Buying Guide · 10 min

Buying Off-Plan Property in Spain: The Complete Guide for Costa Blanca

2 June 2026 · Hansson & Hertzell

Off-plan buying offers lower entry prices and payment flexibility — but comes with unique risks. Here's how to do it safely on the Costa Blanca.

# Buying Off-Plan Property in Spain: The Complete Guide for Costa Blanca

Buying off-plan — purchasing a property before it is built, from plans or a developer's show home — is a common route for buyers on the Costa Blanca, particularly for those wanting a brand-new home at a price below the eventual finished market value. Done correctly, it can be an excellent strategy. Done carelessly, it can be a painful experience. This guide covers everything you need to know.

What Does Off-Plan Mean?

Off-plan (sobre plano in Spanish) means purchasing a property that has not yet been built, or is under construction. You are effectively buying from drawings, a 3D model, and a show apartment. You pay in stages as construction progresses, and take possession when the property is complete.

The attraction is clear: developers offer early-buyer pricing that typically sits 10–20 % below the anticipated finished-product market value. By the time you receive the keys, the property may already have appreciated.

The Payment Structure

Off-plan purchases typically involve a staged payment structure:

• Reservation deposit: 3,000–10,000 € to secure the unit and take it off the market
• Contracts exchange (private contract): 10–20 % of the purchase price paid upon signing the purchase contract
• Stage payments during construction: 10–20 % in one or more tranches tied to build milestones
• Final payment on completion: The remaining balance (typically 50–70 %) paid on the day you sign the deed with the notary

Most buyers fund the completion payment from a combination of savings and a Spanish mortgage, arranged closer to the completion date when the property exists as security.

The Key Legal Protection: Bank Guarantee

This is the most critical element of safe off-plan buying in Spain. Spanish law (amended in 2015 under Law 20/2015) requires developers to provide a bank guarantee or insurance policy covering all stage payments you make before construction is complete.

If the developer fails to complete the property for any reason — bankruptcy, construction delays, permit issues — you are entitled to a full refund of every euro you paid, plus legal interest.

Never pay stage payments to a developer who cannot provide a valid bank guarantee. This is non-negotiable. The guarantee must cover each payment specifically, not just a blanket developer guarantee.

What to Verify Before Signing

Your independent Spanish lawyer (never use the developer's lawyer — this is a structural conflict of interest) should verify:

1. The developer has a valid building licence (licencia de obras)
2. The property appears in the developer's land registry entry (nota simple)
3. The land is correctly classified for residential construction
4. The bank guarantee exists and covers your payments
5. The timeline for completion is realistic and what happens if delays occur
6. The quality specifications (memorias de calidades) are detailed and contractually binding

Common Risks and How to Mitigate Them

Construction delays: The most common complaint from off-plan buyers. Spanish developments routinely run 6–18 months late. Your contract should specify the completion date and the remedies available to you if it is missed (ideally: right to cancel and full refund, plus compensation).

Specification changes: A developer may substitute materials or fittings after signing. Ensure your contract requires the memorias de calidades to be adhered to, and specifies what happens if they change.

Developer insolvency: With a proper bank guarantee, your money is protected. Without one, you may join a queue of unsecured creditors. Never skip the guarantee verification step.

Mortgage risk: If you plan to finance the completion payment, apply for mortgage pre-approval early. Banks will not lend on an unbuilt property — you will need a mortgage offer closer to completion, when the building is substantially complete. Interest rates, your financial situation, or the property valuation may have changed.

The Completion Process

When the developer announces the handover date:

1. Your lawyer reviews the final deed for accuracy
2. A snagging inspection (inspección de vivienda) identifies any defects — insist on this before signing
3. You sign the notarial deed and pay the completion balance
4. Keys are handed over

Under Spanish law, developers carry a 10-year structural guarantee (seguro decenal), a 3-year guarantee on installation defects, and a 1-year guarantee on finishing defects. Document any snagging issues in writing at handover.

Is Off-Plan Right for You?

Off-plan works best for buyers who:

• Are flexible on timing and can wait 12–36 months for completion
• Want a new-build property to their taste without paying the premium of an existing new-build
• Have the financial structure to manage stage payments during construction
• Are comfortable with the inherent uncertainty of the process

It is less suitable for those who need a property by a specific date, are stretching financially, or prefer the certainty of what they are buying.