The Average Cost to Build a Porch

Size

• The size of your porch greatly affects its cost. A small, do-it-yourself porch costs $50 to $2,000, as of 2010, according to Cost Helper. Larger porches that require foundations start about $15,000.

Types

• You will spend much less on a basic, concrete-slab porch vs. a larger, screened-in porch or sunroom. Prefabricated porches cost approximately $10,000 to $20,000, while a custom porch built by a contractor can cost $45,000, according to Cost Helper. If you plan on using the porch a lot for guests and parties, you may want to spend more on a screened-in porch with a solid foundation.

Features

• Features such as porch furniture, customized pillars, railing and other interior and exterior decor will increase the cost of your porch. Also consider how sturdy the porch should be, and order materials accordingly. For example, if you get heavy snow during the wintertime, you'll need a thicker roof and insulated walls.

  You may also have to pay for building permits, if required by your municipality.