Hawthorn Construction
Finished two storey board-and-batten building with a metal roof, built by Hawthorn Construction

Additions and buildings, foundation through finish

We have poured the slab, framed the walls, and finished the inside on buildings that did not exist before.

01 / The work

There is a real difference between a renovation company that finishes rooms and a crew that can put up a building. We do both, and the building work is where the difference shows.

On the Cape Chin cabin we started with a forest clearing. We laid radiant tubing and poured a heated slab, framed through the winter, cut the cathedral rafters, closed it in with board and batten and a metal roof, then built the decks and the screened porch. The gym inside has an epoxy floor we put down ourselves.

That covers the range: additions onto existing homes, detached garages and shops, cabins and bunkies for cottage properties, and second storeys where the lot cannot go any wider.

02 / What is included

Everything this job actually involves

Foundations and slabs

Footings, sonotubes, and poured slabs, including in-floor radiant heat laid before the pour.

Framing and roof structure

Walls, floor systems, cathedral and truss roofs, dormers, and the sheathing and weather barrier that follow.

Exterior finishing

Board and batten, siding, metal roofing, soffit, fascia, windows, and doors.

Additions onto existing homes

Tying new structure into an existing house, including the roofline, the foundation, and matching the exterior.

Cabins, bunkies, and garages

Detached buildings for cottage properties and shops, permitted and built to code.

Interior finishing

Insulation, drywall, flooring including epoxy, trim, and the full interior so you get a finished building, not a shell.

03 / Project

The Cape Chin cabin, built from nothing

This two storey building on the Bruce Peninsula was ours from the first shovel. Radiant loops went down in the fall and the slab was poured before the ground froze.

Framing carried on through the snow. The cathedral rafters went up over the winter, the board and batten and metal roof closed it in, and the decks and screened porch came in the spring.

It is the clearest answer we have to the question of whether we can handle a full build. We did not manage this one. We built it.

Crew placing concrete for a heated slab in a forest clearing
Slab day, with radiant tubing already laid
Cathedral rafter framing inside a two storey building
Cathedral rafters from the inside

04 / What it costs

What actually moves the number

We do not publish a price per square foot, because the honest answer depends on what is behind your walls. Here is what genuinely changes the quote, so you can see where your project is likely to land before we ever visit.

Foundation type
A slab on grade, a crawl space, and a full basement are three very different starting costs.
Size and number of storeys
A second storey means structural review of everything underneath it, which a ground-level addition may not.
Tying into the existing house
Matching a roofline, an exterior, and a foundation to a house that is already there adds work a standalone building does not have.
Site access and location
A rural or cottage site with difficult access changes delivery, excavation, and crew logistics.
Level of interior finish
A finished, heated, year-round space costs considerably more than an unheated garage or shop.
Permits and engineering
Additions and new structures require drawings, permits, and inspections, and often engineered components.
Get a free estimate for your project

05 / How it goes

Four steps, and you always know which one you are in

  1. 01

    We come and look

    Cameron walks the space with you, listens to what you actually want, and tells you honestly what is and is not worth doing.

  2. 02

    A quote you can read

    Written scope, line by line, so you know what is included before anything is torn out. No vague allowances hiding surprises.

  3. 03

    We build it

    The same crew, start to finish. You get updates as things move, and you always know who is in your house on any given day.

  4. 04

    Walk it together

    We go through the finished work with you and fix anything on the list. Then we clean up properly and get out of your way.

Where we do this work

Buildings & Additions across the west GTA and cottage country

We work from the west end of the GTA up through the headwaters and into cottage country. If your town is close to this list and not on it, call and ask.

06 / Questions we get

Straight answers, before you ask

Do you build the whole thing or subcontract it out?

Our crew does the foundation prep, framing, exterior, and interior finishing. Licensed trades handle electrical, plumbing, and HVAC, and we coordinate and stay on site while they work.

Do I need a permit for an addition or a detached building?

Almost always. Additions, garages, and cabins over a small size all require permits, and rural and shoreline properties can also involve conservation authority approval. We work through that with you.

Can you build in cottage country and on rural properties?

Yes. We have built on the Bruce Peninsula and regularly work in the Collingwood, Mono, and Muskoka areas.

Can you build in the winter?

Yes. We framed the Cape Chin cabin through a Bruce Peninsula winter. Concrete work is more weather-dependent and we schedule it accordingly.

How long does an addition take?

Most run four to eight months from permit to finished interior, depending on size, foundation type, and how much of the existing house is affected.

Start the conversation

Tell us what your home should become.

Send photos of the space with your message. A few pictures tell us more than a paragraph ever will, and they make the first estimate far more accurate.

647-560-6115

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