Custom home by MGI, final landscaping and sod going in

LUXURY CUSTOM HOMES · GTA & YORK REGION

Luxury Custom Home Builds in the GTA

Your largest private asset, built like one.

BuildwithMGI is a licensed Ontario builder of luxury custom homes for owners across the GTA and York Region. Founded in 2014 and registered with Tarion, the firm builds estate-scale homes with engineered structure, radiant heating and integrated smart-home systems. Each home runs on a priced allowance schedule, signed change orders and monthly cost-to-complete reporting.

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Est. 2014

Family-owned

Licensed Ontario builder

Tarion-registered

York Region · GTA

Hamilton · Barrie · Ottawa · Cornwall

An array of multi-unit projects

Delivered

Family-owned builder since 2014.

Licensed Ontario builder.

Tarion-registered.

Multi-unit, commercial and warehouse builds delivered.

Owner risks

Custom homes go over budget in three predictable places.

Allowance creep

Placeholder allowances look affordable until the real selections arrive. We price allowances from your actual finishes before you sign.

Design drift

Changes after permit cost the most. The design is frozen before submission, and every later change is priced and signed before it is built.

Hidden site costs

Rock, groundwater, tree permits, conservation authority review, septic and wells. We investigate the lot at feasibility, so these are in the first number, not the last invoice.

How your capital is protected

How your capital is protected.

An estate home is a seven-figure commitment. These safeguards are written into the contract, not promised in a meeting.

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Tarion enrolment before construction starts, with the statutory one-, two- and seven-year warranties.

Payments tied to completed milestones, never to the calendar.

The 10% statutory holdback required under Ontario's Construction Act, tracked on every invoice.

Sub-trade payment tracking at each draw, so no lien reaches your title.

Monthly cost-to-complete reporting against the signed budget.

Course-of-construction insurance for the home's full value, in place before we start work, backed by $5 million in commercial general liability coverage.

Technical scope

Engineered like a commercial building. Finished like a residence.

Geotechnical report and foundation design stamped by a structural engineer.

Poured or ICF foundations with exterior membrane waterproofing and full perimeter drainage.

Engineered floor systems and steel beams for long clear spans and open-plan living.

Energy compliance to SB-12 under the 2024 Ontario Building Code.

Hydronic radiant in-floor heating with a high-efficiency boiler or heat pump.

Balanced ventilation through an HRV or ERV.

Standby generator, EV charging and structured low-voltage cabling for smart-home, security and AV.

Residential elevators installed by a TSSA-licensed elevating device contractor.

High-performance windows and continuous exterior insulation.

Site and approvals

We clear the lot before we price the house.

Zoning review and Committee of Adjustment variances where the design needs them.

Conservation authority permits where the lot is in a regulated area.

Tree protection permits (in Toronto, any private tree 30 cm or more in diameter).

Demolition permits and utility disconnects for knock-down rebuilds.

Septic, well and entrance permits on rural estate lots.

Process

Five stages. A family owner signs off on each one.

Feasibility

Lot review, zoning, site risks and a preliminary budget range.

Design and pricing

Architect and designer coordinated, allowances priced from real selections.

Permits

Building permit and any conservation, tree or variance approvals.

Build

Monthly cost-to-complete, site photos and owner walkthroughs at framing and pre-drywall.

Handover

Tarion pre-delivery inspection, occupancy, as-builts, manuals and warranty documents.

Our crews do the work, each carrying its own insurance and WSIB coverage.

Estate homes across the GTA and York Region.

York Region and Northern GTA

Newmarket · Vaughan · Richmond Hill · Aurora · Markham · King City · East Gwillimbury · Holland Landing · Bradford · Mount Albert · North York

Surrounding hubs

Hamilton · Barrie · Oakville · Mississauga · Milton · the Greater Toronto Area

Eastern Ontario and NCR

Ottawa · Cornwall

FAQ

Questions owners ask.

Is a custom home built on my own land covered by Tarion?

Yes. Ontario requires builders to enrol every new home with Tarion before construction starts, and for a home built on land you already own, before the construction contract is signed. Coverage includes the statutory one-year, two-year and seven-year warranties, and we handle enrolment as your licensed builder.

How do you keep a custom home on budget?

Allowances are priced from real selections, not placeholder numbers. The design is frozen before permit, every change is priced and signed before it is built, and you receive a cost-to-complete report every month.

How long does a custom home take to build in the GTA?

Construction on an estate-scale home typically runs 12 to 18 months after permit. Design and permitting usually add 4 to 9 months before that, and a Committee of Adjustment variance can add 3 to 4 more, so we issue a baseline schedule with the budget and update it monthly.

Do I need a conservation authority permit to build?

You do if the lot sits in a regulated area near a valley, watercourse, wetland or shoreline. The Toronto and Region, Lake Simcoe Region and Credit Valley conservation authorities each review work in their watersheds, and we check the regulation mapping at feasibility.

What changes when building on a rural estate lot?

Rural lots usually need a septic system designed and permitted under Part 8 of the Ontario Building Code, a drilled well, and an entrance permit from the road authority. We price these at feasibility so they never arrive as surprises.

Bring the lot and the vision. We'll bring the number.

Share the address, drawings or a wish list. A family owner reviews it and replies within one business day.

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