IF the average cost is $1700 to paint an interior, then that means the cost of paint is approx. $200 (12% of the job).  Or better said 5 gallons of paint (if the average cost is $40 retail).  The average room takes 1.5 gallons which will cover 3 average rooms.  Doesn't sound to average to anyone with knowledge of this industry or a average house.  You are misleading consumers and should do a better job in your research.  No wonder so pay people think prices to get work done by professionals is high.  Its not high, its actually average which is more like $3700.

The graph says the average cost to paint a home interior is $1600; at the high end, $4,000. But for what size home? I'm getting estimates for painting an 1800 square foot townhome in the range of about $6500 - which includes sanding and repainting all doors, and painting all trim, walls and ceilings. What does the range above include and for how big of a home? Thanks.
If you paint over dirty, oily surfaces, the paint will easily chip or peel off. So before painting, clean grimy areas with a deglosser or heavy-duty cleaner intended for prepaint cleaning. They work well to clean painted, varnished or enameled surfaces to improve the adhesion of the new paint. They’re ideal for cleaning greasy or oily areas like kitchen and bathroom walls and removing hand marks around light switches and doorknobs.
Thanks, all, for your time & efforts adding to the article & comments, especially Dave urging requesting both General Liability AND Worker Compensation insurance certificates to protect from real & fraudulent liability--from my experience especially in California, where insurance fraud is a popular income thief, even causing car collisions to collect.
A paint job with low- or zero-VOC (volatile organic compounds) paints can help improve the air quality in your home. VOCs are solvents that get released into the air as the paint dries. They can aggravate allergies and asthma, and cause headaches, dizziness, respiratory illnesses, and memory impairment. By using paints with a low- or zero-VOC, you can reduce air-borne pollutants, smelly odors, toxic fumes, and mildew and mold growth in your home.
"Cutting in is an acquired skill, but it's something you can't do at all with a ratty brush," says Doherty. When cutting in on a wall, he loads his brush and spreads out the excess paint, then works the brush up to the line between wall and ceiling. A brush stroke that's too wide creates a hatband, or smooth brushed band, on the very top of the wall where it meets the ceiling. To avoid this, Dixon recommends rolling first and then cutting in with a brush. "A good roller can get within 1/2 inch of the ceiling," he says. "You'll save time by not brushing more then you have to." When painting baseboards, "a wide taping knife makes a good paint guard," says Span. "Just keep the blade clean to prevent drips from working around the edge of the knife."
Even an old lamp with a bare bulb held close to a wall will make minor cracks, bumps or nail pops jump out. Carmen Toto, owner of C. Toto & Sons in Madison, New Jersey, uses painter's putty or a lightweight spackle for minor cracks and dents; he uses plaster of Paris for dents deeper than 1/8 inch. Instead of the standard tape-and-spackle method for bridging over recurring stress cracks, Maceyunas uses a rubberized spray-on primer called Good-Bye Crack. Damaged wood requires a slightly different approach. "Don't use spackle on wood," says Toto, "because it just won't stick." For damaged trim, he uses painter's putty or a two-part wood filler, such as Minwax's High Performance Filler. Smooth any repairs, bumps, and nibs with a drywall pole sander. For smoother walls and better adhesion, some of our pros sand all previously painted walls regardless of the shape they're in.
Second: all the tricks of the trade in regard to "cheating" customers is for hustlers and cheaters and NOT established businesses. At the end of the project the job should come out looking professionally painted as specified in the contract. A selected color that takes multiple coats that was not calculated by the contractor should cost more money. It's not the fault of the painter.
Work with a professional painting contractor. If you haven’t done so already, sign on to work with a painting company near you. As part of a professional team, you’ll learn the tricks of the trade and work in a variety of different environments, both commercial and residential. There’s no better way to accumulate practical experience than to do it on the job.[8]
Work with a professional painting contractor. If you haven’t done so already, sign on to work with a painting company near you. As part of a professional team, you’ll learn the tricks of the trade and work in a variety of different environments, both commercial and residential. There’s no better way to accumulate practical experience than to do it on the job.[8]

Once you’ve decided on a house painting project, you’ll need to choose your color. There’s no set rule here to guide you. The wide variety of colors to choose from, and the combinations that are available when it comes to trim, doors, and other extras, make this choice mostly a personal one. One of the best ways to get pointed in the right direction is to drive around your town and neighborhood looking for homes that catch your eye. Try to figure out what it is about them that turned your head. Maybe they did something you didn’t like (i.e. stay away from that color, style, look, etc.), maybe the color combinations really speak to you (a light body with dark trim or vice versa), and maybe it’s just how they accented certain parts of the house that you like. Make note of all these things so that you can keep them in mind as you get your own house painting project underway.
Over 60 years ago, Graco invented the first portable airless paint sprayer and we’ve been innovating ever since to deliver the high performance and maximum productivity you need to grow your business. Whether you’re a contractor focused on small residential or a large contractor tackling the biggest projects every day, we have a configuration that’s designed to meet your needs. Graco airless sprayers are designed and built in the United States of America using the highest-quality parts and backed by the industry’s leading warranty. All Graco sprayers are 100% factory-tested and field-proven so you can be sure your money is going toward the best professional paint sprayer you can purchase.
When I had my interior painting done, after clearing out all of the furniture, myself, I also removed all of the wall plates in all the rooms to be painted. They were a beige color and probably yellowed. The wall was originally an off white and I had it painted a light-mid grey, so those wall plates would look terrible. After pricing replacement plates, switches and outlets (Would have been way too expensive to replace all of them), I decided to just paint all of the wall plates, switches and outlets (Used just a black gloss spray paint). I sprayed the plates outside and used a small brush on the switches and outlets. It worked out just fine and the blacks plates, etc compliment the wall color. It has been 7 years and the plates, switches, outlets are holding up well. 

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