The cost to paint a room will vary based on the size of the room, the type of paint you select, any ceiling or trim work needed, and any repairs needed. If no repairs or other additional work is needed, painting a room with contractor-grade paint could range from $1 to $2 per square foot, including materials. Selecting a luxury paint (some cost more than $100 per gallon) will certainly increase your house painting costs. Here are some additional examples of average house painting costs, per room:

wall Painting Design

Prep before you paint. Make sure to stock up on all the paint supplies you'll need to finish your project. Get enough tarps to cover all your furniture and electronics. Acrylic paints are water based, so they clean up easily and dry fast. Duct tape always comes in handy. Create your own look by mixing two sheens to stripe the wall with paint, or use large format stencils to create a pattern. We can do your paint project for you or do it yourself. If you need a paint sprayer, you have the option to but also consider renting one from us.

I'm an architect and my firm routinely specifies interior finishes for projects so I thought I'd contribute a professional's perspective on the issue of how many coats of paint are deemed "acceptable". The fact of the matter is the average consumer usually isn't a paint expert and can't be expected to know about all the factors that impact coverage. That knowledge is considered "means and methods" and in a court of law, the responsibility lies with the painter or general contractor, not the consumer. What the consumer should be concerned about is the final result-does it look good and is it what you expected? The simplest way to communicate this to your painter is to stipule in your written agreement that the number of coats will be "as required to cover". That way all the guess work about what kind of primer, how many coats, how color affects the scope of work, etc., is removed from the consumer's responsibility and resides where it belongs-with the professional. In the contract that's why retention is always a good idea-typically 10% is withheld from payment until the job is completed to the satisfaction of the customer. Of course in return you as the customer have to be reasonable about what constitutes a completed job. Just my $.02.
Meet the pros. Call in at least three different contractors for your job. (Friends and family are good reference sources.) And be home for the initial meeting with them. That way, you’ll know how much time each contractor took to assess the condition of your home. The longer he takes, the more realistic the estimate you’ll get. Even an experienced painter will need more than a quick walk around your house. http://youtube.com/watch?feature=player_embedded&v=b6_WEt9k_Hw
^{Yes the pricing does change, and quite significantly. I have worked inside the paint industry on counter sales outside sales and application for over 10 years. One thing many people do not understand is, the resins in the paint are more expensive to produce the higher the sheen goes. Therefore the company is at of higher cost making the paint, which in terms they charge more for the paint. I have seen a 15$ variance between flat-semi-gloss it is not uncommon and is not unrealistic to pay more for a higher sheen. Another thing to add is when doing samples on your wall prior to a painter coming is a good idea, however do not do them in huge squares with heavy coats, remember you are just wanting an idea. A lot of times the issue comes up of the paint not covering the sample coats, in fact it is covering quite well, however the paint sample applied is often times much darker than the wall color, creating a contrasting difference from the lighter surrounding wall and the sample placed on the wall. I recommend getting a piece of sheet rock and using it for the samples so you can move around with it etc.}
When selecting a color scheme for the home’s exterior homeowners can choose color options that will correct flaws that they may feel exist with their home and property. Some examples include utilizing two shades of a single color to make a home appear appropriately sized when the home may be too large or too tall. To accomplish this effect individuals will want to place the darker tone on the upper level of the home’s exterior. Smaller windows can appear more proportionately sized by trimming them in a lighter tone of paint. Darker colors make a space or feature appear smaller. The same effect can be obtained for homes positioned further away from a curb. By using lighter tones the home will not feel camouflaged.