different, and it is the part most often reported wrongly. Tourism is regional competence in Spain, and two communities have written a minimum energy rating into the conditions a holiday rental must meet. This is a licensing requirement, not a certification one — it sits in tourism law, not in Real Decreto 390/2021.
| Region | Minimum class for holiday letting | Since |
|---|---|---|
| Illes Balears (Mallorca, Ibiza, Menorca) | Class F for buildings finished before 31 December 2007, class D for buildings from 1 January 2008. Failure to hold it can mean cancellation of the entry in the tourist registry, and with it the right to let | Introduced by Ley 6/2017 amending the Balearic tourism act; the adaptation period ended 31 July 2020 |
| Canarias | Class F pre-2007 and class D from 2007, alongside renewable hot water (70% for older buildings, 90% for newer), cooling equipment rated A, and a 35 m² minimum — reducible to 25 m² where the property compensates with features such as a class A or B rating | Ley 6/2025, in force 13 December 2025, with a five-year transition for existing lets — longer on the smaller islands |
| Comunitat Valenciana (Costa Blanca) | No minimum class. The registration file does require a declaration that the property has an energy certificate | Decreto 10/2021, as amended by Decreto Ley 9/2024 |
| Andalucía (Costa del Sol) | No minimum class. Requirements cover surface, bathrooms, ventilation, heating and cooling — not the letter | Decreto 31/2024 |
| Región de Murcia (Costa Cálida) | No minimum class. Certificate required under the national rule, as everywhere | Decreto 269/2019 |
If you are buying on Mallorca to let short-term, this is a live condition, not a future one. The Balearic rule has been enforceable since 2020, and a property that cannot reach class F — D if it was finished from 2008 — is not a compliant holiday rental. Check the registered certificate before you buy, not after. A second Balearic deadline runs alongside it: under the 2022 circular-economy law, thermal installations running on fuel oil or diesel had to be removed from tourist accommodation by 1 May 2026.
Two further points on holiday lets:
- The four-month loophole is gone. Under the old 2013 rules, property used less than four months a year was exempt from certification. Real Decreto 390/2021 removed that exemption and brought tourist-use dwellings explicitly into scope.
- The class is never the main gate. Even in the Balearics and the Canaries, what usually decides whether a holiday let is possible at all is the regional licence, any local moratorium, and the community of owners: since 3 April 2025, under article 17.12 of the horizontal property act as amended by Ley Orgánica 1/2025, a new tourist let in an apartment block requires the community's express approval by a three-fifths double majority, though lets already licensed and operating are not affected. The energy letter is one condition among several — see our guide to renting out property in Spain.
The headline you have probably read: "from 2030 you cannot sell or rent below class E"
It circulates in every language, and it is wrong. It describes the European Commission's 2021 draft of the buildings directive, which proposed minimum classes of E by 2030 and D by 2033 for housing. That provision did not survive the negotiation and is not in the text adopted in April 2024.
The Commission's own representation in Spain published a correction on 21 October 2025 under the headline "Will the EU prohibit selling or renting homes with low energy labels?" — its answer was that the claim is erroneous, that the directive sets no minimum performance standards for housing, and that it restricts neither sale nor rental. Binding minimum standards exist only for non-residential buildings: the worst-performing 16% must be renovated by 2030 and 26% by 2033, which matters if you are buying commercial premises, not a home.
What Spain has actually decided
Spain's answer to the directive is the Plan Nacional de Renovación de Edificios. The draft went through public consultation from 28 November to 13 December 2025, was sent to Brussels on 30 December 2025, and the final version is due to take effect on 31 December 2026. What it contains:
- A consumption target, not a class threshold: cutting residential energy use by 25% by 2030 and 33% by 2035 — stiffer than the 16% and 20–22% the EU asks for — and zero emissions across the stock by 2050. In volume terms the government puts that at the deep renovation of roughly 1.57 million dwellings between 2020 and 2030.
- Priority to the worst 43% of buildings, which is where the grants will be pointed. On the Mediterranean coast, that is a large share of pre-2007 stock.
- Renovation passports — a staged upgrade plan for an individual building, to be offered alongside the certificate.
- Minimum standards only for the tertiary sector (offices and similar), with 2030 and 2033 milestones. Nothing comparable for housing.
There is no minimum class for selling or letting a home anywhere in the plan — though note that this is the national level, and two regions have already gone further for holiday lets, as set out above. Spain also has room to avoid a national threshold: the government reported residential energy consumption already down about 10% between 2020 and 2023, and expects to exceed the EU targets on that trajectory. A ban would be politically expensive and, on those numbers, unnecessary.
Where the alarming 2026 headlines come from. Several outlets ran versions of "the government will go house by house — it will be compulsory in order to sell or rent". That is the renovation plan rewritten as a prohibition. The plan is about diagnosis, renovation passports, grants and financing; it contains no sale or rental restriction. Russian-language sites have gone further still, claiming Spain will restrict sales below class E from 2027 — that appears in no Spanish legal text at all.
What Spain does instead: money
The Spanish instrument is subsidy and tax relief, and both are tied to the certificate.
- Renovation grants scale with the saving achieved. For whole-building retrofits, aid has run at around 40% of cost where the saving is 30–45%, rising to roughly 65–80% for deeper savings, with caps per dwelling. Works on a single dwelling attract a smaller grant — broadly 40% of cost with a cap in the low thousands — and, importantly, that line is restricted to habitual residences, which excludes holiday homes.
- The Next Generation window is closing and regional calls have been shutting through 2026. The successor framework is the Plan Estatal de Vivienda 2026–2030 (Real Decreto 326/2026, in force 24 April 2026), whose third chapter funds rehabilitation, accessibility and urban renewal, delivered through the autonomous communities. Terms vary by region and by call, and the calls open and close.
- Income tax deductions of 20%, 40% and 60% for energy-improvement works, covered in detail below, all conditioned on a certificate issued before and after the works.
- Municipal property tax rebates. Many town halls discount the annual IBI for efficient homes — commonly around 50% for class A and 25% for class B, typically for three to five years, and often a separate rebate for solar panels or aerothermal systems. This is set by each municipality's tax ordinance, not nationally, so it has to be checked at the town hall for the specific address.
- Landlord relief: long-term landlords can reduce taxable rental income by 50% to 90% under the 2023 housing law, and the 60% band applies where qualifying rehabilitation was completed in the two years before the contract. Whether a specific energy retrofit meets that definition is a question for a Spanish asesor fiscal.
The pattern is consistent: Spain pays owners to improve properties rather than barring them from using them. For a buyer looking at a class F resale, that is the practical framing — the upgrade has a public co-payment attached, provided the property qualifies, and the certificate is the document that unlocks it.
And the one country that did try a ban
France is the example everyone cites. Under its own 2021 climate law a home below a performance threshold is not legally "decent" and cannot be let: class G has been barred from new lettings since 1 January 2025, with F due in 2028 and E in 2034. Those rules are still in force — but France is unwinding them. From 1 January 2026 the coefficient applied to electricity in the French rating was cut from 2.3 to 1.9, lifting many electrically heated homes a class without any works; and in June 2026 the government presented a bill to return some 700,000 F- and G-rated homes to the rental market under a commitment to renovate within three to five years. The country that tried prohibition is retreating from it, and Spain never adopted it in the first place.
How the requirements tighten, year by year
Spain: the dates that touch an individual property
| Date | What happens | Who it affects |
|---|---|---|
| 3 Jun 2021 | RD 390/2021 in force: tourist-use dwellings brought into scope, the four-month exemption removed, class G certificates cut to five years' validity | All owners |
| 12 Aug 2025 | A current, registered certificate becomes mandatory for any mortgage valuation (Orden ECM/599/2025) | Anyone buying with a Spanish mortgage |
| 24 Apr 2026 | Plan Estatal de Vivienda 2026–2030 in force (RD 326/2026), including the rehabilitation aid lines the regions will run | Owners planning works |
| 30 Sep 2026 | New certificate model, new labels, new XML format and a recalibrated rating methodology become mandatory | Certificates issued from that date |
| 31 Dec 2026 | Income tax deductions for energy works end for individual dwellings; the national renovation plan takes effect in its final form | Owners renovating |
| 31 Dec 2027 | Income tax deductions end for works on whole residential buildings | Communities of owners |
| 2030 | Spain's own target: residential energy consumption down 25% against 2020, delivered through renovation volume | National policy, funded through grants |
| 2035 | The same target at 33% | National policy |
| 2050 | Zero emissions across the Spanish building stock | The end point of the plan |
The EU calendar in the background
| Date | What happens |
|---|---|
| 1 Jan 2025 | End of public financial incentives for stand-alone fossil-fuel boilers |
| 29 May 2026 | Deadline for transposing the directive — Spain reached it only partly compliant, so national rules are still being finalised |
| 31 Dec 2026 | Solar installations required on new public and non-residential buildings over 250 m² |
| 31 Dec 2027 | Solar reaches existing non-residential buildings over 500 m² undergoing major renovation |
| 1 Jan 2028 | All new publicly owned buildings must be zero-emission |
| 31 Dec 2029 | Solar required on all new residential buildings and new roofed car parks |
| 1 Jan 2030 | All new buildings zero-emission; worst-performing 16% of non-residential stock renovated; housing stock average primary energy down 16% against 2020 |
| 2033 | 26% of the worst-performing non-residential stock renovated |
| 2035 | Housing stock average primary energy down 20–22% against 2020 |
| 2040 | Target date for phasing out fossil-fuel boilers |
| 2050 | Climate-neutral building stock across the EU |
Read the two tables with one thing in mind: only the Spanish dates attach to a property, and none of them requires you to renovate. They govern the certificate itself, the mortgage valuation, and the windows during which public money is available. Everything in the second table is a rule for new construction, a rule for commercial buildings, or a national average that governments have to hit through policy — nothing there lands on your title deed.
One change worth watching. The new European scale reserves the letter A for zero-emission buildings, which means that when Spain re-bases its scale as part of the transposition, today's letters may not map one-to-one onto tomorrow's. A property rated A under the current Spanish scale is not automatically an A under the future one. The details will be set in the Spanish implementing rules.
What the certificate really costs
Fees are not regulated, and quoted prices vary widely because the work varies widely. What drives the number:
- Property type. An apartment inside a block is the simplest case. A detached villa has more exposed façade, several floors, more varied installations, sometimes a pool plant room — and costs materially more to assess.
- Size. For a detached home the rule of thumb runs about €0.60–1.50 per m².
- Whether the technician actually visits. The cheapest quotes are for desk-based certificates with conservative defaults entered wherever nothing was checked. They are legal, and they typically land a letter or two below what a proper site visit would give the same property.
- Region, travel and urgency. A same-week certificate for a completion date costs more than one ordered a month ahead.
- Whether registration is included. Some quotes cover lodging the certificate with the region and the fee; some do not.
| Property | Typical technician's fee (2026) |
|---|---|
| Apartment in a block | Roughly €50–200; a 90 m² flat commonly lands around €100 |
| Detached house or villa | Roughly €150–400, depending on size and complexity |
| Whole residential building | Priced per unit, with a project fee on top |
On top comes the regional registration charge, set independently by each autonomous community and updated most years:
| Region | Registration fee for a home (2026) |
|---|---|
| Comunitat Valenciana (Costa Blanca) | Around €10 per dwelling, flat or villa; buildings charged per unit |
| Andalucía (Costa del Sol) | €14.98 up to 250 m², €57.44 above (paid on modelo 046) |
| Illes Balears (Mallorca) | Under €10 |
| Región de Murcia (Costa Cálida) | Filed electronically; among the lowest in Spain |
| Madrid, Canarias, Aragón and several others | No registration fee |
Registration is electronic everywhere on the Mediterranean coast, and the technician normally handles it as part of the fee — worth confirming, because "certificate issued" and "certificate registered" are different milestones, and only the second one counts.
Does the letter change what you pay?
Running costs are the largest effect and the one nobody puts in the listing — the multiple described earlier, on the heating and cooling half of the bill, every year you own the property.
Mortgage pricing. Spanish banks discount green mortgages for properties rated A or B, typically by around 0.1 percentage points off the rate, held for the life of the loan and stackable with the usual salary and insurance discounts. Modest, but it is one of the few pricing advantages a new build has over a resale on paper — and, separately, the certificate is now a hard requirement for the valuation itself.
Tax relief on improvements. Spain's personal income tax deductions for energy-improvement works currently run to 31 December 2026 for individual dwellings and 31 December 2027 for whole residential buildings. Be careful with the legal history here, because it is messy: the extension first arrived in Real Decreto-ley 16/2025, was repealed when Congress declined to ratify that decree on 27 January 2026, and was then restored by Real Decreto-ley 7/2026 in March 2026, with effect from 1 January 2025. It has been extended, cancelled and re-extended inside fifteen months, so confirm the position with an asesor fiscal before you budget around it. Three tiers: 20% of the spend for works cutting heating and cooling demand by at least 7%; 40% for cutting non-renewable primary energy use by 30% or reaching class A or B; 60% for building-wide renovations achieving a 30% improvement. Every tier requires an energy certificate issued before the works and another after them — which is why the certificate of an F or G property you intend to renovate is worth keeping rather than filing away. The 20% and 40% tiers apply to a habitual residence or a property let as a home; a pure holiday home does not qualify. Our guide to property tax in Spain for non-residents covers the wider position.
What the certificate does not tell you
It is a calculation, not a measurement. Nobody monitors the property for a year; a technician feeds observed characteristics into software. That has consequences:
- Quality varies, in the direction described above — a cheap desk assessment understates a decent property.
- It says nothing about comfort. Noise, damp, cross-ventilation, whether the terrace faces the afternoon sun — none of it is in the model, and on the Spanish coast those decide how a home feels far more than a letter does.
- It is not a survey. Structure, roof condition, plumbing and the legality of the build are all outside its scope.
- The reference date matters. A certificate registered in 2017 describes the property as it was then — better if the owner has since installed aerothermal heating, worse if the boiler has failed.
Checklist for buyers
- Ask for the certificate before you make an offer, not at the notary. It is a two-page PDF the seller already has.
- Check it is registered — look for the registry number and the autonomous community's stamp, not just a technician's signature. Without it there is no mortgage valuation.
- Check the date. Ten years from registration, five for class G. An expired certificate must be redone before completion, at the seller's cost.
- Read the kWh per m² figure, not only the letter, and compare properties within the same province.
- On a new build, ask for the completed-works certificate at handover and check it against the design rating you were shown.
- Read the recommended improvements page. It tells you what the property needs and what class it would reach.
- Price the gap. On an E or F resale, windows and a heat pump are the usual first works — get a quote before you agree the price.
- Keep it if you plan to renovate: the pre-works certificate is a condition of the income tax deduction.
- Confirm it is annexed to the deed and take your copy — you will need it when you sell or let, as our guide to selling property in Spain explains.
The certificate is the cheapest piece of due diligence in a Spanish purchase and the one most buyers glance at and file. It will not decide whether you buy. It will tell you, before you negotiate, which of the two properties on your shortlist is going to be more expensive to live in, and roughly what it would cost to close the gap. For the rest of the process, start with our step-by-step guide to buying property in Spain and the full breakdown of buying costs.
