Buying an Older Property in Portugal: 12 Things to Check Before You Buy
Buying an older property in Portugal? Check these 12 issues before you buy, from damp and roofs to alterations, paperwork and energy efficiency.
BUYING IN THE ALGARVE
Daniel and Bruna Rolph
10/14/20269 min read
Buying an older property in Portugal can be a very good decision. You may get a better location, more character, a larger plot or simply more house for your budget than you would with a newer property.
But age changes what you should be looking at.
A freshly painted wall can hide damp. A converted garage may look like perfectly usable accommodation but not match the approved plans. An attractive traditional house may have old electrics, ageing plumbing or a roof that needs considerably more attention than the photographs suggest.
That doesn't mean you shouldn't buy it. It means you should know what you're buying.
Here are 12 things we'd want a buyer to think about before committing to an older property in Portugal.
1. Does the property you are viewing match the paperwork?
This is one of the most important checks, and it's particularly relevant with older properties that have been extended or altered over the years.
Compare what physically exists with the registered and approved property information.
Has a terrace been enclosed? Has a garage become a bedroom? Is there an extension, annex, pool or outbuilding? Has the internal layout changed significantly?
Some changes may be perfectly legitimate. Others may not have been properly documented or licensed.
The Portuguese land registry records information about the property's legal position, including ownership and registered charges. Your lawyer should investigate the legal documentation and establish whether the property being sold corresponds with what has been properly registered and authorised.
This is exactly why we tell international buyers not to treat due diligence as a formality after they've already emotionally bought the house. It's one of the most important parts of the transaction.
Our step-by-step guide to the Algarve buying process explains where these checks fit into the wider purchase.
2. Are there signs of damp or moisture?
Damp deserves attention in an older Portuguese property, but don't assume every mark on a wall means the house has a major structural problem.
Look for:
bubbling or peeling paint
staining around windows or ceilings
mould in corners or behind furniture
musty smells
recently repainted isolated areas
deterioration around external walls
signs of water penetration around terraces and roofs
The important question is why the moisture is there.
It could be condensation and poor ventilation. It could be failed waterproofing, leaking plumbing, roof problems, drainage or moisture entering through an external wall.
Those are very different problems with very different costs.
If something concerns you, don't rely on guesswork. Get it properly investigated.
3. What condition is the roof in?
A roof is easy to ignore during a viewing because you're usually standing underneath it.
With an older villa or traditional house, we would want to understand its condition before buying rather than after the first serious winter rain.
Look for visible cracked or displaced tiles, sagging areas, staining on internal ceilings and evidence of previous leaks.
If there's roof access, use an appropriate professional to inspect it rather than climbing around yourself.
And don't just ask, "Does the roof leak?"
Ask when it was last repaired, whether any major work has been completed and whether there are invoices or guarantees available.
4. How old are the electrics?
An older property doesn't automatically need rewiring, but electrical systems deserve a closer look.
Over the years, houses can accumulate additional sockets, air-conditioning units, pool equipment, electric water heaters, kitchen appliances and other loads that weren't envisaged when the original system was installed.
During a viewing, you can look at the consumer board and general condition of visible switches and sockets, but this isn't something most buyers can assess properly themselves.
If the system appears old or you're planning substantial renovation, having an electrician inspect it can be money well spent.
The question isn't simply whether the lights switch on today. It's whether the installation is suitable and safe for how you intend to use the property.
5. What condition is the plumbing in?
Plumbing problems aren't always obvious during a 30-minute viewing.
Turn on taps. Check the water pressure. Flush toilets. Look under sinks. Look for staining beneath bathrooms and around water heaters.
Ask about the age of the hot-water system and whether any plumbing has been replaced.
With a property that has been extended, also try to establish whether bathrooms, kitchens or annexes were added later.
A beautiful new bathroom doesn't necessarily mean the pipes behind it are new.
6. Are cracks cosmetic or something more serious?
Small cracks in plaster are common and aren't automatically a reason to walk away.
But there is a big difference between minor surface cracking and movement that deserves professional investigation.
Pay more attention to cracks that are wide, diagonal, recurring, visible both inside and outside, or concentrated around doors, windows and structural junctions.
We wouldn't try to diagnose a structural issue ourselves, and neither should a buyer.
If something doesn't look right, get a qualified technical professional to assess it before you become contractually committed without adequate protection.
That's a recurring theme with older properties: spot the question first, then get the right person to answer it.
7. Have extensions, annexes and converted garages been properly dealt with?
This deserves its own check because it's something buyers can easily overlook.
Imagine you're viewing a three-bedroom villa with a separate guest studio created from the garage. That studio might be one of the reasons you love the property.
But before valuing it as additional legal accommodation, establish exactly what it is on paper.
The same applies to enclosed terraces, roof terraces, additional bedrooms, extensions, outdoor kitchens and other alterations.
This isn't about assuming there's a problem. It's about making sure the value you're placing on the property is based on what you're legally buying, not simply what you can see.
Your lawyer should check the relevant documentation, and more complicated discrepancies may require input from an architect or other technical professional.
8. How energy efficient is the property?
Older Algarve homes can perform very differently from modern ones.
The Portuguese energy certificate gives the property an energy-performance classification and should form part of your assessment. ADENE, which manages Portugal's building energy certification system, states that an energy certificate is required for property transactions.
But we'd also look beyond the letter on the certificate.
Check:
whether windows are single or double glazed
the quality of shutters and doors
insulation where this can be established
air-conditioning or heating systems
solar hot-water or photovoltaic systems
exposure to sun and shade
signs that rooms become particularly cold or damp in winter
International buyers understandably think a lot about keeping an Algarve home cool in August. If you're going to live here year-round, think about January too.
9. Where does the water come from and where does it go?
This becomes particularly important with rural and semi-rural properties.
Don't automatically assume every house operates exactly like an urban apartment.
Establish whether the property has mains water and mains drainage or uses systems such as a borehole, cistern or septic tank.
If there is a borehole or other private water source, understand what it supplies and ask for the relevant documentation and information about the equipment.
For septic systems, understand where the tank is, how it's accessed, how it's maintained and whether there have been any problems.
None of this necessarily makes the property undesirable. In parts of the Algarve, these arrangements can simply be part of rural property ownership.
You just need to know about them before you buy.
10. What will actually need replacing in the first few years?
This is where we think buyers should look beyond the purchase price.
Suppose two properties cost the same.
One needs little more than decorating. The other may soon need windows, air-conditioning, a water heater, pool equipment, waterproofing and electrical work.
They aren't really the same price.
When we view older properties with clients, we try to separate work into three categories:
Cosmetic: things you'd like to change.
Maintenance: things that will need doing because of normal age and wear.
Essential: things that need correcting because they affect the property's condition, safety or legal position.
That distinction can completely change whether a property represents good value.
11. What condition are the pool, terraces and outside areas in?
On an Algarve property, some of the expensive maintenance can be outside the house.
For a swimming pool, look beyond whether the water is blue on viewing day. Ask about the pump, filtration equipment, heating if fitted, lining or tiles, and any history of leaks or repairs.
For terraces and balconies, look for cracked surfaces, poor drainage, staining below them and signs of failed waterproofing.
Retaining walls also deserve attention, particularly on sloping plots.
A large mature garden can be a huge attraction, but understand its irrigation system, water requirements and maintenance needs too.
The outside space is part of what you're buying. Treat it with the same scrutiny as the kitchen.
12. Should you have an older Portuguese property professionally inspected?
If there are material concerns about the condition of a property, getting specialist technical advice before becoming fully committed can be a very sensible investment.
Portugal's buying process isn't identical to the UK or other countries, and international buyers shouldn't assume someone else is automatically carrying out a detailed physical inspection of the building for them.
Your lawyer's role is critical, but legal due diligence and a technical assessment of a building are different things.
A lawyer can investigate ownership, charges, documentation and legal issues. An architect, engineer, surveyor or relevant tradesperson can help answer technical questions about the physical property.
Sometimes you need both.
What documents should be checked when buying an older property in Portugal?
The exact documentation depends on the property, its age and circumstances, so this is an area for your lawyer rather than a DIY checklist.
Portugal's official Casa Pronta service identifies documents relevant to property transactions including the property's technical file where one exists, documentation concerning the existence or exemption of a use licence in applicable cases, and the energy certificate.
The land registry is another fundamental source. Portugal's Justice Ministry explains that the property register provides information on the legal status of property, including its composition, ownership and associated charges.
The practical point for a buyer is simple:
Don't just check that documents exist. Check that the documents describe the property you think you're buying.
That's particularly important with an older house that has evolved over several decades.
Is buying an older property in Portugal a bad idea?
Not at all.
Some of the properties we'd personally be most interested in buying are older ones.
They can offer established locations, mature gardens, larger plots, character and opportunities to improve something rather than paying a premium for somebody else's renovation choices.
But an older property needs to be assessed as a whole.
A dated kitchen is obvious and easy to price.
An undocumented extension, persistent water ingress or a major structural problem is very different.
The trick is not finding a property with absolutely nothing wrong with it. That's unrealistic, particularly with an older house.
It's understanding what is wrong, what it will cost to deal with, and whether the price you're paying properly reflects it.
That's a much better basis for making an offer.
Frequently Asked Questions
How old does a property need to be before I should worry about its condition?
There's no particular age at which a Portuguese property suddenly becomes risky. Maintenance history matters just as much as the year it was built. A well-maintained older villa may require considerably less work than a newer property that has been neglected. Look at the actual condition, alterations and documentation rather than making a decision based purely on age.
Should I get a survey when buying a house in Portugal?
A technical inspection isn't the same thing as your lawyer's legal due diligence. If the property is older, has visible defects, has undergone substantial alterations or you're planning a major renovation, specialist technical advice can be very worthwhile. The appropriate professional will depend on the issue — for example, an architect, engineer or relevant specialist contractor.
Who checks whether alterations to a Portuguese property are legal?
Your lawyer should review the legal and property documentation as part of due diligence. Where the physical building doesn't appear to correspond with the documentation, an architect or other appropriate technical professional may also need to investigate the planning and licensing position. Don't assume an extension is authorised simply because it has existed for many years.
Is damp common in older Algarve properties?
Moisture issues can occur, particularly where ventilation, waterproofing, roofs, terraces or external walls have problems. What matters is identifying the cause. Condensation, a plumbing leak and failed terrace waterproofing can produce similar-looking symptoms but require very different solutions. Visible damp should prompt investigation rather than an automatic decision either to buy or walk away.
Does a Portuguese lawyer check the physical condition of the house?
A lawyer's primary role is legal due diligence, not a detailed technical inspection of the building. They can investigate ownership, registered charges, licences and documentation, but technical concerns about structure, roofing, damp, electrics or other physical elements may require an appropriately qualified technical professional.
Can I buy a property if an extension isn't shown correctly in the paperwork?
Potentially, but you first need to understand exactly what the discrepancy is and the consequences of it. Don't make assumptions about whether an alteration can simply be regularised later. Your lawyer and, where necessary, an architect should establish the position before you make a decision based on the additional space.
Is an energy certificate required when buying property in Portugal?
Portugal operates a mandatory building energy-certification system, and ADENE states that an energy certificate is required for property transactions. The certificate is useful, but buyers of older homes should also physically consider windows, insulation, heating and cooling systems, orientation and the property's likely year-round comfort.
What's the biggest mistake buyers make with older properties?
Treating visible renovation costs as the whole story.
A buyer will usually notice an old kitchen or dated bathroom immediately. The bigger questions may be behind the walls or in the paperwork.
We'd rather discover those questions while you're deciding what the property is worth than after you've bought it.
Thinking about buying an older property in the Algarve?
Older properties can represent excellent value when you know what you're looking at.
As a husband-and-wife team working with Portuguese and international buyers across the Western Algarve, we help clients compare properties objectively, identify questions worth investigating and bring the appropriate professionals into the process when needed.
If you're looking at an older villa, apartment or renovation project and want a second pair of eyes on the buying process, you're welcome to talk to us.
Daniel & Bruna Rolph
Team Rolph Properties | Century 21
Helping international and Portuguese buyers and sellers across the Algarve.
