The average cost to paint the interior of a house or room is $1 to $3 per square foot. Painters charge $1,200 to $3,900 to paint the walls in a house interior, and the cost to paint a room is $350 to $850. Prices increase when including the ceilings, baseboards, and trim. Get free estimates from interior painters near you or view our cost guide below.
Carefully consider the gloss level. The shiny gloss paints are easy to clean, but will make any wall blemish stand out. The flat paints will help disguise wall blemishes, but can be difficult to clean. Generally, you'll want glossier paints where there's lots of steam or cooking (baths and kitchens) and in high-traffic areas. Flatter paints are preferred for large walls and ceilings.
Prep work should include removing all loose paint, either with a pressure washer or by scraping; removing any trace of mildew using bleach and water or a commercial solution, and sealing or covering dark stains; caulking all seams, corners and around windows or trim; applying epoxy filler to repair serious woodwork problems; covering dark stains; sanding all rough surfaces, and priming the bare wood with a bonding primer.
From dull to shiny finishes, paint comes in several different lusters. A paint’s luster depends on its mixture of pigment, resin, and additional ingredients. If you’re struggling to decide what finish you want, note that glossier finishes tend to be more durable and washable. Flat paint, on the other hand, is better at hiding surface imperfections. Pearl and eggshell lusters fall somewhere in the middle, as they are more washable than flat paint and partially hide irregularities.

The Ceiling. For ceilings, flat is recommended, except semigloss or satin should be used in bathrooms with showers/tubs. Some customers opt to go with a different finish for ceilings in general, to create a specific design look, i.e. high gloss ceilings on dining room tray ceiling to make a statement, or eggshell ceilings throughout to look modern and make a statement. 
Paper drop cloths: $3 to $5 for 9x12-feet. Paper drop cloths provide a cheap way to cover furniture or windows while painting small, indoor jobs, such as touching up window trim. They're absorbent and textured to hold paint. When you're finished, you can just fold them up and throw them away. However, paper cloths are not the best option for protecting floors since they can tear easily.
When determining the total cost of a home’s exterior project, you’ll want to include things like the trim, a garage, foundation, windows and doors. All work is calculated by square footage and sometimes by the linear foot, such as in the case of trim. Your contractor will give you a price for the entire project unless you specifically ask for each item separately.
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