Self-build mortgages in Spain: how they work

A "self-build mortgage" (hipoteca autopromotor) is the commercial name for the mortgage loan that finances building your own home. It is not a separate legal category: Law 5/2019 (LCCI) can apply to the loan, and Law 38/1999 (LOE) governs the build, including the ten-year structural damage insurance (seguro decenal) and its exemption for the individual self-builder.

What is a self-build mortgage?

It is a loan secured by a mortgage and intended to finance the construction of a home for the borrower's own use, on land the borrower already holds. It does not exist as a legal category: it is the commercial name institutions use for this kind of operation.

The Bank of Spain, in its Bank Customer Portal (publication of 19 July 2022), describes it as a specific financial product for someone building their own house, which institutions may present commercially as a mortgage loan similar to an ordinary one but with operational particularities. In the legislation reviewed, the term "autopromotor" (self-builder) appears in the LOE — in its second additional provision, for the exemption from the ten-year structural damage insurance — not as a category of mortgage loan.

Someone who builds for themselves holds two positions at once. Towards the bank they are a borrower, protected by the LCCI when the loan falls within its scope. Towards the build they are a developer (promotor): article 9.1 of the LOE treats as developer anyone who decides on, drives, programmes and finances building works, with their own or borrowed funds, for themselves or for later transfer. That double role explains the applicable framework:

Does the LCCI apply to a self-build loan?

Yes, when the loan fits article 2 of Law 5/2019: it is granted professionally by a lender to a natural person and is secured by a mortgage on residential property (letter a), or its purpose is to acquire or retain property rights over land or buildings, built or to be built, where the borrower, surety or guarantor is a consumer (letter b).

The words "to be built" in article 2.1.b are what bring the self-build purpose within scope, and letter a covers the case of security over residential property. If the LCCI applies, its transparency rules kick in:

• Pre-contractual documentation (art. 14.1). The lender must give you the FEIN (the Spanish binding offer document), the FiAE, the draft agreement and the cost information, at least ten calendar days before signing.
• Prior notarial act (art. 15). If the loan is executed in a public deed, the notary verifies in a prior act that you received the documentation on time and understand its content; without that compliance, the deed cannot be authorised.

The costs attached to the loan (valuation, notary, registry, processing agent) follow the general rules of any mortgage: you can review them in the guide on mortgage costs and simulate the resulting payment in the calculator.

What obligations do you take on as a self-builder under the LOE?

Those of a building developer: article 9.2 of the LOE requires the developer to hold a right over the plot that entitles them to build, to process and obtain the mandatory licences and authorisations, to take out the article 19 insurance where applicable, and to hand over the documentation of the executed works.

Beyond those direct obligations, the LOE requires the involvement of technical agents whom the self-builder must engage:

• Designer (arts. 2 and 10). The project is drawn up on the developer's commission. In buildings whose main use is residential (the group in art. 2.1.a), the designer must hold the qualifying degree of architect.
• Site management team (arts. 12 and 13). The works director and the director of works execution are separate agents, and both sign the final works certificate according to their functions.
• Final works certificate (Technical Building Code, RD 314/2006, Annex II.3). The director of execution certifies the material direction and control of the works; the works director certifies that the works conform to the project and are ready for their proper use.

The documentation of the executed works forms the Building Book (Libro del Edificio) (art. 7 LOE), which must be handed to the building's final users. As shown below, that final works certificate reappears in the new-build declaration deed and in the cadastral declaration.

Do you need ten-year structural damage insurance if you build for yourself?

No, if you are an individual self-builder of a single single-family home for your own use: the second additional provision of the LOE exempts you from the ten-year guarantee. Outside that exception, in buildings mainly intended for housing the article 19.1.c guarantee is mandatory.

The ten-year guarantee covers, for ten years, material damage to the building caused by defects of structural origin that compromise its mechanical resistance and stability. In the three-year and ten-year guarantees, the policyholder is the developer (art. 19.2.a), although it may be agreed that the builder takes it out on the developer's behalf.

The self-builder's exemption has an important counterpart: if you transfer the home inter vivos within the ten-year period, you are obliged to take out the guarantee for the time remaining, unless the buyer expressly releases you and your own use of the home is evidenced. It is worth bearing in mind before selling a self-built house less than ten years old.

The check on these guarantees comes when the deed is executed: under article 20 of the LOE, new-build declaration deeds for buildings subject to the LOE are neither authorised nor registered at the Land Registry without evidence that the article 19 guarantees are in place, unless the exemption applies.

Which licences and permits does building your home require?

Every act of building requires the mandatory administrative approval, consent or authorisation laid down by the applicable planning legislation (art. 11.3 of the Consolidated Land Law). Without that authorisation there is no legally covered build.

Planning — including planning enforcement and the upkeep and refurbishment of buildings — is a matter of the municipality's own competence, within the terms of state and regional legislation (art. 25.2.a of Law 7/1985). In legal practice, that makes the town hall the reference administration for the works licence.

The first occupation or use of the finished home is governed by the applicable planning and regional legislation (arts. 11.5 and 28.1.b of the Consolidated Land Law). The specific requirements — first-occupation licence, responsible declaration, habitability certificate — vary by autonomous region and municipality, so check them with your town hall and your region; this state-level guide does not detail them territory by territory. If you are at the earlier stage of buying the land or planning, the home buying checklist helps order the steps and documents.

How is the finished build put into a deed, registered and declared?

Through the deed of declaration of finished new build under article 28 of the Consolidated Land Law, its registration at the Land Registry, and the cadastral declaration using form 900D.

• New-build declaration deed (art. 28.1). The notary requires the technical certificate that the works are finished in accordance with the project, and the documentation evidencing compliance with the delivery requirements and the authorisations for use.
• Land Registry (art. 28.2). To register the new-build declaration, the registrar requires compliance with the same art. 28.1 requirements.
• Guarantees and Building Book. Art. 28 does not by itself mention the ten-year insurance: it comes in through the referral to building legislation, via art. 20 of the LOE (evidence of the art. 19 guarantees, unless exempt). The Building Book derives from art. 7 of the LOE.
• Cadastre. New constructions are facts subject to cadastral declaration or communication (arts. 13 and 16 of the Consolidated Cadastre Law). The declaration of alterations is filed with form 900D (Order HAC/1293/2018), preferably through the Cadastre's electronic office, within the general period of two months counted from the day after the fact — for works, the completion date is what counts (RD 417/2006, art. 28.2). For a new construction you are asked for, among other documents, the new-build deed if it exists, the final or technical certificate, photographs, plans, a descriptive report and the material execution cost.

What VAT and AJD does self-building pay?

Construction work contracted directly between you (the developer) and the contractor to build the home is taxed at 10% VAT, and the deed of declaration of new build is taxed under AJD on the real cost value of the declared new build.

The reduced VAT rate comes from article 91.One.3.1 of Law 37/1992: it applies to construction work, with or without materials, arising from contracts entered into directly between the developer and the contractor, for the construction of buildings mainly intended for housing (the AEAT specifies that main purpose as at least 50 per cent of the floor area being for homes). Two official clarifications bring the self-builder within that rule: binding ruling DGT V2759-21 treats as developer, for these purposes, the owner who builds or contracts the construction also for their own use; and the AEAT's practical VAT Manual 2025 (updated 29/09/2025) clarifies that developing a home for one's own use does not make the private individual a business for VAT purposes, because it is not intended for sale, allocation or transfer.

As for AJD, the tax base of the deed of declaration of new build is the real cost value of the declared new build (art. 70.1 of the ITPAJD Regulation, RD 828/1995). Each autonomous region may set the rate for notarial documents (art. 49.1.a of Law 22/2009), so there is no single state rate to publish: check it with your region's tax authority. For the taxation of buying the land or a finished home, see the guide on home purchase taxes.

How does the banking side work: stage payments, certifications and grace periods?

There is no rule governing the stage payments, the works certifications or the grace period of a self-build loan: they are commercial practice that depends on each institution's policy.

According to the Bank of Spain's description in its Bank Customer Portal, the arrangements you may come across are these, always as each institution's commercial decision:

• Stage payments. The institution might not hand over all the capital at once and might release the funds as the works progress, against the certifications provided. No rule obliges it to structure the loan that way.
• Approved project and licence up front. The institution might ask for the officially endorsed (visado) project and the municipal works licence before signing or before allowing drawdowns. Legally, what building requires is holding the mandatory administrative authorisations (art. 11.3 of the Consolidated Land Law); when the bank asks for them is commercial policy.
• Grace period during construction. A capital grace period may be agreed while the building work lasts; it is not required by law. Order EHA/2899/2011 (art. 30.3.c) only obliges the institution to warn about the effects of the grace period when the loan includes one.

An illustrative example, with no market figures: if you agreed a capital grace period during the works, in that period you would pay interest only and the outstanding capital would not fall, so the loan's total interest would increase compared with the same loan without a grace period. Before signing, ask in writing how the institution structures the drawdowns and what documentation it requires at each stage, and simulate the payment and total cost with your own amounts in the calculator, comparing the APRC (TAE; commonly APR) of the offers you receive.

Frequently asked questions

Is the self-build mortgage a specific legal category in Spain?

No. In the legislation reviewed it does not appear as a legal category: it is a commercial bank name. The term autopromotor appears in the second additional provision of Law 38/1999 (LOE), for the exemption from ten-year structural damage insurance, not as a mortgage product. Law 5/2019 (LCCI) applies to the loan when it fits its article 2, and the LOE applies to the build.

What VAT do you pay when building your own home?

Construction work for building a home is taxed at 10% VAT when there is a direct contract between the developer — including someone building for their own use — and the contractor, with or without materials, and the building is mainly for residential use. That reduced rate does not extend to subcontractors, and the separate purchase of materials without installation falls under the general 21% rate.

Is the self-builder obliged to take out ten-year structural damage insurance?

No, if they are an individual self-builder of a single single-family home for their own use: the second additional provision of the LOE exempts them from the ten-year guarantee. If they transfer the home inter vivos within the ten-year period, they must take out the insurance for the time remaining, unless the buyer expressly releases them and the owner's own use of the home is evidenced.

Does the law oblige the bank to release the money in stages or grant a grace period?

No. Releasing the capital in stages against works certifications and a grace period during construction are commercial practices that each institution may apply or offer under its own policy; no rule imposes them. Order EHA/2899/2011 (art. 30.3.c) only requires warning about the effects of the grace period when the loan includes an agreed one.

Summary

• The "self-build mortgage" is a commercial name, not a legal category: the LCCI applies to the loan when it fits its art. 2, and the LOE applies to the build.
• If the LCCI applies: FEIN and documentation at least ten calendar days in advance (art. 14.1) and a prior notarial act without which the deed cannot be authorised (art. 15).
• Ten-year structural damage insurance (art. 19.1.c LOE): mandatory in residential buildings, with an exemption for the individual self-builder of a single single-family home for their own use; if they sell inter vivos within ten years, they must take it out for the time remaining unless the buyer expressly releases them.
• Taxation: 10% VAT on construction work contracted directly with the contractor (it does not extend to subcontractors; materials bought separately, at 21%); AJD on the new-build deed over the real cost value, with the rate set by each autonomous region.
• Stage payments, certifications and grace periods are not regulated: they are each institution's commercial policy; Order EHA/2899/2011 only requires warning about the effects of an agreed grace period.

Simulate your loan's payment and total cost

Official sources

• Law 5/2019 (LCCI) — arts. 2 (scope), 14 (pre-contractual information, FEIN) and 15 (prior notarial act) (BOE, consolidated text).
• Law 38/1999 (LOE) — arts. 2, 7, 9, 10, 12, 13, 19 and 20 and second additional provision (ten-year insurance and self-builder exemption) (BOE, consolidated text).
• Consolidated Land and Urban Rehabilitation Law (RDL 7/2015) — arts. 11 (authorisations) and 28 (new build) (BOE, consolidated text).
• Law 37/1992 (VAT) — arts. 90.One and 91.One.3.1 (BOE, consolidated text).
• ITPAJD Regulation (RD 828/1995) — art. 70.1 (tax base of the new build) (BOE, consolidated text).
• Law 22/2009 (transfer of taxes) — art. 49.1.a (regions' regulatory power over AJD) (BOE, consolidated text).
• Technical Building Code (RD 314/2006) — Annex II.3 (final works certificate) (BOE, consolidated text).
• Law 7/1985 (local government framework) — art. 25.2.a (municipal competence over planning) (BOE, consolidated text).
• Consolidated Real Estate Cadastre Law — arts. 13 and 16 (declarations and communications) (BOE, consolidated text).
• RD 417/2006 (Cadastre implementing regulation) — art. 28.2 (two-month period) (BOE, consolidated text).
• Order HAC/1293/2018 — form 900D for cadastral declarations (BOE).
• Order EHA/2899/2011 (banking transparency) — art. 30.3.c (warning about the grace period) (BOE, consolidated text).
• AEAT — Construction or refurbishment works on homes (rate applicable to construction work).
• AEAT — Practical VAT Manual 2025 — concept of business or professional (updated 29/09/2025).
• DGT — Binding ruling V2759-21 — developer for the purposes of reduced VAT, including own use.
• Cadastre — Procedures and formalities (declaring new constructions).
• Bank of Spain — Bank Customer Portal: "Construye tu propia casa y finánciala" (publication of 19 July 2022; description of the commercial practice).

Notice: this guide and the calculator are for information and educational purposes. They are not financial, tax or legal advice, nor a loan offer. The tax treatment (VAT and AJD) depends on the legislation and, for AJD, on the autonomous region; planning requirements depend on your town hall and your region. Always check the terms with your bank, the competent administration and, if you need it, a professional. The lender's FEIN sets out the binding offer and the figures calculated under its conditions and assumptions.