On average, expect to pay between $150 and $300 per square foot for sunroom costs. A small 8-foot by 10-foot sunroom costs around $4,000 to $6,000, but a 12-foot by 20-foot sunroom might average ...

Yes, You Can Add Additional Square Footage to Your Home With Amazon’s DIY Sunroom Kits. Story by Alicia Geigel • 6mo. ... Domi 10-Foot x 12-Foot Wall Mounted Sunroom. $3100.