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.
One of the first considerations when it comes to interior house paint is the base. There are two schools of thought, each with their pros and cons. Some brands commonly sold to contractors for commercial projects are oil-based, meaning the chosen pigment is mixed with an oil derivative called alkyd. Oil-based paint provides thorough coverage, and the finished coat resists moisture well. However, oil-based paint releases a high level of volatile organic compounds (VOCs) as it dries, and it can only be removed from floors, brushes, and clothing with strong chemical paint thinners. In fact, many states have actually banned the use of oil-based paints because of their VOC levels and hazardous ingredients.
However, some water-based paints are easier to work with than others. The first coat of paint may not provide complete wall coverage, or the color may not be quite as saturated. Some of these problems can be addressed with a separate primer coat, but this is a time-consuming project. The ideal solution is using a higher-quality paint that combines a primer and a finish paint in a “one coat” product.
Containing either natural oils or a synthetic alkylate, oil-based paints are more durable than latex paints. Oil-based paints should be used on surfaces where you want the finish to last for a long time. While this kind of paint has a stronger odor and takes longer to dry, its durability is unmatchable. The strength of oil-based paints makes them a great choice for moldings and trims.
If you are painting for a client, skip the paint in the bucket, and use large trays. For faster completion and still quality results the 5 gallon bucket and strainer work great as well as a wood filler, 5-in-1 tool, screw gun (drill), metal joint compound tray, metal putty knife, wide drywall knife, mini hand-held paint containers (for brushes), and a mini-roller and corresponding nap (for edging, after cutting in with brush on the bottom, top and sides of wall, and the sides of ceilings, so that you don't see brush lines).
Remove any outlet covers or lighting fixtures (if possible). Then scrutinize the walls for any defects. Simply fill them in with caulk or spackling compound if you encounter cracks, dents, or holes in your walls and trims. There are also tips and tricks for filling nail holes. Once done with the repair, smoothen the wall down with sandpaper and then wipe it with a damp sponge.

According to Craftsman National Estimator, "High time difficulty factors for surface preparation and painting. Painting takes longer when heights exceed 8' above the floor. Productivity is lower when an application requires a roller pole or wand on a spray gun or when work is done from a ladder or scaffold. When painting above 8', apply the following factors:

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.
Most house painting professionals will agree that two coats of paint are needed on a home. Using one coat of paint may look sufficient, but will not hold up over time. Two coats of paint, on the other hand, provide protection, washability, and help retain the true color of the paint. If you are still toying with the idea of hiring a professional painter, ask if two coats of paint are included in the pricing estimate.
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.
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.

Whether you decide to do the preparation work yourself or have a professional do it as part of your project, proper preparation makes all the difference in creating a smooth and lasting finish. Do it correctly the first time or you’ll quickly end up spending more to fix peeling and chipping paint. Follow this process before starting on your home's exterior. Keep in mind that the process may vary based on your siding materials:
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