Why trim is priced on its own
Walls are flat and fast. Trim is narrow, detailed and everywhere: baseboards, door casings, window casings and sills, crown molding, chair rail, stair skirts and the doors themselves. A painter can roll a wall in minutes and then spend far longer cutting in the baseboard beneath it. That's why many proposals list trim and doors as separate lines, and why a trim-only job can take longer than people expect.
This guide explains what sets the cost of that work, without quoting prices.
Measuring the job
- Linear feet of trim. Baseboard and casing are usually measured by the run. Tall or built-up baseboards with several profiles take longer per foot.
- Number of doors. Flat slab doors are quicker than six-panel or shaker doors. Both faces and all edges count.
- Windows. Casings and sills are one thing; painting the sashes themselves, with their muntins and glass edges, is slower and more careful work.
- Special pieces. Stair balusters, newel posts, wainscoting and built-in shelving add detail.
Getting new paint to stick
Old trim is often glossy oil enamel. Water-based paint applied straight over it can peel off in strips. Prep that adds time but protects the result:
- clean off hand grease, especially on door edges and around knobs;
- scuff-sand every glossy surface, or use a bonding primer;
- fill dents and nail holes, sand them flush and spot-prime;
- re-caulk gaps where trim meets walls and where casing joints have opened;
- prime any bare wood.
Our surface preparation guide covers patching and sanding in more depth.
Lead rules for trim in older Oregon homes
The Oregon Health Authority says that in 2010 EPA authorized Oregon's Construction Contractors Board and OHA to administer and enforce the lead Renovation, Repair and Painting rule instead of EPA. The rule covers renovation, repair and painting work in pre-1978 homes, with minor repair and maintenance, disturbing less than 6 square feet of paint per room or less than 20 square feet outside, excluded.
EPA's own list agrees: it runs the program in states it has not authorized, and names Oregon among the states that run their own EPA-authorized programs.
Trim work is detailed and spread across every room, so on a pre-1978 house it's worth asking the painter how much paint the job will disturb in each room and how the crew will handle it. Lead-safe containment, when it's used, shows up in the price: plastic over floors and furniture, sealed doorways, dust-limiting sanding methods and a careful cleanup. Ask whether that setup is included, and how the crew sands glossy trim without spreading dust.
Doors: in place or off the hinges
Doors painted in place stay in use but show brush marks and need careful edges. Doors taken off and sprayed come out smoother, but the room goes without a door for a day or two, and hinges and hardware need removing and rehanging. Either is fine; the proposal should say which.
Product and sheen
Trim and doors usually take an enamel in satin or semi-gloss, which wipes clean and resists scuffs. Waterborne alkyd and urethane-modified enamels level well and harden more than wall paint, but need longer between coats. Our sheen guide explains the choices.
Color changes
Going from stained wood to paint, or from dark to white, takes a primer and often an extra coat. Stained wood can also bleed through light paint unless sealed with a stain-blocking primer. Expect this to add a line on the proposal.
Scheduling around daily life
Fresh trim enamel stays soft for a while. Baseboards get kicked, doors get closed onto damp edges, and pets brush against casings. Ask the painter how long each area must be left alone, and plan which rooms stay usable.
Comparing proposals
Lay out linear feet, door count, window sashes, the prep steps, primer, enamel, method and containment plan side by side. For the wider picture, see interior painting and our pricing guide.