What actually drives the cost of painting a house
Every painter gets asked for a number before anyone has seen the house. Here is what that number is actually made of, so you can read a quote properly and tell a thorough one from a cheap one.
4 min read
Why nobody honest will price it over the phone
The first thing worth saying is that a painter who gives you a firm price without seeing the place is either guessing high to protect themselves, or guessing low and planning to find the rest later. Neither is useful to you.
Two houses with identical floor plans on the same street can be genuinely different jobs. One has sound walls and one has cracked plaster through the hallway. One has a side path wide enough to carry a ladder down and one does not. Those differences are not details — on a whole-house job they are most of the difference in the final figure.
What you should get on the phone is a rough sense of whether the job is in the right ballpark for you, and an appointment. What you should get after a proper look is a written scope that says what is being done to which surfaces.
Preparation is the line item that moves the most
Painting itself is fairly predictable. A wall takes about as long to coat as any other wall of the same size. What varies enormously is what has to happen before the first coat goes on.
A sound, previously painted interior wall might need a wash, a light sand and a fill of a few nail holes. The same wall with lifting paint, an old patch that was never sanded flat, or a settlement crack running through it is a different proposition entirely — and if it is skipped, the new coat prints every one of those problems straight back through within a season.
This is why two quotes for the same house can differ so much. It is often not the paint or the labour rate; it is that one quote includes the preparation and the other assumes it away. When you compare quotes, compare what they say about preparation first and price second.
Access is a real cost, not an excuse
How easy it is to physically reach a surface changes how long it takes to paint it, and on some houses it changes it a lot.
A single-storey house on a flat block with a driveway and clear side access is about as straightforward as exterior work gets. A terrace with no front setback, where gear has to stand on a public footpath and pedestrians have to get past all day, is not. Neither is a house on a steep block where the rear elevation is three storeys down from the street, or a cottage with a side path too narrow to carry gear and ladders through.
None of that is anyone's fault and none of it is padding. It is the reason a quote should come after someone has walked around your house rather than after they have looked at photos.
Scope: what is actually included
"Painting the interior" can mean very different things. Walls only is one job. Walls and ceilings is a bigger one. Walls, ceilings, doors, architraves, skirtings and window reveals is bigger again, and trim work is slow — there is far more cut-in per square metre than a wall has.
The same is true outside. An exterior quote might cover the walls, or it might cover the walls, fascia, barge boards, gutters, downpipes, eave linings and the front door. Those are not the same number.
A quote that names the surfaces lets you make choices. You might decide the walls can wait a year but the fascia cannot. You cannot make that call against a single lump sum with no breakdown behind it.
The number of coats, and what a coat is worth
Coats matter, but not in the way the question usually implies. Going from a proper job to an extra coat on top of it gains you less than people expect. Going from a proper job to a rushed one loses you far more.
What decides how many coats a surface actually needs is what is underneath it: how absorbent it is, how big the colour change is, and whether it has been sealed. A strong colour going over white, or white going over a strong colour, will genuinely need more. A like-for-like repaint over a sound existing finish often will not.
Be wary of a quote that leads with a coat count and says nothing about preparation. The coats are the visible part; the part underneath them is what decides how long they last.
What to ask before you accept a quote
Ask which surfaces are included, by name. Ask what preparation is included and what happens if more is found once the old coating comes off. Ask what is not included — most honest quotes have exclusions, and the ones that pretend otherwise tend to produce awkward conversations later.
Ask who is actually doing the work and how many days it is expected to take. Ask what happens at the end of each day: whether the site is cleaned down or left set up.
And ask what the painter would do if it were their house. Most tradespeople will tell you honestly which parts of a job are worth doing now and which can wait — and the answer tells you a lot about whether you are talking to someone who wants the whole job or the right job.