Your local Mississauga basement renovation crew
Osoba Renos & Design is headquartered in Mississauga — a quick drive to every neighbourhood from Port Credit and Lakeview to Streetsville and Meadowvale. We finish basements, build basement apartments, and waterproof below-grade spaces across Peel Region. See exactly how our renovation process works from estimate to handover, or compare materials in our engineered hardwood vs vinyl plank flooring guide.
Recent work
Recent Basement Projects
Mississauga basement renovation cost & timeline (2026)
Four scope tiers we see most often across Mississauga — from finished living space to legal ARU. Add 4–6 weeks for City of Mississauga permit.
| Scope tier | Cost range | Timeline | Typical inclusions |
|---|---|---|---|
| Finished rec room / family room | $100–$150/sq. ft. | 3–4 weeks | Framing, insulation, drywall, flooring, baseboards, lighting, paint. Example: 700 sq ft ≈ $70,000–$105,000. |
| Finished basement + 3-piece bathroom | $100–$150/sq. ft. | 4–5 weeks | Full finish plus bathroom with shower, plumbing permit, and ESA electrical. Priced per sq ft at estimate. |
| Second suite / basement apartment | $100–$150/sq. ft. | 6–8 weeks | Egress, fire-rated separation, separate entry, kitchen, smoke/CO alarms. Often lands at the higher end of the range. |
| Waterproofing add-on | +$8,000–$25,000 | +1–2 weeks | Interior perimeter waterproofing, sump pump, weeping tile when documented water incursion exists. Fixed add-on, not per sq ft. |
Adding a Mississauga basement apartment — the ARU rules
Five rules that decide whether a Mississauga basement can be legally rented as an Additional Residential Unit.
Eligibility
Most detached, semi-detached, and townhouse properties in Mississauga can legally add a second unit under Ontario's ARU framework. Up to two ARUs per principal dwelling (one inside, one as a garden suite) where lot size allows.
Minimum size
Each ARU must be at least 35 m² (about 376 sq ft) of habitable floor area, with a private entrance, kitchen, full bathroom, and at least one bedroom or sleeping area.
Parking
One additional parking space per ARU in most areas; relaxed in zones close to higher-order transit. Cannot encroach on required setbacks or front-yard landscaping minimums.
Fire separation
Mississauga building permits enforce a 45-minute fire-rated assembly between units, fire-rated doors on shared exits, sealed penetrations, and hard-wired interconnected smoke and CO alarms on every storey.
Registration with the City
After construction, the ARU must be registered with the City of Mississauga's Second Unit registration program. Registration confirms safety inspection and adds the unit to the City record.
Make the Right Choice
Why homeowners chooseOsoba RenosOsoba Renos & Design
№1 Home Remodeling Contractor in Toronto & GTA — clear pricing, in-house trades, and a guaranteed timeline.
What we deliver
Basement Renovation Services
Open-Concept Layout
Create a bright, inviting lower level with smart space planning, wall adjustments, and improved flow.
Permit & Code Compliance Support
Support with permit requirements, drawings, inspections, and licensed trade coordination where required.
Flooring Upgrade
Premium installation of luxury vinyl, engineered hardwood, or tile with proper subfloor preparation.
Framing & Drywall
Complete wall construction, drywall installation, taping, plastering, and finishing for a clean living space.
Insulation & Soundproofing
Thermal and acoustic upgrades for a warmer, quieter, and more comfortable basement.
Lighting & Electrical Upgrades
Pot lights, feature lighting, outlets, switches, and modern electrical improvements coordinated with licensed trades.
Basement Kitchens & Bars
Custom basement kitchens, wet bars, and entertainment areas with cabinetry, countertops, backsplashes, and lighting.
Basement Bathrooms
Beautiful basement bathrooms with waterproofing, premium tilework, modern fixtures, ventilation, and refined finishes.
Laundry Room Renovation
Functional laundry spaces with tile, cabinetry, storage, backsplashes, and clean utility upgrades.
Entertainment & Family Rooms
Comfortable basement living spaces designed for movies, games, hosting, and everyday relaxation.
Lifestyle Rooms
Custom spaces for a home gym, office, studio, playroom, guest room, or hobby room.
Storage Solutions
Built-in closets, shelving, mechanical room storage, and smart solutions to maximize basement space.
Interior Painting
Smooth, moisture-resistant painting for walls, ceilings, trims, and doors.
Floor Leveling
Professional leveling and subfloor preparation for a stable, seamless flooring installation.
Microcement
Modern microcement walls, floors, or feature surfaces with a sleek, waterproof, minimalist finish.
Questions answered
Basement Renovation FAQ — Mississauga
How long does a basement renovation take in Mississauga?
A full basement renovation in Mississauga is typically completed within 3–4 weeks, depending on scope, layout changes, and whether a basement bathroom or second-suite kitchen is being added. Our crew follows a structured schedule to keep progress predictable and the site clean.
Do I need a building permit for a basement renovation in Mississauga?
Yes — basement finishing in Mississauga requires a City of Mississauga building permit, plus electrical (ESA) and plumbing permits when those trades are involved. Minimum finished ceiling height, egress windows, and fire-separation rules apply, and second units have their own additional requirements. We pull all permits, prepare drawings, and coordinate inspections as part of the project.
How much does a basement renovation cost in Mississauga?
We quote finished basements at $100–$150/sq. ft. because size and scope vary greatly — bathroom additions, second suites, and structural work all affect where you land in that range. We measure on-site and provide a fixed quote tied to your square footage before work begins.
Can I add a second unit (basement apartment) in Mississauga?
Yes — Mississauga permits second units in most detached, semi-detached, and townhouse properties under the Province of Ontario’s Additional Residential Unit framework, provided egress, fire-separation, and parking requirements are met. A separate registration with the City is required once the unit is built. We confirm what is allowed for your specific property before quoting.
What flooring is best for a basement in Mississauga?
For most Mississauga basements, waterproof vinyl plank is the safest choice — it handles the moisture and temperature swings typical of below-grade rooms in Peel Region. Engineered hardwood can be installed in basements with proven dry slabs and a vapour barrier, but it carries more risk. Tile is appropriate for bathrooms, laundry areas, and entry zones.
Which Mississauga neighbourhoods do you serve?
We work across all of Mississauga — Port Credit, Lakeview, Cooksville, Mississauga Valley, Streetsville, Erin Mills, Meadowvale, Clarkson, Lorne Park, Mineola, Square One/City Centre, and Churchill Meadows. Osoba Renos & Design is headquartered locally in Mississauga, so on-site visits, inspections, and material runs stay efficient.
How much income can a Mississauga basement apartment generate?
In 2026, a 1-bedroom basement apartment in Mississauga typically rents for $1,600–$2,200 per month, depending on neighbourhood, finish level, parking, and separate-entrance presence. Higher-demand pockets (Port Credit, near Square One, near GO transit corridors) command the top of that range. We do not handle the leasing — we just build it to legal standard so you can rent without insurance or compliance issues.
My Mississauga basement is 6'2" — can I still legally finish it?
Below the Ontario Building Code minimum (1.95 m / 6'5") it cannot be a legal bedroom or rental suite. You can still finish it as non-habitable rec/storage space without a permit, but you cannot list it as a bedroom for resale and it cannot be a registered ARU. Options to gain height: underpinning ($25,000–$60,000) or bench-footing ($15,000–$35,000). We measure on the site visit and tell you what is realistic.
How long does the City of Mississauga ARU permit take?
For a typical basement ARU build, City of Mississauga plan exam currently runs 4–6 weeks from submission to issued permit. Engineer-stamped drawings (when structural work is involved) add another 1–2 weeks. After construction, the ARU registration step takes a final inspection and document filing — usually 1–2 weeks after we close the permit.
Let’s talk
Contact Osoba Renos & Design
Planning a basement renovation in Mississauga? Reach out today for a free in-home estimate.
- Phone647-562-4275
- E-mailosobarenos@gmail.com
- Service areaMississauga & the Greater Toronto Area
- Free, no-pressure estimate
- In-house crew · 30+ years experience
- 5-year workmanship warranty
- WSIB & $2M Liability Insurance