How to Choose a Builder for a Major Renovation on the Costa Blanca

The short answer

Choose a builder for a major Costa Blanca renovation by testing five things: legal identity, relevant project experience, quality of the proposed scope, ability to coordinate the whole job and willingness to document money, changes and progress.

The lowest total is not automatically the best value. A quotation can appear cheaper because it excludes the kitchen, licences, waste, VAT, product allowances or essential technical work. For a complete renovation, compare what will actually be delivered—not the final number alone.

The builder-selection scorecard

No single document proves that a company is right for your project. The purpose of due diligence is to build a consistent body of evidence.

1. Define the project before interviewing builders

A builder cannot price an undefined renovation accurately. Prepare the property location, approximate area, photographs, intended use, desired layout, essential outcomes, quality level, budget range and target period.

For major work, drawings and a written specification may be necessary before meaningful comparison. Read our complete guide to renovating in Orihuela Costa and 2026 cost guide to establish the scope first.

Decide whether you need a contractor for a defined construction package or one experienced team to coordinate strip-out, structure, installations, finishes and exterior work. HURPOMAR’s complete-reforms service is positioned for the second type of substantial project.

2. Confirm exactly who you would be contracting

Ask for the full legal or trading name, NIF/CIF, physical address, named representative and invoice details. Make sure the name on the quotation, contract, invoices and bank account is consistent or properly explained.

For construction-sector contractors and subcontractors, Spain’s official Register of Accredited Companies allows a public check of REA registration. The register relates to construction companies’ organisation and occupational-risk-prevention capacity; it is a useful compliance check, not a quality award or guarantee of workmanship.

Ask what liability and other project-relevant insurance is in place and request current evidence appropriate to the work. Complex structural or technical projects may involve additional agents whose responsibilities and insurance should be established separately.

3. Look for experience that resembles your project

“Thirty years in construction” is less informative than evidence of projects with similar building type, scale, structure, finish and location.

Ask to see:

• Complete projects, not only attractive close-ups.
• Before, during and after photographs.
• Structural and concealed-service stages where relevant.
• Similar villas, apartments, extensions or new homes.
• Projects completed within the coastal environment.
• How unexpected conditions and variations were handled.
• References whose identity and permission to be contacted are clear.

HURPOMAR’s project portfolio shows completed new-build villas and a coordinated pool-and-garden transformation. Evidence should help you understand the type of work a company actually undertakes.

4. Assess who will manage the job

Ask who prepares the quotation, who will be your day-to-day contact, who supervises on site, who coordinates subcontractors, who communicates with the project technician and who can approve decisions on behalf of the company.

A good organisation does not mean that one person performs every role. It means responsibilities are visible and information reaches the right person.

For owners living overseas, reporting ability is especially important. Our guide to renovating in Spain while living abroad explains the weekly reports, approvals and evidence that make remote projects manageable.

5. Compare the quotation line by line

Mark every unclear item. “Bathroom included” does not explain tile allowance, sanitaryware, taps, screen, concealed fittings, waterproofing or lighting. “Complete electrical installation” should be supported by an agreed plan and specification.

Use the same information for every bidder. If the scope changes while quotations are being prepared, issue the update to all of them.

6. Understand allowances, exclusions and provisional sums

An allowance assigns a budget to a product not yet selected. A provisional sum covers work that cannot yet be defined accurately. Both can be legitimate, but they move final-price risk back to the owner.

Ask:

• What quantity and quality assumption supports the figure?
• Does it include delivery, installation, waste and VAT?
• What happens if the selected product costs more or less?
• Which hidden conditions could change the provisional amount?
• When must the final selection or investigation occur?

The more provisional the quotation, the less useful the headline total becomes.

7. Check the contract before work starts

The written agreement should identify the parties and property, contract documents, scope, price or pricing basis, VAT, start conditions, programme, payments, owner-supplied items, access, insurance, variations, delays, suspension, termination, defects, handover and dispute process.

For regulated building projects, Spain’s Building Regulation Act defines agents in the building process and their obligations. The applicable contractual and technical framework depends on the nature of the work, so obtain independent advice for a major project.

Never rely on a long message history as the only contract. Messages can support decisions, but the signed documents should establish the commercial framework.

8. Make payment stages measurable

Deposits may be needed for mobilisation and specially ordered products. The amount and purpose should be stated. Later payments should correspond to clear milestones, measured progress or documented materials.

Before paying, retain the invoice or payment request, evidence of the relevant milestone, approved variations and proof of any materials being paid for. Use traceable payment methods and ensure the recipient matches the contracting arrangement.

The Spanish Tax Agency provides information about tax certificates for contractors and subcontractors. Ask your tax or legal adviser whether any certificate is relevant to your position and project.

9. Demand a written variation procedure

Every material change should record:

1. Why the change is required or requested.
2. Work being added, removed or replaced.
3. Price difference and VAT treatment.
4. Effect on the programme.
5. Effect on other trades or products.
6. Owner approval before proceeding, except for a genuine immediate safety action.

Hidden damage should be photographed or filmed before removal where safe and practical. A variation register prevents many final-account disputes.

10. Clarify permissions and technical responsibility

Ask which municipal procedure is expected, who prepares each document, who pays fees and whether a competent technician must design or supervise part of the work. Current local forms are available from the Ayuntamiento de Orihuela.

Be cautious if somebody dismisses permission questions without reviewing the actual work. Equally, do not assume that the contractor alone can give legal or planning advice on every property issue.

11. Ask how waste, safety and neighbours will be managed

The site plan should address protection, access, dust, noise, working hours, waste routes, containers, communal areas and emergency contacts. Spain’s construction and demolition waste rules define responsibilities for the producer and holder of waste according to the project.

For apartments, read our apartment renovation guide before choosing a start date. For detached properties, our Cabo Roig villa-renovation guide covers the building envelope, pool areas and coastal conditions. These constraints can affect both quotation and programme.

12. Test communication before committing

Notice what happens during the quotation stage. Are questions answered directly? Are assumptions recorded? Do revised documents arrive with a date and version? Can the company explain what it needs from you?

Agree a reporting rhythm. A useful weekly update may include work completed, consistent photographs, next week’s plan, decisions required, approved changes, budget position and risks.

Good communication does not mean constant messaging. It means the right information arrives in a form that supports decisions.

13. Interview questions worth asking

14. Warning signs

• Pressure to start immediately without a defined scope.
• A large cash request without contract, invoice or stated purpose.
• Refusal to identify the contracting entity.
• Quotations that omit VAT, exclusions or material allowances.
• No distinction between estimate, provisional sum and fixed item.
• Major structural opinions without technical review.
• Changes completed before price or programme effect is agreed.
• Repeatedly vague progress photographs.
• No clear responsibility for permissions, waste or site safety.
• Unwillingness to perform a structured handover.

One warning sign may have an explanation. Several forming a pattern should not be ignored.

15. Make the final comparison

Score each proposal for scope completeness, comparable experience, compliance evidence, project team, programme realism, communication, product clarity, change control, handover and total price. Weight the areas according to your project risk.

Do not manufacture false precision by awarding points to documents you do not understand. Technical, legal and contractual review can be valuable before signing a major renovation.

Frequently asked questions

How many quotations should I obtain?

Enough to understand the market and compare approaches—often two or three well-prepared proposals are more useful than many superficial prices. Each bidder should receive the same scope.

Should I choose a builder recommended by an estate agent or neighbour?

A trusted introduction is useful, but the project may differ from the recommender’s work. Complete the same checks and obtain your own written scope and contract.

Is the cheapest quotation always risky?

Not necessarily. It may reflect efficiency or a different commercial approach. The risk arises when the reason for the difference cannot be explained through quantities, inclusions, allowances, specification or method.

Should the builder arrange the licence?

That depends on the agreed service and required procedure. The contract should identify who prepares, submits and pays for each item and which professional holds responsibility.

Looking for a builder for a major project in Orihuela Costa?

HURPOMAR is a family building company established in 1995 and based in Cabo Roig. We specialise in complete property transformations, structural renovations, major extensions and bespoke new-build homes—not isolated maintenance visits. Learn about HURPOMAR or send your property details through our project enquiry page.

Important: This guide provides general information and does not constitute legal, tax, financial, planning, architectural or engineering advice. Independently verify the company, documents and contractual arrangements relevant to your project.