Basement Renovations in
Cambridge, Kitchener and Waterloo

From open unfinished space to a finished family room, home office, or legal rental suite. Basement renovations done properly start with waterproofing and end with a space that holds up, not one that looks good for two years then fails.

Basement finishing Basement bathrooms Legal basement apartments Waterproofing Cambridge, Kitchener, Waterloo
What we cover

The most common reason basement renovations fail is skipping the steps that do not show on finish day

An unfinished basement is the most underused square footage in most Cambridge, Kitchener and Waterloo homes. Done right, it adds livable area that functions as well as the floors above it. Done carelessly, it becomes a moisture problem, a code issue, or a failed inspection a few years after the drywall goes up.

We build basements the long way. That means waterproofing is assessed and addressed before framing starts, ceiling heights are confirmed against what the scope requires before you commit to a budget, and electrical is designed to code from the start rather than reverse-engineered to pass inspection after the fact.

Finishing an open, unframed basement from scratch
Gutting and rebuilding a previously finished basement
Adding a bathroom or wet bar to an existing basement
Converting a basement into a legal rental apartment
Addressing moisture and waterproofing issues before finishing
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Best: finished basement living area or suite
What we build

Basement renovation services in Cambridge, Kitchener and Waterloo

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Open Basement Finishing

Converting an unframed basement into finished living space for families in Cambridge, Kitchener and Waterloo. Framing, insulation, drywall, flooring, lighting, and trim done to the same standard as the floors above it.

  • Framing, insulation, and vapour barrier
  • Drywall, tape, and finish
  • Pot light and fixture rough-in
  • Flooring and baseboards
  • Egress window assessment and installation where required
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Basement Bathroom Additions

Adding a bathroom to an existing or new basement requires breaking concrete to run drain lines below the slab. We handle the full process: concrete cutting, rough plumbing, waterproofing, tile, and fixture installation to a finished standard.

  • Concrete cutting and drain line installation
  • Full rough and finish plumbing
  • Waterproofed shower and wet area tile work
  • Vanity, toilet, and fixture installation
  • Exhaust ventilation to code
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Legal Basement Apartments and Suites

Converting a basement into a legal secondary suite that meets Ontario Building Code and Cambridge, Kitchener or Waterloo zoning requirements. Full kitchen, separate entrance, fire separation, and egress to qualify for legal rental income.

  • Permit management with the applicable municipality
  • Fire separation between units per OBC
  • Separate entrance construction
  • Full kitchen rough-in and installation
  • Egress window installation to meet OBC minimums
  • Electrical sub-panel for separate metering
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Waterproofing and Structural Preparation

Moisture assessment and waterproofing work done before framing begins. For homes in Cambridge, Kitchener and Waterloo with known or suspected water ingress, we address the source properly before any finished material goes in.

  • Interior and exterior drainage assessment
  • Interior weeping tile and sump pit installation
  • Foundation crack injection and parging
  • Dimple mat and moisture barrier installation
  • Window well installation and grading correction
Basement work across Cambridge, Kitchener and Waterloo
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What it costs

Basement renovation cost ranges in Waterloo Region

Every basement is different. Ceiling height, moisture conditions, existing rough-ins, and the intended use all affect the final number. These ranges reflect typical projects we complete in Cambridge, Kitchener and Waterloo. Your locked budget is confirmed during the planning phase.

Tier 01
$30K–$50K
Basic Finishing

An open, unframed basement converted into clean finished living space with no bathroom. Suitable for a recreation room, home gym, or storage-and-hobby space.

  • Framing, insulation, vapour barrier
  • Drywall and paint
  • Pot lights and basic electrical
  • Flooring and trim
  • No bathroom included

Range varies with ceiling height, square footage, and finishes selected.

Tier 02 — Most common
$50K–$90K
Full Renovation with Bathroom

A fully finished basement with a complete bathroom, proper egress, and finished living areas throughout. The right scope for a family that wants to use the space daily.

  • Everything in Tier 01
  • Full bathroom with concrete cut
  • Upgraded electrical and panel work
  • Egress window installation
  • Custom storage and built-in options

Higher end applies to full gut and rebuilds with premium finishes.

Tier 03
$70K–$120K+
Legal Basement Apartment

A fully permitted, Ontario Building Code-compliant secondary suite with its own kitchen, bathroom, separate entrance, and fire separation from the main unit.

  • Everything in Tier 02
  • Full kitchen rough-in and installation
  • Separate entrance construction
  • OBC-compliant fire separation
  • Sub-panel for separate metering
  • Permit management included

Upper range reflects projects with significant structural or entrance work.

The Complete Renovation Standard

How our framework prevents the three most common basement renovation failures

Basement renovations fail in predictable ways. Moisture issues that were visible during planning get ignored to keep the budget down, and the water finds its way in within two years of the drywall going up. Electrical work that was never designed to code passes a visual inspection but fails when a permit is eventually pulled for something else. Ceiling height assumptions get confirmed after framing is complete, when nothing can be done about it without tearing everything out.

None of these are surprises. They are the result of a process that was not structured to prevent them. The Complete Renovation Standard is that structure, applied to every basement project we take on in Cambridge, Kitchener and Waterloo.

Read the Full Standard
Pillar 01 — Planning
The problem: ceiling height confirmed too late
Ceiling height is measured and assessed against the intended use during the planning phase, before budget is locked. If the existing height cannot accommodate the scope, we tell you before you commit, not after framing has started.
Pillar 05 — Longevity
The problem: moisture ignored to keep the budget down
Waterproofing conditions are assessed and documented before any finished material is specified. If water ingress is present or likely, we address it first. We will not frame over a moisture problem to hit a number, because the cost of doing so lands on the homeowner two years later.
Pillar 04 — Infrastructure
The problem: electrical not designed to code from the start
Electrical layouts are designed to Ontario Building Code requirements during the planning phase, not retrofitted after the fact. Every rough-in is inspected before walls close. We do not hand you a finished basement with electrical that will not pass a future permit inspection.
Featured basement project
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Brad was able to transform my kitchen exactly how I planned and matched the stain on the cupboards perfectly to the barn doors I already had. He also transformed an old laundry room into a beautiful full bathroom with a soaker tub. Beautiful!

Nicole M., Waterloo Region
★★★★★
Common questions

Basement renovation questions answered

Basement renovation costs in Cambridge, Kitchener and Waterloo depend on the scope, the condition of the existing space, and what you want to use it for. A basic finishing project with no bathroom typically runs $30,000 to $50,000. A full renovation with a bathroom added runs $50,000 to $90,000. A fully permitted legal basement apartment with its own kitchen, bathroom, and separate entrance runs $70,000 to $120,000 or more. The condition of your existing slab, the ceiling height, and whether moisture work is required before finishing are the biggest variables. We provide a fully locked budget during the planning phase, so there are no surprises once construction begins.
Yes, in most cases. In Ontario, a building permit is required for basement finishing work that includes framing new walls, adding or relocating plumbing, adding electrical circuits, or creating a secondary suite. Cosmetic work such as painting or replacing flooring in an already-finished basement typically does not require a permit. For any project that adds living space, a bathroom, or a kitchen, you should expect a permit to be required. We assess the permit requirements during the planning phase and manage the full application with the City of Cambridge, Kitchener, or Waterloo, including all required inspections throughout construction.
Yes. Legal basement apartments in Cambridge, Kitchener and Waterloo require a building permit, compliance with Ontario Building Code requirements for fire separation between units, a minimum ceiling height of 1.95 metres in habitable rooms, at least one egress window in the sleeping area, and in most cases a separate entrance. Zoning approval may also be required depending on your property. We manage the full process: permit application, engineering where required, fire separation, egress, and all required inspections. A suite built to these standards qualifies for legal rental income and will not create liability exposure for an owner the way an unpermitted conversion does.
Before any framing or insulation goes in, we assess the existing moisture conditions in the basement. This includes checking for active water ingress, staining patterns that indicate past water entry, efflorescence on the foundation walls, and the condition of any existing drainage systems. If moisture issues are present or likely, we address them before the basement is finished, not after. Depending on the findings, this can mean interior weeping tile installation, foundation crack injection, dimple mat installation, or grading corrections at the exterior. These costs are disclosed transparently during the planning phase and included in the locked budget before construction begins. We do not frame over a moisture problem.
The planning phase for a basement renovation in Cambridge, Kitchener or Waterloo typically runs 3 to 6 weeks, during which selections are finalized, permits are applied for, and the budget is locked. Active construction then runs 6 to 12 weeks for a basic finishing project, 10 to 16 weeks for a full renovation with bathroom, and 14 to 22 weeks for a legal basement apartment where permit processing time is a factor. Permit processing times with the Cities of Cambridge, Kitchener and Waterloo vary and can affect the overall schedule. Your complete timeline is confirmed in writing before we mobilize, and it does not change without your written approval.

Planning a basement renovation in
Cambridge, Kitchener or Waterloo?

Tell us about your space and what you want to do with it. Brad will follow up personally within one business day to talk through scope, budget, and what it takes to do it properly.

Book a Free Planning Call (226) 696-0555

Licensed GC. Insured. Serving Cambridge, Kitchener and Waterloo.