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Aging in Place in King, Ontario: design, permit and build on a single contract. A typical 700 sq ft unit estimates at $16,000-$32,500 (about $385/sq ft), with $9,000-$16,500 including York Region and septic charges in municipal approvals and a May-October construction season.

Older homeowners who want to stay on their own property instead of moving to a retirement residence. Single-storey ADUs with step-free entry, wider doorways and a curbless shower let a parent downsize onto the same lot the family already owns.
Service area
King, Ontario
York Region
Typical build estimate
$16,000-$32,500
about $385/sq ft in King
Municipal approvals
$9,000-$16,500 including York Region and septic charges
quoted separately from the build
Build season
May-October
150 cm snow · -5.3°C winter avg
Frost depth
1.2 m
footing depth, OBC Part 9
Local market
27,333
residents · walkability 21/100
King Township is almost entirely Oak Ridges Moraine and Greenbelt, with core-area designations that prohibit new building envelopes outright on some parcels. We run a moraine designation check against the property roll number before quoting a King City or Nobleton laneway-suite or garden-suite project, because on a core-area lot the honest answer is sometimes no. King Township permits additional dwelling units, with Oak Ridges Moraine and Greenbelt policies plus private servicing governing the majority of properties.
Estate and agricultural parcels, many over an acre, on private well and septic with moraine core-area restrictions.
Aging-in-place design plans for a body that will change: blocking in the walls for future grab bars, a bathroom sized for assistance today, and a single-storey layout so the unit never depends on stairs. Single-storey means a wider footprint, so on a King lot we test the plan against lot coverage and rear-yard soft landscaping before committing to the layout. Proximity is the point - the unit sits on the same parcel as family, so -5.3°C winters never mean a drive across King to check in.
Everything you need to know about our services.
A typical 700 sq ft build in King estimates at $16,000-$32,500 - about $385/sq ft, set by $9,000-$16,500 including York Region and septic charges in approvals, a 1.2 m frost-depth footing requirement and 150 cm of annual snow load. Final pricing follows the site visit.
Related service: Our ADU services
King Township permits additional dwelling units, with Oak Ridges Moraine and Greenbelt policies plus private servicing governing the majority of properties. Approval costs in King run $9,000-$16,500 including York Region and septic charges, quoted separately from construction so the permit stage holds no surprises.
Related service: Our ADU services
Estate and agricultural parcels, many over an acre, on private well and septic with moraine core-area restrictions. King is car-oriented at 21/100 walkability, so parking retention and driveway access constrain the footprint more than the zoning envelope does. We work regularly in King City, Nobleton, Schomberg.
Related service: Our ADU services
Almost always. A single-storey plan removes the stair as a future failure point, and the cost is a wider footprint that has to clear King lot coverage. Where coverage is tight, a two-storey unit with a fully self-contained ground floor is the usual compromise.
Related service: Our ADU services
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