A renovation contract is the primary legal instrument protecting both the property owner and the contractor throughout a renovation project. In Spain, while there is no single mandatory standard form for residential renovation contracts, certain elements are legally and practically essential.
This article explains what a professional renovation contract in Spain should contain, what to watch for, and why certain clauses matter more than others — particularly for international property owners.
Why the contract matters more than you think
Many renovation disputes — in Spain and elsewhere — arise not from dishonesty but from ambiguity. Two parties interpret the same verbal agreement differently, extras are added without formal approval, or the scope of "included" work is never clearly defined.
A well-written contract eliminates most of these scenarios before they occur. For property owners who are managing projects remotely or are unfamiliar with Spanish construction practices, the contract is effectively the instruction manual for how the project will operate.
Essential elements of a renovation contract in Spain
1. Identification of the parties
The contract must clearly identify:
- The property owner (client), with full legal name and ID or passport number
- The contractor, with company name, registered address, and Spanish tax ID (CIF)
- Any subcontractors or third parties with significant roles
Verifying the contractor's legal registration in Spain protects you if disputes require legal resolution.
2. Description of the works (scope of works)
This is the most important section of the contract. It should describe in precise terms:
- Every category of work to be performed (demolition, structural, electrical, plumbing, finishes, etc.)
- The specific materials and brands to be used, or acceptable equivalents
- Areas of the property affected
- Any works explicitly excluded
Vague scope descriptions are the most common source of renovation disputes. "Full renovation of kitchen" is not a scope — a detailed list of every item to be replaced, installed, or modified is.
3. Technical documentation
If the project requires an architect or technical architect, the contract should reference:
- The name and registration number of the responsible professional
- Whether a technical project (proyecto técnico) has been prepared
- The permit reference number once approvals are obtained
4. Total price and VAT
The contract must state:
- The total agreed price in euros
- Whether VAT (IVA) is included or additional
- The applicable VAT rate (10% for renovation works on primary residences in Spain, 21% for other categories)
Never sign a contract where the price is described as approximate or subject to adjustment without a defined change process.
5. Payment schedule
The payment schedule should be milestone-based, not time-based. Recommended structure:
- Initial deposit: 10 to 20% upon contract signing (not more)
- Intermediate payments: tied to completion of defined phases (structural completion, rough installations, finishes)
- Final payment: 5 to 10% retained until formal handover and snag list resolution
Avoid contracts that request more than 30% before work begins, or that tie payments to calendar dates rather than verified progress.
6. Timeline and key milestones
The contract should specify:
- The agreed start date
- Target completion date
- Key intermediate milestones
- What constitutes a justified delay (supply issues, permit delays, unforeseen conditions) versus an unjustified one
7. Change order process
Any changes to scope, materials, or cost after contract signature should follow a defined process:
- Written request from either party
- Written approval from the owner before execution
- Updated budget and timeline impact documented
This is particularly important for remote owners who cannot always be present to approve changes verbally.
8. Warranty clauses
Under Spanish law (Ley de Ordenación de la Edificación), construction works carry statutory warranties:
- 1 year for minor defects (finishes, fixtures)
- 3 years for installation defects (electrical, plumbing, HVAC)
- 10 years for structural defects
The contract should reference these statutory obligations and specify the process for raising warranty claims after handover.
9. Insurance
Professional contractors in Spain should carry:
- Seguro de Responsabilidad Civil (civil liability insurance)
- Seguro de Accidentes (worker accident insurance)
Request certificates before work begins. If a worker is injured on an uninsured site, the property owner may face liability.
10. Dispute resolution
The contract should specify:
- Governing law (Spanish law)
- Jurisdiction for disputes (typically the municipality where the property is located)
- Whether mediation is required before litigation
Red flags to watch for
- Contracts with no scope detail, referencing only a general budget figure
- No VAT specified — suggests the contractor may be operating informally
- Payment schedules requiring more than 30% upfront
- No warranty clause
- No change order process — leaves the door open to uncontrolled extras
Conclusion
A renovation contract in Spain is not bureaucracy — it is the framework that makes a project manageable and protects your investment. International property owners in particular should insist on complete, formal contracts before any work begins. If a contractor is reluctant to provide one, that reluctance itself is informative.