Additions & Extensions

When a house is right but too small, an addition changes the equation: a rear extension for a bigger kitchen, a second storey for more bedrooms, a converted garage, or a separate laneway house or garden suite where zoning allows. Additions are construction projects in the fullest sense โ footings, framing, roof, envelope โ attached to a home you're still living in.
Every addition needs a building permit, and most start earlier than people expect: with zoning setbacks, lot coverage rules and, in many urban lots, a committee-of-adjustment application before drawings are even finalized. Our quotes treat the approvals path as part of the project, not an afterthought, because in Ontario the paperwork often sets the schedule more than the construction does.
Home Addition
Plan a home addition in Ontario: permit and zoning basics, what the build includes, and the factors that drive cost. Get a straightforward quote.
Second-Storey Addition
Second-storey additions in Ontario: engineered foundation review, permits, staged inspections and the factors that set cost. Plan the top-up properly.
Rear Extension
Rear extensions for Ontario homes: permits, rear-yard setbacks, footings below frost depth, and what drives the price of building out the back.
Garage Conversion
Converting a garage to living space in Ontario means a change-of-use permit, insulation upgrades and parking checks. See scope, cost factors and FAQs.
Sunroom Addition
Sunroom additions in Ontario: three-season vs four-season builds, permits, foundations and glazing โ plus the factors that change the price.
Laneway House
Laneway house design and build in Ontario: zoning feasibility, servicing, emergency access and tree rules โ what to check before you commit.
Garden Suite
Garden suites in Ontario: backyard ADU bylaws, servicing, tree protection and emergency access, plus the factors that decide what a build involves.
Also available by quote
Need additions & extensions work?
Describe the job โ big or small โ and get a free quote.