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WHY REVIEWING YOUR PROPERTY DOCUMENTATION IS ESSENTIAL BEFORE BUYING OR SELLING A PROPERTY
In today’s competitive real estate market in the Costa Blanca, especially in areas like Altea, Albir, Calpe or Moraira, international buyers expect transparency, legal security, and clarity.
A beautiful property is no longer enough. Buyers want guarantees. This is where real estate due diligence becomes essential.
At ALTEALEX, we help property owners prepare their homes for sale by identifying and resolving legal and urban planning issues in advance and ensuring a smooth, secure, and successful transaction. And, of course, we also help homebuyers to purchase the villa or apartment of their dreams with confidence, sparing them any problems or unpleasant surprises.
WHAT IS REAL ESTATE DUE DILIGENCE?
Real estate due diligence is a comprehensive review of a property’s legal, administrative, registry, and urban planning status.
This process allows us to detect potential issues such as:
- Outstanding debts or charges on the property (sometimes unknown to the owners)
- Lack of the necessary documents to complete the sale
- Discrepancies between Land Registry and Cadastre
- Undeclared constructions or extensions
- Urban planning irregularities
- Legal limitations affecting the sale
By addressing these issues early, you avoid delays, renegotiations, or even losing serious buyers.
COMMON PROBLEMS WHEN BUYING OR SELLING PROPERTY IN SPAIN
Many homeowners, especially international owners, are unaware that their property may have legal or urban planning issues.
At ALTEALEX, we frequently encounter:
1. Registry and Cadastre discrepancias. Differences in built area or unregistered modifications can create complications during the sale process.
2. Undeclared works or extensions. Swimming pools, terraces, or additional rooms not legally registered can delay or block a transaction.
3. Urban planning issues. Properties classified as out of planning or located on non-urban land require expert analysis.
4. Missing key documentation. Building permits, habitation certificates, or proof of property age are often required by buyers and notaries.
NOT ALL REAL ESTATE AGENCIES OFFER TRUE DUE DILIGENCE
While many agencies in Altea and across the Costa Blanca focus primarily on marketing and sales, not all are equipped to carry out a thorough legal and urban planning review of a property.
Identifying potential issues is already complex, but resolving them requires specialized knowledge in legal, registry, and urban planning matters, as well as experience dealing with local authorities and technical professionals, and unfortunately most estate agents in Altea and along the Costa Blanca lack this kind of experience and expertise, and are not even able to identify potential issues that could prevent or hinder the sale of a property.
For international buyers and sellers, this difference is critical. Choosing an agency without this expertise can lead to delays, failed transactions, or unexpected complications at the final stage.
At ALTEALEX, due diligence is a core part of our services. We’ve been doing this for over 45 years.
HOW ALTEALEX HELPS YOU
At ALTEALEX, we combine real estate expertise, legal knowledge, and urban planning insight to offer a complete and tailored service. Our due diligence service includes:
- Full property documentation review
- Land Registry and Cadastre analysis
- Urban planning assessment
- Risk identification before listing your property
- Practical solutions to regularize any issues
Our goal is simple: to make your property legally secure, market-ready, and attractive to international buyers.
Since 1979, we have successfully handled more than 3,000 sales of houses and apartments in Altea and other towns on the Costa Blanca and, as a result, we have never had to make a claim under our professional indemnity insurance policy, which provides cover for any potential errors on our part.
BENEFITS OF DOING DUE DILIGENCE BEFORE BUYING OR SELLING
Carrying out a due diligence process before buying a house or listing your property provides clear advantages:
- Avoid last-minute surprises during negotiations
- Build trust with international buyers
- Reduce time on the market
- Support your asking price with legal certainty
- Prevent delays at the notary stage
In a competitive market like Costa Blanca, security and transparency sell properties faster.
LOCAL EXPERTS IN ALTEA AND OTHER COSTA BLANCA LOCATIONS
Urban planning regulations in the Valencian Community can be complex, especially for older properties or homes with modifications.
At ALTEALEX, we have in-depth local knowledge of Altea, Albir, Alfaz del Pi, Calpe, La Nucia, and surrounding areas, allowing us to provide practical, effective solutions tailored to each property.
Thinking of buying or selling a property in Costa Blanca? Before buying or putting your home on the market, make sure everything is in order.
At ALTEALEX, we help you review your property documentation, carry out a full due diligence process before you buy, and resolve any issues, so you can buy or sell a property with confidence and without complications.
Contact us today and discover how we can help you buy a house or sell your property safely and successfully.
Author: Carlos Barreras González, Lawyer, member no. 1,717 of the Alicante Bar Association


