Off-Plan Property in Spain: Legal Guide and Protection for International Buyers
Buying a property off-plan (sobre plano, before construction is complete) is a common strategy in Spain, particularly for buyers who want to benefit from pre-construction prices and to customise certain elements of the property. The off-plan purchase has specific legal characteristics: payments are made in installments during construction, the developer is the seller, the property is delivered upon completion (typically 18-30 months from the contract). The legal protection for the buyer is provided by the Spanish Law on Off-Plan Property Purchases (Ley 57/1968, as updated) which requires bank guarantees for the buyer’s payments and establishes clear rights in case of developer default. This article explains the off-plan purchase process, the legal protections, the typical risks, and the strategies for a safe off-plan investment. A dedicated real estate lawyer is essential for off-plan purchases.


How off-plan purchases work
The off-plan purchase begins with the contract between the buyer and the developer, which sets the price, the payment schedule, the construction timeline, the property specifications, and the delivery date. The buyer pays an initial deposit (typically 10-30% of the price) and makes additional payments at agreed milestones during construction. The public deed is signed upon delivery of the completed property. The full mechanism is described in our off-plan property guide.
The construction period is typically 18-30 months from the start of construction (which may be later than the contract signing if the developer is still in the planning phase). The buyer’s payments during construction are protected by mandatory bank guarantees that ensure the return of the payments if the developer fails to deliver. The bank guarantees are the most important legal protection for the buyer and should be a non-negotiable element of the contract.
Mandatory bank guarantees
Spanish law requires the developer to provide bank guarantees (avales bancarios) for all amounts paid by the buyer during the construction period. The guarantee is issued by a Spanish bank and is held in trust for the buyer. If the developer fails to deliver the property (bankruptcy, default, abandonment of the project), the buyer can call on the guarantee and recover all payments made plus interest.
The buyer should verify the existence and the validity of the bank guarantee before making any payment to the developer. The guarantee should specifically cover the buyer’s payments and should be issued by a bank acceptable to the buyer. Some developers attempt to provide insurance company guarantees instead of bank guarantees, but bank guarantees are the legal standard and should be insisted upon.
Developer due diligence
The due diligence on the developer is the most important element of an off-plan purchase. The developer’s financial solvency, track record, and reputation determine the likelihood of successful delivery. The lawyer’s due diligence covers: the developer’s legal entity (registered in the Mercantile Registry); the developer’s financial statements; the developer’s history of completed projects (quality, on-time delivery); any pending litigation or regulatory issues; the financing structure of the project.
For projects by well-established developers with strong financial position and good track record, the off-plan risk is moderate. For projects by less-established developers, the risk is higher and additional safeguards may be needed. The buyer should be wary of significantly below-market prices, which may indicate developer financial pressure or other issues.
Urban-planning verification
The verification of the urban-planning status of the project is essential. The lawyer verifies that the developer has the necessary licences (construction licence, urbanisation licence) and that the project complies with the PGOU. Off-plan projects on land without proper urbanisation or without construction licences are at risk of not being delivered at all, or of being delivered with legal issues that affect the buyer’s ownership.
The urban-planning due diligence is particularly important in areas with recent regulatory changes or with known issues (illegal construction, environmental restrictions). The lawyer obtains the urban-planning certifications from the town hall and confirms that all the necessary authorisations are in place.
Payment structure and bank guarantees
The standard off-plan payment structure is: initial deposit on contract signing (10-15% of the price); installments during construction at agreed milestones (40-60% of the price spread across the construction period); final payment at delivery and signing of the public deed (30-50% of the price). Each installment paid during construction must be backed by a bank guarantee.
The buyer should verify each installment is properly protected by the bank guarantee before making the payment. The bank guarantee should be a separate document, issued by a bank, and held in trust for the buyer. The verification can be done by requesting the guarantee documentation from the developer at each payment milestone.
Risks of off-plan purchases
The main risks of off-plan purchases are: delivery delays (the developer takes longer than the contract date to complete the construction); quality issues (the delivered property does not meet the contracted specifications); legal issues (urban-planning irregularities, defects in title); developer default (the developer fails to complete the project). Each risk has its own mitigation strategy.
Delivery delays are very common in Spanish construction (the average project runs 6-12 months late from the contract date). The contract should include penalty clauses for delays beyond a defined grace period (typically 3-6 months), and the buyer should have the right to withdraw with full refund if the delay exceeds a substantial period (typically 12-18 months). The lawyer’s negotiation of these clauses is essential.
Quality verification at delivery
At delivery, the buyer (or the buyer’s lawyer) inspects the property to verify that it matches the contracted specifications: layout, finishes, equipment, common areas of the development. Any discrepancies should be documented in the delivery report (acta de entrega) and addressed by the developer before the public deed is signed.
Minor issues (cosmetic defects, missing fittings) can typically be addressed during a defects period after the public deed (typically 1 year for cosmetic issues, 3 years for habitability defects, 10 years for structural defects). Major issues should be resolved before signing the public deed, with retention of part of the price until the resolution is confirmed.
The public deed at delivery
The public deed of off-plan purchase is signed at delivery of the completed property. The deed includes the description of the completed property (with the final cadastral data), the price paid (all installments plus the final payment), the licence of first occupation (cédula de primera ocupación) issued by the town hall, and the bank guarantees status (cancelled at delivery).
The public deed is then filed at the Land Registry for the inscription of the buyer’s ownership. The off-plan purchase is treated for tax purposes as a new property purchase, with VAT (10% paid in installments to the developer) and AJD (1.2-1.5% paid by the buyer at the public deed) applicable. The lawyer handles the tax filings and the registry inscription as part of the standard service.
Customisation during construction
One of the attractions of off-plan purchases is the ability to customise certain elements of the property during construction: kitchen layout and finishes, bathroom fittings, flooring choices, in some cases the interior layout. The customisations are agreed with the developer and may involve additional payments above the base contract price.
The customisations should be documented in detail to avoid disputes at delivery. The standard practice is to have a written annex to the contract specifying each customisation, the cost, and the deadline for the buyer to make the choice. The customisations should be paid for separately and may not be protected by the bank guarantee.
Action steps for an off-plan purchase
First: engage an independent lawyer with off-plan experience. Second: conduct due diligence on the developer, the project, and the urban-planning status. Third: negotiate the contract with attention to bank guarantees, payment schedule, delivery timeline, penalty clauses for delays, and quality specifications. Fourth: verify bank guarantees at each installment payment. Fifth: inspect the property thoroughly at delivery and document any defects. Sixth: sign the public deed upon delivery with the lawyer’s coordination. Seventh: handle the post-purchase obligations (taxes, registry inscription). For a full consultation on an off-plan purchase, contact our team.
Off-plan purchases offer opportunities and risks. The professional handling of the legal aspects is essential to manage the risks and to secure the buyer’s position throughout the construction period and at delivery. The investment in a qualified lawyer is one of the best decisions an off-plan buyer can make.
