
Basements, Additions & Outdoor · Trenton
Basement Finishing in Trenton
Unfinished or dated basements turned into warm, dry family rooms, offices, gyms and guest suites.
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Trenton, Northumberland & Quinte
Basement Finishing in Trenton
Plenty of Trenton homes, from Downtown Trenton and Frankford to the rest of the area, have a basement that is unfinished or finished decades ago. Either way, it is usually the cheapest square footage in the house to turn into real living space.
We finish Trenton basements from bare concrete to move-in ready: insulation, framing, bathrooms, wet bars, laundry, pot lights, drywall, flooring and trim, with the permit and inspections handled.
Building permits for basement finishing in Trenton are issued by the City of Quinte West. We tell you up front whether your project needs one, prepare or coordinate the drawings, and book the inspections so the work is signed off properly.
Call (647) 424-1511 or send the form on this page for a free basement finishing quote in Trenton. Tell us what you want to change, add a few photos of the space, and we will book a visit and send a written quote that lists the scope, the materials, the permits involved and the schedule.
Trenton homes
What basement finishing involves in Trenton's houses
Century and heritage homes in Trenton
Basements in Trenton's older homes often have stone, rubble or block foundations and low ceilings. They can be finished, but insulation has to suit the foundation so moisture is not trapped, and gaining height means underpinning or a bench footing, designed by an engineer and covered by a permit.
Post-war bungalows and back-splits in Trenton
Post-war Trenton bungalow basements are usually a single open space with the furnace in the middle and a side door at grade. They finish well, but ceilings are often low, so bulkheads around ductwork are planned carefully, and old clay weeping tile and foundation cracks are checked before anything is framed.
Newer homes built since 2000 in Trenton
Newer Trenton basements are usually poured concrete with a bathroom roughed in, so they are among the easiest to finish. We check the builder's drainage and the grading around the house, which often settles in the first years, then insulate, frame and finish with the bathroom placed where the rough-in allows.
Lakefront and riverside properties in Trenton
Near the water around Trenton, basement finishing starts with moisture control: a working sump with a backwater valve where appropriate, proper grading, and insulation and flooring that tolerate dampness.
Rules in Trenton
Permits and approvals for basement finishing in Trenton
Building permits
Building permits in Trenton are issued by the City of Quinte West. Electrical work anywhere in Ontario is done by a licensed electrical contractor under an Electrical Safety Authority (ESA) permit. We confirm what your project needs before you sign and book every inspection.
Conservation authority
Much of Trenton falls within the Lower Trent Conservation watershed. Building near a shoreline, river, floodplain, valley or wetland can need a conservation authority permit before the municipality will issue a building permit. We check the regulation mapping for your property early so it does not hold up the schedule.
Testing before demolition
Homes built before the 1990s can contain asbestos in plaster, textured ceilings, floor tile, vermiculite insulation and pipe wrap, and homes from before the 1960s often have lead paint. In Trenton's older houses we test suspect materials before demolition and handle them by the regulations if they are found.
The service
Basements Finished Warm, Dry and Bright
A finished basement is often the most affordable way to add real living space to a home: a family room, a home office, a gym, a guest suite or a playroom. The difference between a basement that feels like part of the house and one that feels like a basement comes down to moisture control, insulation, lighting and ceiling height.
Before framing, we look for signs of water and fix the cause first. Then we insulate the foundation walls properly, frame, run electrical and plumbing, add pot lights, and finish with drywall, flooring suited to below-grade spaces, trim and paint. Many basements also get a bathroom, a wet bar or a laundry room.
More about basement finishing →The process
How your Trenton project comes together
01
Consultation
Tell us what you want to change and send a few photos. We visit, measure and talk through options.
02
Written Quote
A clear scope, materials, permits and schedule, in writing. No vague allowances.
03
Permits & Planning
Drawings, permits and material orders lined up before demolition starts.
04
Build & Walk-Through
Work done in the right order, inspected where required, and walked through with you at the end.
Across Trenton
Basement Finishing throughout Trenton
Trenton is the main community in Quinte West, at the mouth of the Trent River on the Bay of Quinte and home to CFB Trenton, with older homes downtown and newer subdivisions on the edges of town.
Questions
Basement Finishing in Trenton: FAQs
How do I get a basement finishing quote in Trenton?+
Call (647) 424-1511, use the form on this page or email info@ontariorenovationcompany.com. Tell us what you want to change and send a few photos, and we will book a visit and send a written quote for your Trenton project.
What kinds of Trenton homes do you work on?+
All of them. Housing in Trenton includes century and heritage homes, post-war bungalows and back-splits, newer homes built since 2000 and lakefront and riverside properties, and each comes with its own considerations, from older wiring and foundations to builder warranties, septic systems and shoreline rules. We plan the work around the house you actually have.
Do I need a conservation authority permit in Trenton?+
Only if your property is in a regulated area, such as near a shoreline, river, valley, floodplain or wetland. Much of Trenton falls within the Lower Trent Conservation watershed. We check the mapping for your address before applying for the building permit.
Do I need a permit to finish my basement?+
In most Ontario municipalities, yes, particularly for new walls, bathrooms and bedrooms. A permit also protects you when you sell. We confirm the requirements and handle the application.
What if my basement has had water in it?+
We find and fix the cause first, whether that is grading, downspouts, a crack in the foundation or a plumbing issue. Finishing over an unresolved water problem just hides it.
Can you add a bedroom in the basement?+
Yes, as long as it has an egress window or exit that meets the Building Code, plus proper smoke and carbon monoxide alarms. We can enlarge an existing window opening if needed.
What flooring works best in a basement?+
Luxury vinyl plank is the most popular choice because it handles moisture and feels warmer underfoot than tile. We check the slab for moisture before recommending a product.
Do you offer basement finishing across Trenton?+
Yes. We work throughout Trenton, including Downtown Trenton, Frankford, Batawa, Murray and Bayside, and in nearby Brighton, Belleville, Cobourg, Port Hope and Peterborough.
More renovation services in Trenton
Alongside basement finishing, we also handle legal basement apartments, bathroom renovations and flooring installation in Trenton, so related work can be planned together.
Other basements, additions & outdoor services in Trenton: legal basement apartments, garden suites & detached adus, home additions and decks & outdoor living.
Further reading

Your Trenton renovation, done properly.
Tell us what you want to change and send a few photos. We will book a visit and send a clear written quote, with no obligation.
