Basement renovation · Toronto
Cozy Basement Waterproofing & Renovation
AfterToronto, Ontario · Completed 2023See all 14 photosThis basement waterproofing and renovation project started out as a routine flooring replacement and escalated to a full lower-level overhaul once we discovered mould under the original flooring. The owners had hired us for a quick refresh; the mould finding changed the scope completely.
This is the level of basement work we build for Toronto homeowners. The same in-house crew, project manager and fixed-price proposal come with it.
- In-house crew30+ years
- 5-year warrantyWorkmanship
- WSIB$2M liability
- One project managerStart to finish
The transformation
Inside the finished basement
Swipe · tap a photo to enlarge
Like this basement?
Tell us what you want the space to do and we will price this level of build for your square footage, in writing, before anything is demolished.
- Free in-home consultation
- Fixed-price proposal
- 5-year workmanship warranty
The facts
Project at a glance
- Project
- Cozy Basement Waterproofing & Renovation
- Location
- Toronto
- Type
- Basement waterproofing + full renovation (mould remediation)
- Completed
- 2023
- Budget
- +$8,000–$25,000
- Published range for this scope tier, not this project’s contract price
- Timeline
- +1–2 weeks on site
- Published range for this scope tier
- Crew
- In-house, no subcontractor rotation
- Warranty
- 5-year workmanship
The case study
How this basement came together
Waterproofing and finishing this basement
This basement waterproofing and renovation project started out as a routine flooring replacement and escalated to a full lower-level overhaul once we discovered mould under the original flooring. The owners had hired us for a quick refresh; the mould finding changed the scope completely. We paused the flooring work to remediate the water and air-quality problem first, then rebuilt the basement around a proper waterproofing system to make sure the same failure would not happen again.
The work
Our team safely removed the mouldy materials, dried the affected areas, and demolished the existing walls to expose the foundation. We then installed full-height wall waterproofing along the foundation perimeter — a step usually skipped in cosmetic basement remodels — and built new framed walls in front of the waterproofed surface so the finished space stays dry even under heavy rain or snowmelt. The concrete sub-floor was levelled with a self-levelling compound, and waterproof vinyl plank was installed across the entire basement floor for a finish that can handle moisture if any ever returns.
The result
The basement was finished with fresh paint, upgraded 7″ step-bevel baseboards, and a professional final clean. What started as a flooring job ended as a full waterproofing-first renovation — a more involved project than originally scoped, but the only correct response to mould in a below-grade space. The result is a comfortable, dry basement that reads as a planned upgrade rather than a covered-up repair.
Scope
What we built
- Mould remediation and drying
- Foundation perimeter excavation
- Wall waterproofing membrane install
- Wall demolition and reframing
- Sub-floor levelling
- Waterproof flooring install
- Painting and baseboard install
Budget
What a basement like this costs
Waterproofing add-on
+$8,000–$25,000
+1–2 weeks on site
Interior perimeter waterproofing, sump pump, weeping tile when documented water incursion exists. Fixed add-on, not per sq ft.
Finished rec room / family room
$100–$150/sq. ft.
3–4 weeks on site
Framing, insulation, drywall, flooring, baseboards, lighting, paint. Example: 700 sq ft ≈ $70,000–$105,000.
What moves the number
- Square footage: finished basements are quoted per square foot
- Whether a bathroom is added, which brings plumbing permits and ESA electrical
- Second-suite requirements: egress, fire separation, separate entry, kitchen
- Documented water incursion, which turns waterproofing into a fixed add-on
We measure on site and give you a fixed-price proposal before work starts. If your budget and the scope you want do not line up, we will tell you that at the estimate rather than after.
Timeline
How long a basement build takes
A finished rec room runs 3–4 weeks on site, 4–5 weeks with a three-piece bathroom, and 6–8 weeks for a second suite. Basements are quoted at $100–$150/sq. ft., so the schedule tracks the square footage as much as the scope.
Timelines are the schedule we commit to at proposal, with milestones you can hold us to.
Want this priced for your basement?
We measure on site, then put the scope, the schedule and the fixed price in writing before demolition starts.
- Free in-home consultation
- Fixed-price proposal
- 5-year workmanship warranty
Why Osoba
Why homeowners hire Osoba for work like this
- No surprise pricing
- You get a detailed fixed-price proposal built from on-site measurements before construction starts, not an hourly estimate that drifts.
- One team, not a rotating cast
- Our in-house crew does the work. The same faces are in your home from the first day to final detailing, which is why the finishing holds up.
- One person responsible
- A dedicated project manager runs the job end to end and resolves anything that comes up, so you are not chasing trades.
- Peace of mind after we leave
- A 5-year workmanship warranty in writing, plus WSIB coverage and $2M general liability insurance.
Social proof
What homeowners say
Fantastic crew! They were reliable, took care of every detail, worked quickly and efficiently, and did top quality work. They did an amazing job and were an absolute pleasure to work with. I wouldn’t hesitate to recommend them.
Questions answered
Basement renovation questions
How much does finishing a basement cost?
How long does a basement renovation take?
Do you use your own crew or subcontractors?
What warranty and insurance do you carry?
Let’s talk
Get your free basement quote
Tell us about your basement and our project manager Igor will reach out to book a free in-home consultation.
- Phone647-562-4275
- E-mailosobarenos@gmail.com
- Service areaMississauga & GTA
