Basements, Additions & Outdoor · Trenton
Legal Basement Apartments in Trenton
Secondary suites built to the Ontario Building Code and Fire Code, with the permit, egress and fire separation done properly.
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Trenton, Northumberland & Quinte
Legal Basement Apartments in Trenton
In Trenton, homeowners are adding legal secondary suites to help with the mortgage and to keep family close. The key is building one properly, with a permit, so the unit is safe, insurable and adds value when you sell.
Before we quote a Trenton basement apartment, we confirm the City of Quinte West's requirements for your property. Then we plan fire separation, egress windows, the entrance, alarms, the suite kitchen and bathroom, and the permit, so the unit is legal from day one.
We also bring existing Trenton basement units up to code: assessing fire separation, exits, ceiling height and alarms, and doing the permit and work needed to make the suite legal.
Call (647) 424-1511 or send the form on this page for a free basement apartment 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 legal basement apartments involves in Trenton's houses
Century and heritage homes in Trenton
Older Trenton homes can take a legal basement apartment, but the work is heavier: low ceilings may need underpinning, stone foundations need careful moisture work, and fire separation has to be built continuously through irregular framing. A second exit and egress windows are often the deciding factors.
Post-war bungalows and back-splits in Trenton
Trenton's post-war bungalows are among the best houses for a basement apartment. The side door at grade often gives the suite its own entrance, the footprint gives room for a kitchen, bathroom and one or two bedrooms, and the Building Code includes some allowances for houses that have stood for years.
Newer homes built since 2000 in Trenton
Newer Trenton homes with a roughed-in basement bathroom and good ceiling height are strong candidates for a suite. Where the builder offered a separate side entrance it saves significant work. Engineered floor joists above need a fire separation designed for that type of floor.
Lakefront and riverside properties in Trenton
For lakefront and riverside homes around Trenton, a basement suite needs good moisture control and an exit above any flood risk, and part of the property may be regulated by the conservation authority.
Rules in Trenton
Permits and approvals for legal basement apartments 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.
Additional residential units
Since the province's More Homes Built Faster Act (2022), most urban serviced lots in Ontario with a detached house, semi or townhouse can have up to three units: the main home plus two additional units, one of which may be in a separate building. Municipalities still set zoning details, and the province limits how much parking they can require. The City of Quinte West applies these rules locally, and every unit needs a building permit and must meet the Building Code and Fire Code.
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
Legal Basement Apartments, Built to Code
A legal basement apartment, also called a secondary suite or additional residential unit, can bring in rental income, house a family member or help an adult child stay close to home. Ontario's rules now allow additional units in many houses, but a suite is only legal when it is built under a building permit and meets the Ontario Building Code and Fire Code.
The details that make a suite legal are the same ones that make it safe: fire separation between the units, smoke and carbon monoxide alarms, a proper exit and egress windows from bedrooms, adequate ceiling height, separate heating considerations, and the right electrical and plumbing. Zoning, parking and entrance requirements vary from one municipality to the next.
More about legal basement apartments →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
Legal Basement Apartments 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
Legal Basement Apartments in Trenton: FAQs
How do I get a legal basement apartments 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.
Can I legally put an apartment in my basement?+
In many Ontario municipalities, yes. Provincial rules allow additional residential units in many houses, but zoning, lot, parking and entrance rules vary locally, and every unit needs a building permit. We check what your property allows before you commit.
What makes a basement apartment legal?+
It must be built under a building permit and pass inspection, meeting the Ontario Building Code and Fire Code for fire separation, exits, egress windows, ceiling height, alarms, electrical and plumbing.
Does a basement apartment need a separate entrance?+
Often, though requirements depend on the municipality and the layout. A side or rear entrance with a properly built stairwell is a common part of our suite projects.
Can you legalize an existing basement apartment?+
Often, yes. We assess the existing suite against the code, list what needs to change, such as fire separation, alarms, egress or ceiling height, and handle the permit and work to bring it into compliance.
Do you offer legal basement apartments 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 legal basement apartments, we also handle garden suites and detached ADUs, basement finishing and bathroom renovations in Trenton, so related work can be planned together.
Other basements, additions & outdoor services in Trenton: basement finishing, 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.