Basement renovation · Thornhill
Modern Basement Apartment Remodel in Thornhill
AfterThornhill, Ontario · Completed 2023See all 2 photosThis Thornhill modern basement apartment remodel turned an underused basement into a fully functional secondary living space with the kind of finishes usually reserved for above-grade rooms. Basement apartments are often treated as utility spaces and given a quick paint-and-vinyl refresh; this project took the opposite approach, treating the basement as primary living space and applying the same material standards as the main floor.
This is the level of basement work we build for Thornhill 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
- Modern Basement Apartment Remodel in Thornhill
- Location
- Thornhill
- Type
- Basement apartment remodel (main-floor material standards)
- Completed
- 2023
- Budget
- $100–$150/sq. ft.
- Published range for this scope tier, not this project’s contract price
- Timeline
- 6–8 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
A modern basement apartment remodel in Thornhill
This Thornhill modern basement apartment remodel turned an underused basement into a fully functional secondary living space with the kind of finishes usually reserved for above-grade rooms. Basement apartments are often treated as utility spaces and given a quick paint-and-vinyl refresh; this project took the opposite approach, treating the basement as primary living space and applying the same material standards as the main floor.
The work
The design focused on maximizing perceived space in a below-grade footprint: smart storage solutions to keep the floor area uncluttered, efficient lighting to brighten the space, and a continuous flooring choice that visually expands the room. High-end materials were used across visible surfaces — durable engineered hardwood, refinished staircase, and clean baseboards — so the basement reads as a planned living space rather than a finished utility room.
The result
The refinished staircase ties the basement back to the upper floors of the home with consistent tones and trim profiles, removing the visual break that often happens at the top of a basement staircase. The result is a basement apartment that feels comfortable, stylish, and entirely livable — well-suited to modern Thornhill homes that need to support multi-generational living, home offices, or rental income without compromising the daily experience of the lower level.
Scope
What we built
- Subfloor prep
- Engineered hardwood install
- Staircase refinish
- Baseboard install
- Smart storage build
- Layered lighting install
Budget
What a basement like this costs
Second suite / basement apartment
$100–$150/sq. ft.
6–8 weeks on site
Egress, fire-rated separation, separate entry, kitchen, smoke/CO alarms. Often lands at the higher end of the range.
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
