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Additions and ADU in London

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Home Additions and ADU in London, Ontario

Adding square footage to your London 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.

Rear and Second-Storey Additions

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.

Accessory Dwelling Units (ADUs)

Ontario's updated zoning legislation has made it easier than ever to add an ADU to a London 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.

The Addition Process in London

  • Feasibility and Zoning Review — we verify permissions for your specific London property
  • Architectural Design and Engineering — permit-ready drawings and structural specs
  • Municipal Permitting — all permits filed with London building department
  • Foundation, Framing, and Exterior — complete structural construction
  • Interior Finishing and Occupancy — through to occupancy permit

Our addition teams work throughout London, including Byron, Old North, Old South, Westmount, Hyde Park, Masonville, and all surrounding communities.

Home Addition Services in London

Adding onto your existing home in London 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 Middlesex County. Every addition we build is engineered, fully permitted, and constructed to the same structural standards as new construction.

Home additions in London are subject to the City of London 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.

ADU and Secondary Suite Options in London

Accessory Dwelling Units (ADUs) — detached garden suites and attached secondary units — are increasingly in demand across Middlesex 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 London zoning requirements and Ontario Building Code standards. Call us at 226-407-0348 to discuss ADU options for your specific property in London.

Frequently Asked Questions — Additions and ADU in London

How long does a home addition take in London?

A single-storey rear addition in London 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 London typically takes 4–8 weeks, which we factor into the schedule from day one.

Does a home addition require a permit in London?

Yes — all home additions and ADUs in London 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.

Can you build a detached ADU in London?

Yes — where permitted by local London zoning, we design and build fully permitted detached ADUs (garden suites) throughout Middlesex 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.

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London Renovation Experts operates throughout London, St. Thomas, Strathroy, Woodstock and surrounding communities across Southwestern Ontario.

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