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Prefab and Modular Buyers in Ajax, Ontario: design, permit and build on a single contract. A typical 700 sq ft unit estimates at $271,500-$364,000 (about $388/sq ft), with $7,000-$12,000 including Durham Region charges in municipal approvals and a April-November construction season.

Owners who want a shorter on-site build. Modules are fabricated off-site while the foundation and services go in, cutting weeks of weather exposure and neighbour disruption compared with full stick-build.
Service area
Ajax, Ontario
Durham Region
Typical build estimate
$271,500-$364,000
about $388/sq ft in Ajax
Municipal approvals
$7,000-$12,000 including Durham Region charges
quoted separately from the build
Build season
April-November
121 cm snow · -3.8°C winter avg
Frost depth
1.2 m
footing depth, OBC Part 9
Local market
126,666
residents · walkability 47/100
Ajax subdivisions from the 1990s were built with side yards as narrow as 1.2 m, which is the real limiter on what ADU type we can bring to the back of the property. On a Nottingham or Applecroft lot the choice between panelised and stick-built is decided by a tape measure at the side gate, not by budget. Ajax permits additional dwelling units town-wide under the provincial three-unit framework, with Durham Region reviewing water and sanitary capacity.
Compact 1990s-2000s subdivision lots where the required 1.2 m side-yard construction access sets the maximum module width we can crane in. Ajax sees 121 cm of snow and -3.8°C winter averages.
Modular delivery in Ajax is decided by the crane pick, not the drawings: the truck route, the overhead wires on your street and the setup radius determine whether a two-module unit is deliverable at all. We survey the pick before contract - overhead clearance, boom position, road closure requirements with Durham Region - so the crane day is booked against a route that has already been proven. Where the pick fails, the same design is normally buildable stick-built on the identical 1.2 m foundation, so the feasibility work is never wasted.
Everything you need to know about our services.
A typical 700 sq ft build in Ajax estimates at $271,500-$364,000 - about $388/sq ft, set by $7,000-$12,000 including Durham Region charges in approvals, a 1.2 m frost-depth footing requirement and 121 cm of annual snow load. Final pricing follows the site visit.
Related service: Prefab ADU
Ajax permits additional dwelling units town-wide under the provincial three-unit framework, with Durham Region reviewing water and sanitary capacity. Approval costs in Ajax run $7,000-$12,000 including Durham Region charges, quoted separately from construction so the permit stage holds no surprises.
Related service: Prefab ADU
Compact 1990s-2000s subdivision lots where the required 1.2 m side-yard construction access sets the maximum module width we can crane in. At 47/100 walkability, Ajax suites usually keep one parking space: enough to clear the zoning review without surrendering the whole yard. We work regularly in Pickering Village, Westney Heights, Discovery Bay.
Related service: Prefab ADU
Three things, in this order: overhead wires on the street, a side-yard or frontage too narrow for the crane setup radius, and a truck route that cannot legally carry the module. We check all three in Ajax before contract, because a failed pick is the one problem no amount of design revision fixes on delivery day.
Related service: Prefab ADU
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