Buying off plan: the guarantees that protect the deposit
A developer selling off plan must hold every stage payment in a special account and back it with a bank guarantee or an insurance policy, so that if the building is not delivered the buyer recovers the amounts paid plus interest.
gelisted editorial team · Updated 15 August 2026
The short version
- Stage payments must sit in a special account, separate from the developer's funds.
- Each payment must be covered by a guarantee or insurance policy.
- The structural warranty on a new build runs 10 years.
- Habitability and finish warranties run 3 years and 1 year.
Off plan means paying for something that does not exist yet. The law's answer to that is not trust: it is a guarantee document per payment, and a buyer should hold one for every euro transferred.
The protection on deposits
Amounts paid before delivery must be received into a special account used only for the development, and each one must be secured by a bank guarantee or an insurance policy that the developer arranges and the buyer receives. If the works are not completed or the building is not delivered within the agreed period, the buyer may demand repayment of everything paid together with statutory interest, calling on the guarantee.
| Item | When | Why |
|---|---|---|
| Building licence | before any payment | confirms the works are authorised |
| Special account details | with the first payment | keeps funds separate |
| Guarantee or policy per payment | with each payment | secures repayment |
| Delivery date in the contract | at signing | triggers the guarantee |
| Specification with brands and grades | at signing | prevents downgrading |
| First occupation licence | before completion | required to connect utilities |
| Ten year structural insurance | at delivery | covers the building |
| Snagging list | at delivery | recorded and signed |
The three warranty periods
Ten years for structural defects affecting the stability of the building, backed by compulsory insurance. Three years for defects affecting habitability, such as damp, insulation or installations. One year for finishing defects. Each period runs from the formal completion of the works, not from the purchase, so a buyer acquiring 2 years after completion inherits 8 years of structural cover and none of the finish cover.
The specification is the contract
A brochure showing a kitchen is marketing. The annexed specification listing materials, brands, grades and equipment is what binds. It should state the flooring, the joinery, the glazing, the air conditioning, the sanitary ware and the kitchen appliances by type and standard. Where a clause permits substitution for materials of similar quality, insist that any substitution is agreed in writing rather than announced at delivery.
Photographs of the works at each stage, dated, are worth taking on every site visit, particularly before surfaces are closed.
Delivery
Inspect before signing the handover, ideally with an independent technician for 300 to 800 €. Record every defect on a signed snagging list with a deadline for rectification. Confirm the first occupation licence exists, since utilities cannot be contracted without it. And check that the property as built matches the deed and the registry, because a discrepancy discovered later is the buyer's problem to resolve.
A worked example fixes the figures. On a 400,000 € off plan purchase with stage payments of 10 per cent on signing, 20 per cent across construction and 70 per cent at completion, the buyer hands over 120,000 € before the keys exist. Each of those payments needs its own guarantee document, and 3 guarantees for 3 payments is the paperwork that makes the protection real.
Frequently asked
+How is my deposit protected?
Stage payments must sit in a special account and be covered by a bank guarantee or insurance policy per payment.
+What if the development is not delivered?
You may demand repayment of everything paid plus statutory interest by calling on the guarantee.
+How long is the structural warranty?
Ten years, running from formal completion of the works rather than from your purchase.
+What covers damp or insulation problems?
The three year habitability warranty, with one year for finishing defects.
+What should I do at handover?
Inspect with an independent technician, record a signed snagging list and confirm the first occupation licence exists.
Sources
- 1Boletín Oficial del Estado, BOE (August 2026)
- 2Govern de les Illes Balears, Govern de les Illes Balears (August 2026)