When requesting painting estimates, the first question that usually comes up is always the same: how many square metres is it? The logic seems straightforward - area determines cost. But practice shows it is not that simple. Two 2-bedroom apartments with 70 m² can receive estimates ranging from €900 to €2,200, and neither figure is wrong. The difference is not in the space, it is in what that space requires.
The condition of surfaces changes everything before the first tin of paint is opened
A smooth, well-maintained wall requires little more than light sanding and two coats of paint. Painting new walls is not the same as repairing cracks, treating mould or changing dark colours, so the value must be assessed based on the actual surface condition. A house in Coimbra or Aveiro that has been closed for months may show moisture stains, mould in corners or peeling paint. Fixing this requires scraping, applying blocking primer, filling cracks and only then painting.
In an apartment in Lisbon or Porto with degraded walls, labour typically represents 60 to 70 per cent of the total cost of interior painting. When there is intensive preparation work, that figure can rise. The required time increases, material consumption goes up and the risk of unexpected issues grows. This is why a wall with problems costs more than a new wall, even if they have exactly the same area.
When an estimate is requested based solely on square metres, without seeing the actual condition of the surfaces, there is a high probability of surprises during the work. That is when unexpected additional costs appear, unforeseen by neither the owner nor the professional. Avoiding this requires ensuring that the painter sees the space before confirming the price, whether through detailed photographs and videos or a visit.
Ceilings, edges and finishes multiply execution time
Painting 50 m² of plain wall in a spacious room is not the same as painting 50 m² spread across three small bedrooms, a narrow hallway and a bathroom with tiles halfway up the wall. The more rooms, doors, windows, skirting boards and switches there are, the more time the professional spends on protection, edging and finishing. That time counts in the final estimate.
Ceilings are another overlooked factor. Often, when talking about painting an apartment, people think only of the walls. But ceilings represent a considerable area and require different technique. Application is more difficult, the risk of marks and roller patterns is greater and the painter's physical fatigue increases. For this reason, painting ceilings has a higher cost per square metre than walls.
A typical 2-bedroom apartment in Setúbal or Leiria might have between 80 and 100 m² of wall and ceiling area combined, even though the usable area of the apartment is only 60 or 65 m². When the estimate is based only on the usable area of the home, the discrepancy is immediate. The owner imagines one figure, but the painter is calculating based on the actual surface to be painted, which is significantly larger.
Whether material is included or not makes more difference than it seems
There are two estimate models: labour only or full service with materials included. In the first case, the owner buys the paint, primer, fillers, sandpaper and the professional simply executes. In the second, the painter supplies everything. The price difference between the two can be 30 to 50 per cent, but the risk and responsibility also shift.
When materials are supplied by the owner, there is always the risk of buying insufficient paint, choosing an unsuitable product for the surface type or purchasing incompatible primer. If the paint does not cover well, if there is not enough halfway through the job or if the finish is not as expected, responsibility becomes divided. The painter can claim the problem was with the materials, and the supplier can say the application was incorrect.
With materials included, the professional takes on the entire chain. They choose suitable paint, calculate the correct quantity, ensure product compatibility and are responsible for the final result. The cost is higher, but it eliminates many variables. For an apartment in Braga or Viseu where the owner does not know paint brands or does not have time to go and compare products, the full service can be the safest solution, even if it costs more upfront.
Colour change and number of coats alter paint consumption and work time
Painting a white wall white is quick. Painting a dark blue wall white requires at least three coats, plus colour-blocking primer and more drying time between applications. Paint consumption doubles or triples, execution time does too. The estimate reflects this.
In older houses in Porto, Faro or in interior villages, it is common to find walls painted in strong colours from the 1980s or 1990s. Changing those colours to neutral tones requires extra preparation. The same happens when painting over old wallpaper that has been removed: the surface becomes uneven, absorbent and needs to be sealed before receiving paint.
The type of finish chosen also has an impact. Matt paint hides imperfections better but is less resistant to cleaning. Satin or washable paint costs more, requires better wall preparation and highlights any surface flaws. For an owner who wants an apartment ready to let in Lisbon or Porto, the choice of finish can vary the final estimate by 15 to 20 per cent.
Location, access and logistics weigh on the final cost
A ground-floor apartment with direct access from the street is easier to work on than a fourth-floor flat with no lift in an old building in Mouraria or Ribeira in Porto. Moving materials, setting up protection, managing dust and noise in occupied buildings requires more care, more time and sometimes more people on the team.
In Lisbon and Porto, prices tend to be 15 to 25 per cent higher than national averages. This difference is not just a matter of demand. It reflects the cost of travel, parking, tighter schedules and greater finish requirements. In a market where rental is competitive, owners want work done quickly and well, and that has a cost.
In coastal areas like Faro, Matosinhos or Costa da Caparica, salt and moisture in the air accelerate paint degradation. When painting interiors in those regions, it is wise to use more resistant products, which also pushes the price up. It is not a luxury, it is about matching the materials to the real environment where the house is located.
What to do to get a realistic estimate from the start
Requesting a painting estimate based only on square metres is like requesting a car repair estimate by only stating the make. Essential information is missing. The ideal is to provide detailed photographs of walls, ceilings, corners, problem areas and clearly state what you want: paint walls only, include ceilings, change colours, apply two or three coats.
On our platform, all estimate requests include sending photographs and videos. This allows the professional to assess the actual condition of the surfaces before presenting a price. It avoids surprises, reduces the risk of extra costs during the work and ensures that the price presented reflects the actual work to be done. The estimate moves from a generic estimate to a proposal tailored to your specific case.
After receiving the estimate, it is worth confirming what is included: number of coats, type of paint, surface preparation, protection of furniture and flooring, final cleaning. A complete estimate lists these items. A vague estimate leaves everything open and increases the risk of misunderstandings later. The clearer the initial agreement, the lower the probability of conflict at the end.
