Buying Off-Plan Property in Spain: Risks and Protections

What does buying off-plan mean in Spain?

Off-plan means you buy a home from a developer before it is finished, usually from plans and a show apartment. You sign a private purchase contract, pay in instalments tied to construction milestones, and complete at the notary when the building is registered and the licence of first occupation is issued. The process is lawful and common on the Costa del Sol, but the risk profile differs from a resale: your money leaves your account long before you receive keys, so the legal stack around stage payments matters more than negotiating furniture. The transactional search for current projects sits on our new developments hub; this page covers the buyer-protection rules that should be satisfied before you sign.

What bank guarantee does Spanish law require on off-plan deposits?

The Building Act (Ley 38/1999, ordenación de la edificación) requires the promoter to guarantee every amount you pay before completion. Ley 20/2015, in force from 1 January 2016, tightened how that guarantee works: it must be an individual aval bancario or a seguro de caución, issued for the full amount you have paid plus applicable taxes and legal interest from each payment date until the agreed delivery date. The guarantee must cover the case where construction does not start or does not finish on time. The developer must hand you the guarantee document when you sign the private contract, not weeks later.

From the building licence onward, promoters must guarantee return of advance payments plus legal interest through insurance or a joint-and-several bank guarantee if construction does not start or finish by the agreed delivery dateSource: Ley 38/1999, DA 1ª (as amended by Ley 20/2015), BOE · October 2026 · View market data →

• Individual guarantee: one policy or aval per buyer and unit, not a vague promise on a brochure.
• Full amount: covers everything paid on account, including VAT on those instalments, plus legal interest to the contractual delivery date.
• Execution path: you must first demand repayment from the developer; if nothing arrives within 30 days, you can claim against the guarantor.
• Cancellation: the guarantee ends when the licence of first occupation is issued or the deed is signed, whichever the contract specifies.

Why does the special account matter?

Stage payments must flow into a cuenta especial at a credit institution, separated from the promoter's other funds. The bank opening that account is responsible for ensuring the guarantee exists before money moves. Spanish courts have held banks to a duty of vigilance when buyers paid into accounts that were not properly segregated, even where paperwork was messy. Your lawyer should confirm the IBAN on the contract matches the special account named in the guarantee, and that each transfer receipt shows the payment landed there.

Advance payments on homes under construction must be received through credit institutions into a special account segregated from the promoter's other funds; the bank must require the guarantee before opening the accountSource: Banco de España, guía al cliente bancario on avales para compra de viviendas · October 2026 · View market data →

What should you check before paying on a new build?

Treat off-plan due diligence as a document checklist, not a viewing-day impulse. Your lawyer should verify the developer's standing, the building licence for this phase, the registered unit description, the payment schedule, and the guarantee wording in Spanish even if the sales file is in English. Confirm how parking and storage are registered. On the Costa del Sol we still see buyers who sign at a launch event and only later discover that the guarantee references another phase.

• Licencia de obras and, where relevant, declaración responsable for the exact block you are buying.
• Individual guarantee or insurance certificate naming you, the unit, and the amounts paid.
• Special-account IBAN and proof that your payment was received there.
• Contractual delivery date, penalty clause for delay, and what happens if the date slips.
• Specification schedule: finishes, kitchen line, air conditioning, and any upgrades you paid for.

Private deposit contracts on resales are covered in our reservation and arras guide. Off-plan sales use the developer's compraventa with stage payments instead, but the same rule applies: no money moves until your lawyer is satisfied with the paperwork.

How does tax on a new build differ from a resale?

A first sale from a developer pays 10% VAT (IVA) plus 1.2% stamp duty (AJD) in Andalucía in 2026, not the 7% transfer tax (ITP) that applies to resales. That difference often exceeds €10,000 on a mid-market apartment, which is why comparing headline prices between our resale inventory and a brochure price list misleads. The full regional map sits in our property transfer tax guide.

Costa del Sol active resale inventory: 7,850 listings, coast median asking €655,500 at €4,734/m²; apartments median €489,000 across 3,586 listingsSource: Hometailor market data · October 2026 · View market data →

What happens if the developer delays or stops?

If the delivery date passes without the licence of first occupation, or construction stalls, you are not limited to chasing the sales agent. Send a formal written demand to the developer for contract resolution and refund of all amounts paid. Spanish practice under the amended Building Act gives the developer 30 days to repay; after that you can call the bank guarantee or insurance. Keep every transfer receipt, the guarantee PDF, and proof of the demand. Insolvency of the promoter is exactly the scenario the guarantee regime was designed for, provided the guarantee was valid when you paid.

When is off-plan worth the extra process?

Off-plan suits buyers who want a new specification, ten-year structural warranty coverage, and modern energy ratings, and who can tolerate two to three years of build time. Resale suits buyers who need keys this season or who want to inspect the exact apartment, community minutes, and neighbour noise before paying. Against October 2026 inventory, the coast still carries deep resale choice at a €655,500 median across 7,850 active listings, while new supply is concentrated in developer phases linked from our Marbella and Estepona new-development pages. Neither route is inherently safer; the paperwork on guarantees and licences is what separates a protected purchase from an exposed one.