OUTDOOR LIVING
How to Estimate a Porch Enclosure
Contractor method for estimating porch enclosures: area, material and the new-build line.
Porch enclosure bids fail on the material and whether it's new. Screening an existing porch and building a new enclosure are very different jobs that grow the quote fast.
THE SHORT ANSWER
How do you estimate a porch enclosure?
Measure the area, choose the enclosure level (screen $15, three-season $75, insulated four-season $225/sq ft), then apply the new-build factor. A 200 sq ft screen enclosure runs about $3,000.
Measure the porch
Measure the porch area in sq ft and note the existing structure. A new build needs framing and roofing that an enclosure of an existing porch does not.
- Measure the enclosed area
- Check the existing roof and framing
- Note the screen or glazing preference
- Confirm local wind and building code
Choose the enclosure level
Screen runs ~$15/sq ft, a three-season enclosure ~$75 and insulated four-season glass ~$225. These are different assemblies, not merely different frame materials.
Price new builds
A new build adds ~30% over an enclosure of an existing porch. Use the Porch Enclosure Cost Calculator to build the full quote, then add any electrical or lighting.
Check the total
Your total should land within 10% of the calculator output before markup. Confirm the permit covers a new structure if you're building from scratch.