Designing a Home on a Narrow (25 Foot or Less) Toronto Lot

On a 25-foot Toronto lot, the stair, dining table and route to the garden compete for a limited width. A successful custom home or major renovation resolves those relationships early, while there is still room to move walls and reconsider the plan.

Narrow infill properties elsewhere in the GTA raise similar questions. On each site, side setbacks, existing conditions and wall assemblies determine the interior width available to the household.

Find the width you can actually use

For a new home, work from the applicable zoning envelope. For a renovation, measure the existing building and confirm which walls and setbacks can lawfully remain under the proposed scope. Include finished wall thicknesses in the study.

The kitchen and dining furniture help establish the space needed for everyday movement. A kitchen aisle needs to work when an appliance door is open. A dining chair needs space behind it. These ordinary movements are useful tests of a narrow floor plan.

Give the stair a deliberate position

A side stair may allow a longer room beside it. A central stair can separate front and rear living areas and bring roof light towards the middle of the house. Each arrangement affects the floors above and below.

Test landings and headroom in section, together with beams and duct routes. A stair that looks compact on the main-floor plan can create a difficult bedroom or corridor upstairs. Resolving the whole stack helps avoid that trade-off.

Storage can sit beside the stair or within adjoining millwork where the geometry permits. Coat storage near the entrance and pantry space near the kitchen save repeated trips through the house.

Give the middle of the house a use and a source of light

Deep plans often have bright rooms at each end and a darker centre. That central area might accommodate a stair, bathroom or storage, leaving living rooms closer to exterior windows. A roof opening over the stair may provide another source of daylight.

Consider sightlines as well. An aligned opening can connect the entrance to the garden, while a partial wall or cabinet screens kitchen clutter or provides a defined space within the otherwise open floorplan. Long views can make compact rooms feel more open without giving up every place to retreat.

Compare retention with replacement at the same scale

A renovation may preserve a useful building position and a street-facing room you value. It can also inherit a low basement or stair that requires substantial work. Draw both options to the same level of detail if the choice remains uncertain.

In custom home design, these relationships can be established from the outset. In a major renovation, the work begins by deciding which existing elements will support them. Either approach should leave you with a plan whose rooms work at their finished dimensions.

Explore homes on narrow Toronto lots

See how these ideas take shape in Haus L34 on a lot measuring 18 feet 10 inches wide and Sky View Haus on a 20-foot lot. Haus H46, zero79 and Haus A36 each occupy a 25-foot lot.

Plan a narrow-lot project

Compare custom home design with renovation and addition design. A Pre-Design Study can test the property’s constraints before a design direction is fixed.