A walkout basement entrance in the GTA costs $15,000 to $25,000 all in — permits, excavation, concrete work, doors and railings included. $15,000 covers a single-door entrance into an 8-foot-ceiling basement with standard concrete walls and railings; the top of the range, around $25,000, gets you double doors and a 9-foot ceiling, which requires a thicker foundation. Walkout, separate entrance, side entrance: different names, same project.
Two configurations cover nearly every GTA home. Both prices are complete — there is nothing to add for permits, inspections or construction:
Pricing confirmed by Desire Basements, 2026 — all-in figures including permits and construction.
A true walkout basement is one where the ground falls away enough that the basement floor meets grade on one side of the house. You open a patio door and step onto the yard, no stairs. That depends on the lot, not the contractor: houses on ravine lots, sloped subdivisions in Richmond Hill, Oakville and King City, and hillside streets in Vaughan sometimes have it. Flat lots, which is most of the GTA, do not. For those, what people call a walkout is really a walk-up: an excavated exterior stairwell that drops from grade down to a door in the foundation wall. A separate side entrance is the same thing placed at the side of the house rather than the back. The project on this page is the walk-up or side entrance, because that is what can be built on a lot that did not come with a slope.
Lot grading decides how the stairwell is built. The stairwell has to be deep enough for a full-height door, which means digging below the basement floor for the landing and drain, and the ground around it has to slope away from the opening rather than toward it. Where the yard already falls toward the house, we regrade or add a low retaining wall so surface water never has a straight path into the stairwell. A walkout with a wet landing every spring is a walkout that was graded wrong. A site visit tells us in ten minutes whether the lot is a good candidate, and the feasibility check in step one above is where we say so.
Cutting a door into a foundation wall is structural work. Every GTA municipality requires a building permit with engineered drawings, and the permit is included in the $15,000 to $25,000 range on this page. The engineer sizes a lintel to carry the wall above the new opening, specifies how the cut is shored while the lintel goes in, and details the stairwell walls. The city inspects the excavation, the concrete and the finished entrance. A quote that leaves permits out is not a lower price. It is a different, riskier project.
Excavation is the first day of the build. An excavator digs the stairwell and the trench for the footing, and on a tight side yard where the machine cannot reach, that becomes hand digging, which slows the job and moves the price toward the top of the range. Retaining walls are the stairwell itself: poured concrete walls on a footing below frost depth, tied into the foundation, holding back the yard on three sides. The taller the basement, the deeper the dig and the thicker the wall, which is why a 9-foot basement costs more than an 8-foot one.
Drainage is the detail that separates a walkout that lasts from one that leaks. The landing gets a drain connected to the weeping tile or sump, so rain and meltwater leave before they reach the door. The stairwell walls are damp-proofed on the soil side and backfilled with clear stone. Frost protection matters in Ontario: the footing sits below frost depth so the walls do not heave, and the door threshold sits above the landing so a blocked drain in a January thaw does not become water on the basement floor.
The door and lintel are the last structural items. A steel or engineered wood lintel spans the opening, and an insulated exterior door system with a proper sill is set into it. Double doors need a longer lintel and a wider cut, which is the other reason the top of the range exists. The stairs are poured concrete with a non-slip finish and a railing to code, and we parge the walls and finish the cap so the stairwell looks like part of the house rather than a hole beside it.
The best reason to build a walkout is light. A door with a full-height glass panel, or a pair of patio doors, brings daylight into a level of the house that otherwise depends on a few small windows. We plan the layout around it: the lounge goes closest to the door, where the light lands, and the bar sits deeper in the plan where it reads as a destination rather than a hallway. Put the sectional facing the door and the fireplace on the wall beside it, and the basement becomes a room with a view of the yard instead of a room under the house.
The second reason is access. Kids come in from the yard and go straight to the basement without tracking through the kitchen. Gym equipment, a pool table, a sofa: all of it comes down a straight exterior stair instead of turning the corner on the interior one. Guests staying in the basement bedroom have their own way in and out, and the family upstairs keeps its front door.
Carlyle Crescent in Aurora shows how the entrance and the interior stair work together. The basement there is 1,716 square feet with a 14-foot kitchen, an 8-foot island, a soundproofed studio, a bedroom and a bathroom, and it was built in 12 weeks. The side entrance and the stair are the spine of a plan like that: put the entrance near the kitchen and lounge, let the interior stair connect to the main floor, and keep the bedroom and studio at the far end. That arrangement is what makes a big basement feel organized rather than sprawling, and it is the one we start from on most walkout projects.
The third reason is value, and it is the quietest. A basement with its own entrance, daylight and a proper door is one buyers understand the moment they walk down. What that is worth on your street is a question for your agent. What it costs is the number at the top of this page, and it is fixed before we start. See the project gallery for the basements these entrances open into.
Yes. Walkout entrance, separate entrance, side entrance: in the GTA these all describe the same project, an excavated exterior stairwell leading down to a private basement door. Whatever your city or your realtor calls it, the $15,000 to $25,000 all-in range applies.
Yes. It is a structural cut into your foundation, so every GTA municipality requires a permit, engineered drawings and inspections. Ours are included in the price; a contractor quoting without permits is a red flag.
Typically 2 to 4 weeks from excavation to final inspection, weather depending. Bundled with a full legal-suite build, the entrance phase happens while interior work continues.
A private entrance is what makes a suite rentable, insurable and valuable in practice. GTA legal suites rent for $1,700 to $2,400 a month, and the walkout entrance is usually the gatekeeper expense between a basement and an apartment.
If your basement has or will have 9-ft ceilings, double doors flood the stairwell landing with light and make the suite feel like a main-floor unit. Tenants notice. In an 8-ft basement, a quality single door does the job.
A true walkout is a basement that meets grade on a sloped lot, so a patio door opens straight onto the yard. On a flat lot, which is most of the GTA, the project is a walk-up: an excavated exterior stairwell down to a door cut into the foundation. A side entrance is the same stairwell at the side of the house. All three are priced the same way, $15,000 to $25,000 with permits.
A drain in the landing tied to the weeping tile or sump, concrete walls damp-proofed on the soil side and backfilled with clear stone, a footing below frost depth so nothing heaves, and grading that slopes the yard away from the opening. The door threshold sits above the landing so a blocked drain in a thaw stays outside.
Where the light can do the most. We put the lounge nearest the door, the bar deeper in the plan, and the bedroom and quiet rooms at the far end. On Carlyle Crescent in Aurora the side entrance and the interior stair organize a 1,716-square-foot basement with a 14-foot kitchen, a soundproofed studio, a bedroom and a bathroom.
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