Egress Windows Hamilton | Installation

Q: What size does an egress window need to be in Hamilton?

Egress windows Hamilton must meet Ontario Building Code requirements. A basement bedroom egress window requires a minimum unobstructed opening of 0.35 square metres (3.77 sq ft) with a minimum width of 380mm (15 inches) and minimum height of 380mm (15 inches). The sill height cannot exceed 1000mm (39 inches) from the finished floor. BaseWorks installs to OBC minimums and recommends larger openings for practical use and natural light.

Q: Do egress windows require a permit in Hamilton?

Yes. Egress window installation Hamilton requires a building permit from the City of Hamilton. The permit covers the structural modification of the foundation wall (cutting the opening) and the window installation. BaseWorks manages the permit application process as part of every egress window project.

Q: How much do egress windows cost in Hamilton?

Egress window installation Hamilton typically costs $3,500 to $7,000 per window including foundation wall cutting, window supply and installation, window well installation, and backfill. Cost depends on foundation wall type (poured concrete vs block vs stone), wall thickness, window well depth required, and permit fees. BaseWorks provides a fixed-price written quote after a free site assessment.

Q: Do I need an egress window to rent out my Hamilton basement?

Ontario Building Code requires egress windows in basement sleeping rooms. A basement apartment or basement bedroom that lacks a code-compliant egress window cannot be legally used as a bedroom. Hamilton requires an egress window that meets the minimum opening requirements for any room that will be used as a sleeping area.

CODE REQUIREMENTS

Egress Windows Hamilton - Ontario Building Code Minimums

For a basement room to legally qualify as a sleeping area, its egress window has to clear Ontario Building Code minimums - opening dimensions, sill height off the floor, and accessibility from inside without tools or keys. Every install is done to code, with the City of Hamilton permit process managed on your behalf.

Structural lintel installation, waterproof flashing, and a matching window well are all included in every project - none of that gets treated as an upsell.

We manage the entire permit process ourselves, from the initial building permit application right through to final inspection with the City of Hamilton.

Every window we install meets OBC minimum opening requirements for a legal basement bedroom, without exception.

The size requirement is based on unobstructed open area - the space actually available when the window is fully open, not just the frame dimensions. Most standard basement windows fall short of that minimum, which is exactly why egress installation means cutting a new, larger opening into the foundation wall rather than just swapping the window.

Requirement	OBC Minimum	BaseWorks Standard
Unobstructed opening area	0.35 m² (3.77 sq ft)	0.50+ m² where feasible
Minimum opening width	380 mm (15 in)	550 mm+ recommended
Minimum opening height	380 mm (15 in)	600 mm+ recommended
Maximum sill height from floor	1000 mm (39 in)	Grade dependent
Window well clear width	760 mm (30 in) minimum	900 mm+ for comfort
Window well depth below sill	Equal to window height + 200mm	300 mm+ drainage gravel
Hardware	Openable from inside without tools	Casement or awning style

Egress windows Hamilton - window frame installation in freshly cut foundation wall

New egress window opening cut through concrete block foundation wall in a Westdale-area semi-detached home. Structural lintel installed above opening before window setting.

Egress windows Hamilton - completed window flooding basement with natural daylight

INSTALLATION PROCESS

How BaseWorks Installs Egress Windows in Hamilton Foundations

Every project follows the same structured sequence, built specifically to protect the foundation wall's structural integrity while a new opening gets cut into it.

Assessment and Permit

Window location gets chosen based on foundation wall type, grade height, and interior layout, and the City of Hamilton building permit is applied for before any work begins.

Lintel Installation

A structural steel or precast lintel goes in above the proposed opening before any cutting starts - that lintel is what carries the wall load once the opening is cut.

Foundation Wall Cutting

A diamond-blade saw and core drill cut the opening to OBC minimum dimensions, removing concrete or block sections and cutting and reinforcing rebar as required.

Window Installation

A new casement or awning egress window gets set into the rough opening, with flashing, air barrier, and insulation installed around the frame to code.

Window Well and Drainage

A galvanized or polyethylene window well gets set against the foundation over a gravel drainage bed at least 300mm deep, then backfilled and secured in place.

City Inspection

A City of Hamilton building inspector confirms the window meets OBC requirements, the permit closes, and the room is now legally code-compliant as a sleeping area.

FOUNDATION WALL TYPES

Egress Window Cutting in Hamilton's Foundation Wall Types

Three primary foundation wall types show up across Hamilton, and each one calls for a different cutting technique.

Poured Concrete (Post-1960)

The most common type in homes built from the 1960s onward. The monolithic concrete wall gets cut with a diamond blade saw, with rebar locations identified by ground-penetrating radar beforehand to avoid weakening the wall. A structural lintel is required above every opening.

Concrete Block (1940s-1960s)

Hollow or solid concrete blocks mortared in courses. Cutting follows the block courses where possible to minimize waste and preserve wall integrity - block walls need careful lintel sizing since they carry distributed load through the mortar joints.

Stone (Pre-1940)

Rubble or cut stone foundations show up in Hamilton's older homes, with highly variable thickness and no reinforcing to speak of. These require careful hand cutting and substantial lintel support - a structural engineer's assessment is recommended before cutting into stone at all.

Egress Window Hamilton - Installed Price

$3,500 - $7,000

Priced per window, covering the building permit, foundation wall cutting, structural lintel, window supply and installation, window well, drainage gravel, and backfill. The exact number depends on foundation wall type, wall thickness, and required window well depth - fixed-price and written, after a free site assessment.

COMMON QUESTIONS

Egress Windows Hamilton FAQ

What Hamilton homeowners ask most before booking an egress window install.

What size does an egress window need to be in Hamilton?

Every egress window has to meet Ontario Building Code requirements: a minimum unobstructed opening of 0.35 square metres, with minimum width and height of 380mm each, and a sill height no higher than 1000mm from the finished floor. We install to those minimums and typically recommend going larger for practical use and natural light.

Do egress windows require a permit in Hamilton?

Yes - a City of Hamilton building permit is required, covering both the structural modification to the foundation wall and the window installation itself. We manage that permit application as part of every project.

How much do egress windows cost in Hamilton?

Typically $3,500 to $7,000 per window, covering foundation wall cutting, window supply and installation, window well, and backfill. The exact figure depends on foundation wall type, wall thickness, required window well depth, and permit fees - every quote is fixed-price and written, after a free assessment.

Can I add an egress window to a poured concrete wall?

Yes. Cutting into poured concrete requires a diamond-blade core drill and cutting saw, done with precision to avoid cutting reinforcing bars, and a structural lintel has to go in to carry the load above the new opening. We use the right concrete cutting equipment and install the correct header before the window ever gets set.

How long does egress window installation take in Hamilton?

Typically 1 to 2 days for a single window in a standard poured concrete or block foundation - the opening gets cut, the window installed, the well set, and the exterior backfilled. A structural lintel adds time to that timeline depending on the size of the opening.

Do I need an egress window to rent out my Hamilton basement?

Ontario Building Code requires an egress window in any basement sleeping room. A basement apartment or bedroom without a code-compliant egress window can't legally be used as a sleeping area - any room intended as a bedroom needs a window meeting the minimum opening requirements.

Egress Windows
Hamilton

Egress Windows Hamilton - Ontario Building Code Minimums

How BaseWorks Installs Egress Windows in Hamilton Foundations

Egress Window Cutting in Hamilton's Foundation Wall Types

Egress Windows Hamilton FAQ

Egress Window Installation Across Hamilton

Make Your Basement Legal and Bright

Egress WindowsHamilton

Egress Windows Hamilton - Ontario Building Code Minimums

How BaseWorks Installs Egress Windows in Hamilton Foundations

Egress Window Cutting in Hamilton's Foundation Wall Types

Egress Windows Hamilton FAQ

Egress Window Installation Across Hamilton

Make Your Basement Legal and Bright

Egress Windows
Hamilton