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450+ Projects Completed

House Addition in Mississauga

Zoning First. Foundation Second. Fixed Price Throughout.

What your lot allows, what the structure will carry and what it costs — settled before design, then built by one in-house team on one contract.

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  • Fixed-price contract
  • 5-year workmanship warranty
  • Permits and inspections handled

Why Homeowners in Mississauga Choose Us

An addition is decided by the bylaw and the foundation long before it is decided by taste.

  • Zoning Checked Before Design

    Setbacks, lot coverage, height and floor space index are read against your address first, so the drawings are of something you can actually build.

  • Engineering and Permits Handled

    Structural drawings, the permit application, committee of adjustment where relief is needed, and every inspection along the way.

  • A Price That Does Not Move

    Excavation, foundation, framing, tie-ins and finishing priced as one scope, with allowances written down before demolition.

  • 5-Year Workmanship Warranty

    In writing and backed by full liability insurance, on structure you will live above for decades.

Renovated living room with a fireplace Renovated kitchen with dark cabinetry

Additions We Have Built

Finished balcony seating area
15+ Years in the GTA

Home Addition, Priced Before the Work Starts

Every addition starts with the same question, and it is not about layout: how much of it is the bylaw going to allow? Setbacks, lot coverage and height decide the footprint before anyone draws a room.

So we check the zoning first and price after. If the plan needs a minor variance we say so at the start, with the timeline it adds, rather than discovering it after you have paid for drawings.

Mississauga projects tend to be either houses from the 1970s and 80s reaching the age where mechanical systems fail together, or condo suites near Square One where the corporation has as much say as the owner.

  • A design the bylaw will not permit
  • A foundation nobody assessed
  • Heating that was never resized
  • A quote before the survey was read
  • Zoning confirmed before drawings
  • Structure and mechanical designed together
  • Permits, engineering and inspections handled
  • Five-year workmanship warranty
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What You Sign With Us, and What You Usually Sign

The difference between a fixed-price contract and an estimate shows up halfway through the job, when the walls are already open.

The Safe Choice

TRUE FORM CONSTRUCTION

  • Fixed-Price Contract

    Scope, allowances and exclusions in writing. Changes approved by you before any work happens.

  • 5-Year Warranty

    Workmanship covered for five years, in a document you keep.

  • Full Management

    Permits, approvals and inspections handled end to end.

  • One Point of Contact

    A project manager who knows your project, not a rotating call centre.

Typical Contractor

  • Estimate Only

    A number on a page that grows once the materials are ordered.

  • 1 Year Limited

    Cover that expires about the time problems appear.

  • Homeowner's Job

    "You pull the permit, I will build." Delays become your problem.

  • Whoever Answers

    Different trades, different answers, no one accountable for the whole.

What the Work Involves

Home renovated by True Form Construction

Rear and Side Additions

The usual way a house gains a kitchen, a family room or a main-floor bedroom: out into the yard, on a new foundation, tied into the existing structure and services.

  • Survey, zoning review and permit drawings before anything is committed
  • Excavation, footings and foundation to frost depth, inspected before framing
  • Roof, envelope and mechanical tie-ins detailed so the two halves behave as one house
Home renovated by True Form Construction

Second-Storey Additions

Where the lot has no room left, the space goes up. That means proving the existing foundation and walls can carry another floor, and planning to live somewhere else while the roof is off.

We establish what the structure will take before the design goes anywhere, and we say plainly when the honest answer is underpinning or a rebuild.

Home renovated by True Form Construction

Garage Conversions and Bump-Outs

Not every addition needs a foundation. A garage brought into the heated envelope, or a modest bump-out for a kitchen or an ensuite, can buy the room you need at a fraction of the cost.

We will tell you which of the three your house actually needs before you commit to the largest one.

Start With a Feasibility Check

Tell us the address and what you want to add. You get an honest answer on what the lot allows, and a written price for building it.

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How the Work Runs in Mississauga

  1. 01

    Consultation and Feasibility

    We read the survey, walk the house and check the zoning at your address, then tell you what size of addition is realistic.

  2. 02

    Design and Engineering

    Floor plans, elevations and 3D views, with a structural engineer sizing the foundation, beams and any underpinning.

  3. 03

    Fixed-Price Contract

    Excavation through finishing as one itemised price, with allowances, exclusions and a schedule showing which rooms are unusable and when.

  4. 04

    Permits and Approvals

    The application goes to the City of Mississauga, along with committee of adjustment where the design needs relief from the bylaw.

  5. 05

    Build and Walkthrough

    Foundation, framing, envelope, mechanical and finishing under one project manager, closing with a deficiency list cleared before sign-off.

Built for Mississauga Homes

Most Mississauga homes are subdivisions built between the 1970s and the 1990s, older homes near the lake and towers around Square One, and what they will carry — and what the lot will allow around them — is what decides the addition.

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What the Existing House Will Take

Cast iron stacks, poly-B supply lines, or a bulkhead hiding the only route the new ductwork could take — and an addition puts new load on all of it.

Footings are exposed and the framing assessed before the structural design is finished, so the engineering is based on the house you have rather than the one the drawings assume.

The Bylaw Decides the Footprint

Lot coverage, side and rear setbacks, height and the space between houses set the outer limit of any addition. Where the design wants more, that is a minor variance — months, not weeks.

We check it at your address before drawing, and we tell you which version of the addition is actually available.

Permits, Engineering, Inspections

An addition needs stamped structural drawings, a permit and inspections at footing, framing, insulation and occupancy. Mississauga takes permit submissions through its ePlans portal, and condo work adds a board approval on top of it.

All of it is ours to file, book and build to.

Extensions and Second Storeys We Have Built

What Mississauga Homeowners Say

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Limited time: a complimentary 3D design package with every booked consultation.

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What Mississauga Homeowners Ask Us

How much does a home addition cost in Mississauga?

It depends on the footprint, the foundation, whether it goes up or out, and how much of the existing house has to change to meet it. Two quotes for "an addition" are rarely describing the same work, so compare the written scope and the allowances rather than the bottom line.

How long does an addition take?

Four to eight months on site for most, with design, engineering and permits ahead of that. A minor variance adds months of its own, which is why the zoning check comes first.

Do I need a permit and a variance?

A permit always. A variance only when the design exceeds what the bylaw allows on your lot. Mississauga takes permit submissions through its ePlans portal, and condo work adds a board approval on top of it. We confirm both against your address before you spend on drawings.

Can we live in the house during the work?

For a rear or side addition, usually yes, with the opening sealed off until the new structure is closed in. For a second storey the roof comes off, so plan to move out for that stage — we will say so at the start rather than halfway through.

Will the addition look like it was always there?

That is a detailing question: rooflines, window proportions, brick or siding match, and how the floor levels meet. It is decided at design stage, and it is the difference between an addition and an extension that looks bolted on.

Do you work outside Mississauga?

Yes. We build additions across the GTA, including Oakville, Brampton and Etobicoke, with the same fixed-price contract and the same five-year workmanship warranty.

Renovated bathroom with a floating vanity, marble tile and a freestanding tub

Additions Across Mississauga

We build additions across Mississauga, from Port Credit, Erin Mills, Streetsville and Clarkson — rear extensions, second storeys and garage conversions on houses that had run out of room.

The first hour of the project is worth more than any other: survey, bylaw, foundation. Everything after that is carpentry.

The city takes permit submissions electronically, which is faster than it once was. Condo approvals still run on the board calendar, and we schedule around that rather than hoping.

450+ Projects Completed

Get Your Fixed-Price Addition Plan

Zoning, engineering, timeline and cost settled before excavation. No moving targets, no surprise invoices.

  • Dedicated in-house team
  • 5-year workmanship warranty
  • Fixed-price, fixed-scope planning

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    If you are ready to get to know us better, we will be happy to provide you with our high-quality design build services around the Greater Toronto Area.

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