Room Additions
Expand your Ottawa home with a professionally built room addition including foundation, framing, roof tie-in and full mechanical integration.
Find an Addition ContractorAbout Room Additions
Single-storey room additions are one of the most popular ways Ottawa homeowners expand their living space, adding family rooms, bedrooms, home offices or playrooms to existing homes. Every room addition in Ottawa requires a new foundation with footings extending below the 1.2 to 1.5-metre frost line to prevent heaving during our extreme winters.
The project involves excavation, foundation pouring, framing, roof tie-in to the existing structure, insulation meeting Ontario Building Code energy requirements, and extending your HVAC, electrical and plumbing systems. A City of Ottawa building permit is required, and in heritage conservation districts like the Glebe or Sandy Hill, you may also need heritage approval for exterior changes.
Most Ottawa room additions are completed within 10 to 16 weeks during the primary building season from May through October, though foundation work can begin earlier if frost conditions permit.
What's Included
- New foundation with frost-line footings (1.2-1.5m deep)
- Structural framing and roof tie-in to existing home
- HVAC ductwork extension and electrical panel assessment
- Full insulation meeting Ontario Building Code requirements
- Interior finishing including drywall, flooring and trim
- City of Ottawa building permit coordination
Other Addition Services
Second-Storey Additions
Add a full or partial second storey to your Ottawa home with structural engineering, foundation assessment and complete construction management.
Bump-Out Extensions
Extend your Ottawa room by 2-15 feet with a bump-out addition including foundation, structural integration and exterior matching.
In-Law Suite Additions
Build a self-contained in-law suite addition in Ottawa with separate entrance, kitchen, bathroom and full fire separation per Ontario Building Code.
Sunroom Additions
Add a three-season or four-season sunroom to your Ottawa home with proper insulation, glass selection and heating for extreme winters.
Garage Conversions
Convert your Ottawa garage to finished living space with insulation, HVAC, electrical upgrades and Ontario Building Code compliance.
Kitchen Extensions
Expand your Ottawa kitchen with a rear or side extension including structural modifications, utility relocation and full finishing.
Ready to Get Started?
Contact us today for a free estimate on your room additions project. We'll connect you with experienced addition contractors in Ottawa.