Why Do So Many Renovation Projects in Spain Fail? (And How Can You Avoid the Same Mistakes?)
Why Do So Many Renovation Projects in Spain Fail? (And How Can You Avoid the Same Mistakes?)
You see it everywhere on television and social media.
A run-down finca. A charming village house. Or a villa overlooking the Mediterranean.
A few months later, it has been transformed into a stunning dream home.
But reality is often very different.
More and more international buyers are purchasing properties in Spain with the intention of renovating them completely. Unfortunately, many projects end up costing far more than expected, experience significant delays, or are never fully completed.
Surprisingly, this is rarely because Spanish builders do poor work.
In most cases, the problems begin long before the renovation itself.
The Dream Often Starts with Too Much Optimism
Many buyers fall in love with a property.
They immediately picture the possibilities.
A modern kitchen. A swimming pool. An extra bedroom. A bright, contemporary interior.
What they don't see are the hidden problems behind the walls.
That's why we always recommend carrying out proper research before purchasing any renovation property. Also read our guide:
"The Biggest Mistakes People Make When Buying Property in Spain."
A House Doesn't Always Tell the Truth
A property may look perfect from the outside.
Yet after the purchase, hidden defects often begin to appear.
Common examples include:
- outdated electrical wiring;
- leaking plumbing;
- damp and moisture problems;
- structural cracks;
- woodworm or termite damage;
- asbestos in older homes.
One well-known case involved a Dutch buyer who discovered after completing the purchase that much of the wooden roof structure had been severely damaged by termites. Repair costs eventually reached hundreds of thousands of euros.
Unfortunately, situations like this are more common than many buyers realise.
Mistake Number One: Skipping a Building Inspection
Many buyers decide to save money by skipping a professional building inspection because the property "looks fine."
At first, this may seem like saving a few hundred euros.
In reality, that inspection could save you tens of thousands.
An independent surveyor can identify structural and technical issues that remain completely invisible to an untrained eye.
For that reason, a building inspection should never be seen as an unnecessary expense.
It is one of the smartest investments you can make before signing the purchase contract.
Mistake Number Two: Starting Without the Right Permits
After arranging a professional building inspection, the next important question is:
Are you actually allowed to carry out the renovation you have in mind?
Many buyers assume that once they own the property, they can immediately begin renovating. After all, it's their house.
Unfortunately, property ownership does not automatically give you permission to make every type of alteration.
For smaller projects such as painting, replacing a kitchen, or installing new flooring, extensive permits are often not required. However, permission may be necessary if you plan to:
- remove or relocate walls;
- build an extension;
- alter the roof;
- move doors or windows;
- install a swimming pool;
- convert a garage into living space;
- change the exterior appearance of the property;
- enlarge the existing building.
The required permits vary between municipalities and depend on the type and location of the property. Homes in historic town centres, rural areas, or apartment complexes may be subject to additional regulations.
Starting construction without the necessary approvals can lead to expensive delays, fines, or even an order to reverse completed work.
Before purchasing any property, make sure you understand not only what you want to renovate, but also what you are legally allowed to renovate.
Still deciding which type of property suits your plans? Read our guide:
New Build or Resale Property in Spain: Which One Is Right for You?
Municipal Approval Isn't Always Enough
Even if the local council grants permission, additional restrictions may still apply.
If you're buying an apartment, approval from the community of owners may also be required, particularly if your renovation affects:
- the building façade;
- shared plumbing or drainage;
- structural walls;
- balconies;
- terraces;
- external air-conditioning units;
- communal areas.
For rural properties, it's equally important to verify that all existing buildings and extensions have been legally registered.
A garage, guest house, outdoor kitchen or swimming pool may physically exist but still be missing from the official property records. This can create serious complications during future renovations, resale, or mortgage applications.
That is why every renovation property should be checked from both a technical and legal perspective.
Mistake Number Three: Choosing a Contractor Based Only on Price
A renovation property often looks attractive because of its low purchase price. Many buyers then focus on finding the cheapest contractor.
Unfortunately, the lowest quote is rarely the cheapest project.
A quotation may appear complete while excluding important items such as:
- demolition work;
- waste removal;
- permits;
- architect's fees;
- electrical installation;
- plumbing;
- flooring and tiling;
- painting;
- bathrooms;
- kitchen appliances;
- utility connections;
- taxes;
- final cleaning.
Some costs only become visible once walls, ceilings or floors have been opened. Old wiring may need replacing, leaking pipes may be discovered, or the roof structure may be in far worse condition than expected.
That's why every renovation budget should include room for unexpected expenses.
How Much Contingency Should You Allow?
There is no universal percentage that applies to every property.
A relatively modern home with a good structural report presents far less risk than an old finca that has received little maintenance over the years.
However, allocating every euro of your available budget to the renovation itself is rarely a good idea.
Keeping a financial reserve allows you to deal with:
- rising material prices;
- hidden structural defects;
- additional permit requirements;
- project delays;
- temporary accommodation;
- unexpected repairs.
Television programmes following people relocating to Spain regularly show renovation budgets disappearing much faster than expected. A permit turns out to be more expensive, the roof needs complete replacement, or a simple renovation suddenly becomes a major construction project.
This doesn't mean you should avoid renovation properties.
It simply means you shouldn't budget only for the best-case scenario.
For a complete overview of purchasing costs, also read:
Additional Costs When Buying Property in Spain
Mistake Number Four: Failing to Put Agreements in Writing
Many renovation problems begin with a friendly conversation.
The contractor visits the property, gives an estimated price, and says everything should be finished within a few months.
Because the relationship feels positive, detailed contracts are often overlooked.
However, when disagreements arise, verbal promises become extremely difficult to prove.
Always make sure the following is clearly documented:
- the exact scope of work;
- materials to be used;
- what is excluded from the quotation;
- responsibility for permits;
- project start date;
- estimated completion date;
- how changes are approved;
- payment schedule;
- warranty conditions;
- procedures for resolving defects.
Whenever possible, make payments in clearly defined stages linked to completed work.
Large upfront payments increase your financial risk if delays or disputes occur.
Always ask to see recent projects and confirm that the contractor is properly registered and insured.
Mistake Number Five: Expecting Spain to Work Like Your Home Country
Renovating in Spain isn't necessarily more difficult than renovating elsewhere.
However, communication, planning and working practices can be very different.
Many international buyers expect:
- highly detailed schedules;
- immediate email responses;
- guaranteed delivery dates;
- instant updates whenever delays occur;
- every detail to be documented.
Spanish construction projects often operate with a more flexible and personal style of communication.
Public holidays, summer heat, local festivals and material shortages can all influence project timelines.
Neither approach is better than the other.
Problems usually arise because expectations were never discussed clearly from the beginning.
Renovating From Abroad Increases the Risk
Many buyers continue living in their home country while renovations take place.
They receive occasional photos or short videos and assume everything is progressing as planned.
Unfortunately, photographs rarely reveal:
- what's happening behind walls;
- the quality of installed materials;
- whether plumbing and electrical work meets expectations;
- whether agreed dimensions have been followed;
- whether important tasks have been skipped.
If you can't regularly visit the property yourself, consider hiring an independent project manager or architect to inspect the work before each payment is released.
A real estate agent may help you purchase the property, but that doesn't automatically make them responsible for supervising the renovation.
Ensure every professional involved has clearly defined responsibilities.
A successful renovation begins long before construction starts.
That's why we also recommend reading:
The Biggest Mistakes People Make When Buying Property in Spain
When a Dream Project Slowly Falls Apart
Renovation projects rarely fail because of one major mistake.
Instead, they usually unravel through a series of small decisions:
- skipping the building inspection;
- ignoring permit requirements;
- underestimating the budget;
- accepting incomplete quotations;
- paying too much upfront;
- insufficient supervision;
- unclear expectations.
Each decision may seem harmless on its own.
Combined, they can delay a project by months and increase costs dramatically.
The good news?
Almost every one of these problems can be prevented with proper planning.
Part 3 – How to Make Your Renovation in Spain a Success
After reading the first two parts, one conclusion becomes clear:
Most renovation projects in Spain don't fail because of bad luck.
They fail because important decisions are made too late.
The good news is that most of these risks can be reduced—or even avoided—with proper preparation. Spending a little more time planning before you begin can save you months of delays and thousands of euros in unexpected expenses.
Start With a Realistic Plan
Many buyers fall in love with a property first and only then start thinking about the renovation.
Try turning that process around.
Before making an offer, ask yourself:
- What is the purpose of this property?
- Will it become my permanent home, a holiday home, or an investment?
- Which renovations are essential?
- Which improvements can wait until later?
- What is my maximum total budget, including unexpected costs?
The clearer your plan is from the beginning, the easier it becomes to compare contractors, estimate costs, and avoid expensive mistakes.
Inspect the Property Before You Sign
A professional building inspection remains one of the smartest investments you can make.
It provides valuable insight into:
- the property's overall condition;
- moisture and damp issues;
- the electrical installation;
- the roof structure;
- foundations and structural cracks;
- hidden defects that aren't visible during a viewing.
Combine this with a legal inspection carried out by an independent lawyer. This ensures that the property is not only structurally sound but also legally registered and free from unexpected complications.
Don't Choose a Contractor Based Only on Price
A low quotation may look attractive, but experience, communication, reliability and transparency are often far more valuable than saving a few thousand euros.
Always ask for:
- recent references;
- similar completed projects;
- a detailed written quotation;
- a realistic project schedule;
- warranty information.
A professional contractor will usually ask many questions before preparing a quotation.
That is often a good sign.
It shows they want to fully understand your project instead of simply offering the lowest price.
Use Clear Payment Milestones
Never pay the entire renovation cost upfront.
A much safer approach is to divide payments into clearly defined stages.
For example:
- project start;
- demolition completed;
- electrical and plumbing finished;
- interior finishing completed;
- final handover.
Always inspect each completed phase before releasing the next payment.
Be Realistic About the Timeline
Almost every renovation project encounters unexpected delays.
Building materials may arrive late.
Permits can take longer than expected.
Hidden structural issues may only become visible once work begins.
For that reason, always allow extra time in your planning.
If everything finishes ahead of schedule, that's a pleasant surprise.
Planning too optimistically, however, usually leads to unnecessary stress and disappointment.
Supervise the Renovation
Do you still live abroad while your renovation is taking place?
Don't rely solely on photos or WhatsApp updates.
Whenever possible, visit the property regularly or hire an independent project manager or architect to inspect the work on your behalf.
Small problems are far easier—and cheaper—to solve when they're discovered early.
Renovating in Spain Doesn't Have to Become a Nightmare
Stories about failed renovation projects receive plenty of attention.
Fortunately, thousands of successful renovations are completed every year.
The difference usually isn't luck.
The difference is preparation.
Buyers who work with experienced professionals, carry out proper inspections, verify legal documentation and plan their budgets realistically dramatically reduce the chances of expensive surprises.
How CasaOthers Can Help
At CasaOthers, we do more than help you find your dream property.
We also help you begin the buying process with the right preparation.
Through our trusted network of experienced local professionals—including real estate agents, lawyers, mortgage specialists and other experts—we help you avoid many of the costly mistakes that foreign buyers often make.
Because every successful renovation starts long before the first wall is removed.
Conclusion
Buying a renovation property in Spain can be one of the best investments you'll ever make.
But only if you look beyond the property's charm.
Check the technical condition.
Verify the legal status.
Work with reliable professionals.
Set realistic budgets.
Plan carefully.
By doing so, you'll greatly increase the chances that your renovation becomes a success story rather than an expensive lesson.
Frequently Asked Questions (FAQ)
Is a building inspection mandatory in Spain?
No. However, it is one of the smartest investments you can make before purchasing a renovation property.
Do I always need a permit for renovation work?
No. It depends on the type of work and the local municipality. Structural alterations usually require official approval.
How much contingency should I include in my renovation budget?
There is no fixed percentage. Older properties generally carry a higher risk of hidden defects, so maintaining a financial reserve is always recommended.
Is the cheapest contractor always the best option?
Not necessarily. Experience, references, communication and a detailed written quotation are usually far more important than the lowest price.
Can I manage a renovation project while living abroad?
Yes, but regular inspections or an independent project manager can significantly reduce the risk of costly mistakes and delays.
