Why can three quotes for the same house vary so much?

The variation rarely comes down to the professional's profit. Each quote interprets differently what is included (materials, preparation, number of coats, handling of unexpected issues). A detailed quote and a generic one may point to the same final work, but with very different levels of risk for the owner.

Is a quote per square metre always indicative?

Yes, because two surfaces with the same area can be in very different conditions. Cracks, moisture, peeling paint or poorly prepared walls turn an initial quote into a distant reference. The final price can only be confirmed after assessing the real condition of the walls, either through photos and videos or a visit.

What happens if problems not anticipated in the quote arise?

It depends on what is written in the agreement. A serious quote specifies how unexpected issues are handled: if there is room for adjustment, if additional costs need to be approved before proceeding, or if the price is fixed regardless of what comes up. On the platform, all job details remain visible online for the customer, the professional and the platform, reducing the space for misunderstandings.

Is it worth asking for quotes from more than three professionals?

Three well-detailed quotes are enough to understand the real price range and identify outliers (abnormally low or high values). Asking for five or six proposals rarely brings new information and can delay the decision. The most important thing is to ensure that the quotes are comparable: same preparation, same number of coats, same type of paint.

How do I know if the final price will actually be the one in the quote?

If the quote was made after the professional saw the house (through photos, videos or a visit), if it details preparation and materials, and if it specifies how unexpected issues are handled, the final price should match the quoted amount. Vague quotes or based only on useful square metres leave room for adjustments that rarely benefit the owner.

Reading a painting quote: what changes the price

Receiving three painting quotes for the same house and discovering that the values vary by more than 50% is not an exception. It is the rule. The good news is that this variation rarely means that someone is trying to deceive the owner. It means that each quote is telling a different story about what is included, about the real state of the walls and about the risk the professional is willing to take.

Understanding how to read a painting quote is not about memorizing price tables. It is about recognizing the signals that explain why the final number can double without the painted area changing a square centimetre.

What is really included in the price per square metre

When comparing quotes that vary from 4€ to 18€ per square metre 1, the first question is not "which is the cheapest", but "what is each one counting".

Labour only vs complete service

The difference that weighs most in an interior painting quote is whether materials are included: labour alone runs from 4€ to 8€ per m², while with preparation and paints included it rises to 10€ to 16€. A quote that lists "painting at 6€/m²" with no further details may mean only the application of paint, leaving sanding, filler, primer and the paints themselves to the owner.

In Lisbon or Porto, preparation alone (sanding, minor repairs, filler and primer) can represent between 3€ and 8€/m² additionally, depending on the condition of the surfaces.

Surface preparation: the line that almost no one reads

Walls in good condition mean smooth surfaces, without cracks, without moisture and with the previous paint adhering well. Real walls rarely fit that description, especially in older apartments in Coimbra, Braga or Setúbal.

When the quote mentions "basic preparation" or "preparation as needed", it is leaving room to adjust the price after seeing the walls up close. A serious quote specifies:

Light or complete sanding
Application of filler (how many coats)
Anti-moisture primer or standard primer
Treatment of cracks or areas with mould

Without these details, the initial number is just a starting point.

Ceilings: additional effort that is not always itemized

Painting ceilings costs more than painting walls, even if the area is identical. The price per square metre ranges from 5€ to 15€ for interior walls, while for ceilings it rises slightly, from 8€ to 18€, given the additional effort.

A quote that presents a single price per m² for walls and ceilings may be compressing costs or preparing to request an adjustment when the work begins.

Factors that inflate the quote without increasing the area

Factor	Price impact	When it appears in the quote
Visible moisture or mould	+30% to +80%	"Moisture treatment" line or "specific primer"
Structural cracks	+20% to +50%	"Crack repair" or "deep preparation"
Previous paint peeling	+15% to +40%	"Removal of loose paint" or "scraping"
Dark or intense colours (more than two coats)	+10% to +25%	"Additional coats" or "special coverage"
Difficult access or high ceiling	+20% to +60%	"Scaffolding" or "work at height"

These elements rarely appear as separate lines in a first quote based only on square metres and photographs. This is why our platform always asks for photos and videos of the surfaces before closing any proposal 2, so that the final number reflects reality and not an optimistic estimate.

State of the walls: the silent multiplier

Cracked walls, with moisture or peeling paint need repairs before painting, which can include plastering, sanding or applying primer, increasing the cost 3. A room of 20 m² of walls can cost 160€ if it is flawless, or 400€ if it has moisture stains, active cracks and loose paint.

In coastal areas like Faro or Matosinhos, exposure to salt and maritime humidity accelerates paint degradation, making preparation more demanding and the quote heavier.

Number of coats: rarely explicit, always relevant

A "standard" quote generally assumes two coats of paint over a prepared base. Painting white over white may be sufficient with two coats. Painting a dark grey wall white, or vice versa, may require three or four coats for uniform coverage.

Each additional coat represents about 20% to 30% extra cost in labour and materials. If the quote does not specify how many coats are included, the risk of surprise at the end is real.

How to compare quotes that seem incomparable

Receiving three proposals with very different values is not a sign of an unregulated market. It is a sign that each professional is interpreting the job differently.

Checklist for reading quotes

Material included? Paint, primer, filler, protective tape, plastics. If the quote says "with materials", it should list which paint (brand, range, finish).
Detailed preparation? Sanding, crack repair, filler application, primer. "Preparation as needed" is not enough.
Number of coats? Two is the standard, but it should be written. Dark colours or radical shade changes require more.
Ceilings included? Separate price or in the same price per m²? Ceilings cost more.
Protection and final cleaning? Cover furniture, protect the floor, remove tape, clean splashes. It seems obvious, but it is not always included.
Timeline and phasing? How many days, if there are interruptions, how access to the house works during the work.

If two quotes differ by 40% but one includes moisture treatment, three coats and premium paint, while the other lists only "interior painting", the difference is not in the professional's profit but in the risk each one is willing to take.

Price by property type: practical references

Painting a 2-bedroom apartment typically costs between 1,000€ and 2,000€, and a 3-bedroom between 1,400€ and 2,200€; the area to be painted is almost always larger than the living area of the apartment, as a 2-bedroom of 55 m² useful space has 80 to 100 m² of walls.

This difference between useful area and paintable area is one of the main points of confusion. When someone says "I have a 2-bedroom of 60 m²", they are talking about the floor. The walls and ceiling easily add double that area.

In Viseu or Leiria, where the housing stock is more recent, walls tend to be in better condition, pushing quotes towards the lower range. In historic neighbourhoods of Lisbon or Porto, preparation is almost always more demanding, raising the final value.

Warning signs in a painting quote

Not every cheap quote hides bad intentions, but some patterns deserve attention.

Fixed price without seeing the house or without detailed photos. The platform always asks for photos and videos to avoid quotes based on assumptions.
"First quality materials" without specifying brand or range. "Good" paint can mean the economic range of a known brand or the mid-range of an unknown brand.
Complete absence of timeline or phasing. Open-ended work rarely finishes when the customer expects.
100% advance payment. On our platform, the model is always 50% at the start and 50% at the end 4, after verifying the result.
Quote valid for only 48 hours. Pressure to decide quickly rarely benefits the owner.

What to do before accepting a quote

A well-read quote is a quote that can be compared fairly. Before choosing:

Ask for clarifications in writing. If something is not clear ("basic preparation", "as needed"), ask for details.
Confirm what happens if unexpected issues arise. Moisture not visible in photos, cracks hidden by furniture: who pays?
Check that the professional is registered. The platform always confirms that the professional is duly registered before presenting them as an option.
Understand how payment and warranty work. Phasing, accepted payment methods, what the warranty covers (touch-ups, adhesion problems, etc.).

On Madeira or in the Azores, where the transport of materials can increase the cost of the service, confirming whether the quote already includes those costs avoids last-minute adjustments.

Reading a painting quote: what changes the final price