Small surfaces, slow work
Repainting a room's walls is mostly rolling. Repainting its trim is almost all cutting-in: baseboards, door frames, window casings, crown molding and doors with panels and edges. It's detail work, done with a brush, close to floors and glass, and it takes more time per square foot than anything else in a house. That's why trim and doors are often priced as a separate line, or as their own job when the walls are fine.
How painters count it
Expect a quote to be built on:
- Linear feet of baseboard and crown, sometimes with a note on profile: a tall, detailed baseboard takes longer than a plain one.
- Doors, counted one by one, with both faces and the edges. Six-panel doors take longer than flat slab doors.
- Door frames and casings, counted per opening.
- Window casings, stools and aprons, and sashes if you want them painted.
- Built-ins and stair parts, such as railings, spindles and stringers, which add many edges.
Prep is where the hours go
Trim catches every bump and is usually painted in a glossier finish that shows every flaw. Before the first coat, a good crew will:
- Clean off grease and grime, especially on door edges and around handles.
- Fill nail holes, dents and gaps, and sand them flush.
- Caulk gaps between trim and walls.
- Scuff-sand glossy old paint so new paint can grip.
- Spot-prime any bare wood or fillers.
The oil-based question
Many older houses have trim and doors painted with oil-based enamel. Water-based paint applied straight over it can peel off in strips. To change over, a crew will usually de-gloss and sand, then use a bonding primer made for the switch. A simple test, rubbing a hidden spot with a solvent, can tell which you have. Ask the painter whether they plan to test and how they'll handle a switch; it's a common reason one quote is higher than another.
Doors on or off
Doors can be painted in place or taken off and laid flat, which gives a smoother finish but takes longer and leaves the opening without a door for a while. Hardware is either masked or removed. Ask which method is priced.
Finish and number of coats
Trim and doors usually get a satin or semi-gloss enamel; the right sheen depends on how much wear the surface sees. Two coats are common, with primer where needed. A waterborne alkyd or another hard enamel levels well and cures harder, but may cost more and take longer between coats. The paint sheens and finishes guide compares options.
Protecting floors and glass
Trim work happens right against floors, carpet, tile and glass. Expect masking of floors with tape and drop cloths, and either masking or careful scraping of window glass. That's labor that should appear in the quote.
Lead on windows, doors and trim
Old windows and doors are among the places in a house most likely to carry old lead paint, because they rub and wear. Under EPA's Renovation, Repair and Painting Rule, since April 22, 2010 firms doing renovation, repair or painting that disturbs lead-based paint in homes built before 1978 must follow lead-safe work practices. That means containment, cleanup and no dry sanding of old paint without controls, and it's real work that belongs in the price.
EPA runs the RRP program in states it has not authorized; Alabama, Delaware, Georgia, Iowa, Kansas, Massachusetts, Mississippi, North Carolina, Oklahoma, Oregon, Rhode Island, Utah, Vermont, Washington and Wisconsin run their own EPA-authorized programs. Before old trim is sanded, you can ask whether the firm holds RRP certification and how it will set up the room.
Comparing trim quotes
Put each proposal side by side and check:
- What's counted: doors, frames, casings, baseboards, crown, windows, stairs.
- Prep: filling, caulking, sanding, priming.
- The plan for oil-based trim, if any.
- Doors on or off; hardware removed or masked.
- Product, sheen and coats.
- Floor and glass protection and cleanup.
Our interior painting page and the pricing guide explain more about how interior work is priced.