It’ll cost you between $500 and $1,000 to paint the exterior yourself. Not including paint, it’ll cost you no more than $200 to $300 at a home improvement store like Home Depot, Lowes or Menards. You may end up spending more if you buy high-quality products from specialized shops. Professionals can get the same supplies for about half what you’ll pay.
Begin prepping your walls by removing any outlet covers or lighting fixtures (if possible). Next, inspect your walls for any defects. If you encounter cracks, dents, or holes in your walls, simply fill them in with caulk or spackling compound. There are also a number of DIY tips to fill nail holes. Once your repairs dry, smooth them down with sandpaper and wipe the walls down with a damp sponge.
While you may choose to paint a door, ground-level window trim and other parts of your house’s exterior, it’s really a job best left to the professionals. One of the main reasons is experience. An experienced painter knows how to handle the prep work, spot problems and identify sources of future trouble, all while getting the job done more efficiently. They are also experienced with spending long hours on tall ladders. If you want high-quality work, it’s best to hire a professional painter near you. 
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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.
Painting exterior windows depend on the size of the window and the number of panes. To calculate the price for windows larger than 15 sq. ft., add 1’ to each side of the window and then multiply width x length. Add two sq. ft. for each window pane for painting the mullions, muntins, and sash and then multiply your total sq. ft. by $84/100 sq. ft. So a 4’ x 4’ window with 4 panes will come to a total of 44 sq. ft. x $84/100 sq. ft. = $37.
Do the cleanup. When the painting is done, send the painter home and do the cleanup work yourself. This will include rolling up drop cloths and collecting scrapings, removing painter's tape (use a hair dryer on low heat to soften the adhesive), cleaning paint brushes, rollers, and other tools, replacing electric switch plates, outlet covers, and light fixtures, and sealing any leftover paint cans and storing them in a dry, temperature-controlled location.

Painting interior walls does not require professional aptitude, but it is still a skill that arrives with a learning curve. The most challenging part of any interior painting project is the prep work, which often involves cleaning the walls, masking off windows, doorways and baseboards, then carefully “cutting in” the paint around the edges. Once the masking and cutting in are finished, volunteers with handheld or roller brushes can usually fill in the rest of the space with little trouble.

You’ll spend between $500 and $3,000 or $1 to $3.50 per square foot to paint concrete. However, expect to pay $2 to $7 per square foot since concrete almost always needs a coat of primer first. Double that price if the concrete requires stripping. Concrete is porous. Sealing it not only helps blend foundations and walls with your home’s aesthetic, but also seals it against water. Repairing or resurfacing concrete costs $300 to $500 for every 100 square feet.
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