Licensed renovation contractors serving St. Thomas and the surrounding Elgin County. Expert craftsmanship, free quotes, zero obligation.
Adding square footage to your St. Thomas home is one of the most significant renovation projects you can undertake. Whether you're building a rear addition, adding a second storey, constructing a garage suite, or developing an accessory dwelling unit (ADU), London Renovation Experts has the experience and expertise to deliver a seamless, high-quality result.
Single-storey rear additions typically add 300–600 square feet to the main floor. Second-storey additions can effectively double your home's square footage while keeping the same lot footprint. We handle all foundation engineering, structural framing, roofing, exterior cladding, and complete interior finishing.
Ontario's updated zoning legislation has made it easier than ever to add an ADU to a St. Thomas property. We handle the full ADU process — from zoning verification and permit applications through construction and occupancy — including all required utility connections and building code compliance.
Our addition teams work throughout St. Thomas, including Downtown St. Thomas, Elgin Mall Area, Dalewood, Orchard Park, Mitchell Hepburn, and all surrounding communities.
Adding onto your existing home in St. Thomas is one of the most cost-effective ways to gain living space without the expense and disruption of moving. London Renovation Experts designs and builds single-storey rear additions, two-storey additions, bump-outs, sunroom additions, garage conversions, and detached accessory dwelling units (ADUs) throughout Elgin County. Every addition we build is engineered, fully permitted, and constructed to the same structural standards as new construction.
Home additions in St. Thomas are subject to the City of St. Thomas zoning bylaws, lot coverage limits, and Ontario Building Code structural requirements. Our team conducts a zoning review before quoting every addition project to confirm feasibility — then handles all architectural drawings, structural engineering coordination, permit submissions, and inspections from start to finish. You have one contact for every stage of the process.
Accessory Dwelling Units (ADUs) — detached garden suites and attached secondary units — are increasingly in demand across Elgin County as homeowners look to generate rental income or house family members. London Renovation Experts builds fully permitted, self-contained ADUs that comply with all City of St. Thomas zoning requirements and Ontario Building Code standards. Call us at 226-407-0348 to discuss ADU options for your specific property in St. Thomas.
A single-storey rear addition in St. Thomas typically takes 10–16 weeks from permit approval to completion. Two-storey additions and larger projects run 16–24 weeks. Permit approval from the City of St. Thomas typically takes 4–8 weeks, which we factor into the schedule from day one.
Yes — all home additions and ADUs in St. Thomas require a building permit. Permits require complete architectural drawings, structural engineering, and zoning compliance review. London Renovation Experts manages the entire permit package and all required inspections at no extra charge.
Yes — where permitted by local St. Thomas zoning, we design and build fully permitted detached ADUs (garden suites) throughout Elgin County. We conduct a zoning review before quoting to confirm your property qualifies, then manage all approvals and construction from start to finish. Call 226-407-0348 to discuss your property.
London Renovation Experts operates throughout London, St. Thomas, Strathroy, Woodstock and surrounding communities across Southwestern Ontario.