Residential
Home Addition in Perth County
A home addition in Perth County runs $110 to $255 per square foot depending on finish level, and it is new construction: foundation, framing, roof, and envelope, tied cleanly into the house you already have.
What you get
One general contractor. Every trade. One price.
- Foundation recommendation: slab, crawlspace, or full basement under the addition, priced against each other.
- Roof tie-in detailing so the addition reads as original, not bolted on.
- Electrical panel and furnace load check before we quote, so service upgrades are in the price, not a change order.
- Permits and zoning setback review through the relevant Perth County township.
- All trades under one project manager, from excavation to paint.
- Fixed-price line-item quote within a week.
- One-year workmanship warranty.
Who this is for
The buyer this page is written for.
Homeowners in Listowel, Atwood, Milverton, Mitchell, and rural Perth County adding a main-floor bedroom, family room, or in-law suite. Typical trigger: the family outgrew the house, but the lot, the location, or the mortgage rate makes staying smarter than moving.
How it works
Five steps from site visit to handover.
- 01
Site visit and scope
We come to the property, take measurements, and document the existing structure. You walk us through what you want and the constraints (budget, timeline, must-haves).
- 02
Written quote within a week
You receive a line-item quote with a fixed price for each scope area, a proposed schedule, and the trades who will run each phase. No verbal estimates.
- 03
Permits and selections
We pull the permits. You finalize finish selections from a shortlist we prepare. Anything you bring (appliances, fixtures, custom millwork) gets logged into the schedule.
- 04
Build and inspection
One project manager owns your file from demolition through final inspection. Weekly walkthroughs. Photos at the end of every workday on request.
- 05
Walkthrough and warranty
Final walkthrough at completion. Deficiency list closed within 30 days. Workmanship warranty on labour for one year, manufacturer warranties pass through to you.
What it costs
How we price the project.
A home addition in Perth County runs $110 per square foot at a standard finish, $165 at premium, and $255 at luxury. A 400 square foot addition at premium finish is about $66,000 for the shell and finishes; roofline and services tie-ins are priced per project. Written range within 24 hours of the site visit.
Want a number before the site visit? Run your square footage through our free home addition cost calculator. It uses the same regional rates we quote from.
Why us
Licensed general contractor in business since 2000. Fully insured, WSIB compliant, and COR certified. Office in Listowel, Ontario — work delivered across Southwestern Ontario and the GTA.
Next step
Tell us about your project.
Send us the scope. We reply within 24 hours with a written range and the next available site visit.