Home/ Services/ Basement Renovation
Service · Ottawa

Basements That
Add a Whole Floor.

EcoWave Contracting provides basement renovations and finishing in Ottawa for family rooms, home offices, gyms and entertainment spaces. Indoor work can be planned throughout winter. We discuss the existing condition, moisture concerns, layout, finishes and any required approvals before agreeing the scope.

Free On-Site Estimate → Recent Basements
6-10 wksTypical timeline
5 yrWorkmanship warranty
PermittedTo OBC standards
Finished Ottawa basement renovation with built-in entertainment cabinetry and warm hardwood floors
Why It Matters

A basement is a water project before it's a finishing project.

Ottawa basements take more abuse than any other space in the house. Spring snowmelt, frozen ground, clay-soil hydrostatic pressure, the occasional flash storm — all of it pushes water toward your foundation walls and slab. Most "basement renovation" failures we see weren't bad framing or bad drywall. They were a one-inch crack the previous contractor sealed with paint.

Every Ottawa basement we finish starts with a moisture inspection. If we find anything — a damp wall, an efflorescence stain, a sump pit not pumping, an inadequate weeping tile — we price the fix into the quote. No covering up problems with vapour barrier and walking away. Then we frame, insulate to current OBC R-value, run electrical and plumbing rough-ins, drywall, finish.

  • Moisture inspection & remediation
  • Sump pump & backwater valve
  • R-20 wall + R-31 ceiling insulation
  • Code-compliant egress windows
  • City of Ottawa building permit
  • Sound-isolation between floors
Basement Types

Six Common Builds.

Family Room

Open living space with built-in entertainment, hardwood, lighting. 6-8 weeks.

Legal Secondary Suite

Self-contained apartment with kitchen, bathroom, separate entrance. Permit + inspection.

Home Gym

Rubber flooring, mirrored walls, dedicated electrical, full ventilation.

Home Theatre

Sound-isolated walls, projector pre-wire, tiered seating riser, blackout finish.

Basement Bathroom

New rough-ins, sump-integrated drainage, full waterproofing — see Bathroom Renovation.

Wine Cellar / Storage

Climate-controlled cellars, custom shelving, organized utility & cold-storage rooms.

Detailed view of finished Ottawa basement with hardwood and built-ins
Build Spec

What Goes Behind the Wall.

The hidden layers that decide whether a basement lasts 25 years or starts smelling musty in year three.

  • Vapour managementDimple-board on foundation, poly to current OBC
  • Wall framingSteel studs or 2×4 wood off concrete with thermal break
  • InsulationR-20 closed-cell spray or rigid + batt to OBC 9.36
  • Sump systemPrimary + battery backup, alarm, monthly test
  • Egress windowsOBC-compliant size for any bedroom (legal req)
  • HVAC integrationDedicated returns, balanced supply, dehumidification
  • Workmanship warranty5 years labour + manufacturer on materials
Our Process

Permit. Build. Inspect.

01

Inspect

Moisture, mould, electrical, structural — full pre-build inspection.

02

Permit & Design

City of Ottawa permit application, layout, fixed-price quote.

03

Build

Frame, electrical, plumbing, drywall, finish — 6-10 weeks active.

04

Final Inspection

City sign-off, walkthrough, 5-year warranty in writing.

FAQ

Basement Questions.

Don't see yours? Call (343) 998-8316.

Can you finish an Ottawa basement during winter?
Yes. Interior basement work such as framing, insulation, drywall, flooring and painting can be planned throughout winter. Any exterior excavation, drainage or window work needs a separate assessment and schedule. Existing leaks, moisture or remediation needs must be addressed before affected areas are enclosed. Discuss your basement project with EcoWave.
How much does a basement renovation cost in Ottawa?
Family-room finishes typically run $40-$70 per sq ft. Legal secondary suites with full kitchen and bathroom are $80-$120/sq ft. A standard 1,000 sq ft Ottawa basement comes in at $40,000-$70,000 finished, $80,000-$120,000 as a legal suite. Fixed-price written quotes — no hourly billing.
Do I need a permit to finish my basement?
Yes — almost always. The City of Ottawa requires a building permit for any basement finishing that involves new walls, electrical rough-ins, plumbing, or HVAC changes. Legal secondary suites have their own permit class with stricter requirements. We pull and close all permits — included in the fixed quote.
What's a legal secondary suite vs an in-law suite?
Legal secondary suites are City-registered self-contained apartments with separate entrance, kitchen, bathroom, and code-required egress windows. They can be rented out and add significantly to property value. In-law suites have similar layout but no separate entrance / less rigorous egress; they're for family use, not rentals. We build both.
What about waterproofing?
This is the single most important question. We inspect for moisture, efflorescence, weeping-tile failure and sump issues before finishing. If we find a problem, we price the fix into the quote — exterior excavation if needed, interior dimple-board, sump replacement, backwater valve. We don't cover problems up.
How long does a basement renovation take?
Family-room finishes: 6-8 weeks active build. Legal suites with full kitchen + bath: 8-12 weeks. Pre-build (design, permit application, City review) adds 4-8 weeks. We start design in winter for spring/summer build dates.
What ceiling height do I need?
Ontario Building Code requires 6'5" minimum finished ceiling for habitable basement rooms (lower under beams). Most Ottawa basements built post-1990 clear this comfortably. Older homes can be tight — we measure during the on-site visit and discuss bulkhead strategies if needed.
Can you handle the egress window cut-out?
Yes. Any basement bedroom requires an OBC-compliant egress window (5.7 sq ft openable, max 44" sill height). We core-cut the foundation, install the well, set the window, and waterproof the new opening. Adds approximately $4,000-$8,000 per window.
What's the warranty?
5 years workmanship on labour (framing, drywall, electrical, plumbing). Materials carry their own manufacturer warranties. Sump pump systems have a 7-year manufacturer warranty; we recommend backup batteries with annual swap.
Service Areas

Basement Renovations Across Ottawa.

Barrhaven Kanata Orléans Nepean Stittsville Manotick Gloucester Westboro The Glebe
Free Estimate

Tell us about your basement.

We respond within one business day with a site-visit window. Site visits and written quotes are free.

+1 (343) 998-8316 ecowavecontracting@gmail.com

Basement Quote

Fixed-price written quote within 1 business day.

Ready to add a floor?

Free site visit. Fixed-price written quote. No high-pressure sales.

Get a Free Quote →