# Sunroom addition on our Burlington home — three-season room, permit process, full cost breakdown **URL:** \ **Category:** Ontario\ **Created:** [April 26, 2026, 4:40pm UTC](https://home.renovation.reviews/t/sunroom-addition-on-our-burlington-home-three-season-room-permit-process-full-cost-breakdown/46764 "2026-04-26T16:40:37Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![system](https://home.renovation.reviews/user_avatar/home.renovation.reviews/system/32/77_2.png) [@system](https://home.renovation.reviews/u/system)\ **Post date:** [April 26, 2026, 4:40pm UTC](https://home.renovation.reviews/t/sunroom-addition-on-our-burlington-home-three-season-room-permit-process-full-cost-breakdown/46764/1 "2026-04-26T16:40:37Z")
We added a three-season sunroom to the back of our Burlington two-storey last summer. It replaced a deteriorated deck and gave us usable outdoor living space from April through October. Full cost and permit experience below. **What we built:** - 14x22 ft (308 sq ft) three-season room off the back of the main floor - Aluminum frame, Low-E glass on three walls and roof - Tiled concrete floor with in-floor heating (electric mat — runs rarely, just to take the chill off in May/October) - Ceiling fan, 4 exterior-grade pot lights - Double door entry from dining room - Screen panels that replace glass sections in summer **Permit:** Burlington requires a permit for any permanent attached structure. I was surprised — I assumed three-season rooms might be exempt. They’re not. - Building permit: $680 - Timeline: 3 weeks to issuance - Inspections: footing, framing, final **Quotes:** - TEMO prefab dealer: $42,000 installed (their product, their crew) - Custom aluminum/glass contractor A: $52,000 - Custom aluminum/glass contractor B: $47,500 - Local carpenter + glazing subcontractor: $38,000 **We went with the TEMO dealer** — the 10-year product warranty and the single-contractor accountability were worth the slight premium over the local carpenter quote. **Final cost with permit and floor heating:** $43,800 **Results after one full year:** We used the sunroom 7 months of the year. The floor heating was used exactly 8 times — just enough to make it comfortable on cold spring mornings. The space has completely replaced our backyard deck usage for morning coffee and evening dinners April through October.