Secondary Suite Conversions in Kelowna
Turn a basement, garage, or unused wing into a legal, separately metered rental unit with its own entrance. Lower cost and a shorter timeline than a detached build.
Written by Serge, Founder, Kelowna Carriage Homes
What makes a suite legal
A legal secondary suite is a self-contained unit inside your house or an accessory building: its own kitchen, bathroom, and entrance, with a fire separation from the main dwelling and, in most cases, a separate hydro meter. The City checks ceiling height, bedroom egress windows, smoke and CO alarms, sound separation, and one added parking stall.
Conversions generally cost about $60,000 to $150,000, depending on how much structural, egress, and servicing work the space needs. A one-bedroom in Kelowna rented near the CMHC 2025 average of $1,596 a month, sometimes a little below for a suite. Most owners fund the work through a home-equity line of credit at about prime plus 0.5%, or by refinancing, and the rent covers the payment. Because you are working with an existing shell, the timeline is usually shorter than the 3 to 5 months of permitting plus 5 to 8 months on site a carriage home takes.
If your lot is large and you want maximum rent and resale value, a detached carriage home is usually the stronger choice. If you want the lowest cost and already have the space, a suite wins. We say which one fits in the feasibility study.
Zoning still applies. Most single-family lots in Kelowna’s RU zones permit one suite, and provincial small-scale multi-unit housing rules have widened what is allowed; see permits & zoning. Grant status and funding are on the financing & incentives page.
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How a conversion runs
Five stages, each signed off before the next.
Assessment
Site visit, code check on the existing space, cost range, projected rent. Free.
Design & fixed price
Layout, egress and fire-separation plan, finish selections, locked price.
Permits & funding
Building permit submission and your refinance or HELOC paperwork.
Construction
Framing, plumbing, electrical, separate metering, finishes.
Final & handover
Inspections, occupancy, and a rental-ready walkthrough.
Basement, garage, or attached addition: which conversion fits
Basement conversions are the most common and usually the least expensive, provided the ceiling height already clears 1.95 m (about 6′5″) or can reasonably be brought to it by lowering the slab. Existing plumbing rough-ins and a walk-out grade both cut cost meaningfully; a fully below-grade basement with no existing walk-out is the most expensive basement scenario, because of the excavation an exterior entrance requires.
Garage conversions trade parking for living space, which some City zones require you to replace elsewhere on the lot. They are straightforward structurally, since the shell and roof usually stay, but often need a full new building envelope for insulation and moisture control, since garages are rarely built to residential code.
An attached addition, built onto the side or rear of the house, costs the most per square foot of the three but is the only option when the existing structure has no usable space to convert. We size and cost all three, where more than one applies to your property, in the feasibility study.
Suite or carriage home: which fits your lot
A secondary suite usually wins on cost and timeline: you are converting space you already own, so there is no new foundation, no new roof, and permitting is simpler. It suits owners who want rental income without touching the yard, or whose lot is too small or too tight on setbacks for a detached build.
A carriage home costs more and takes longer, but it rents for more, keeps the main house and the rental fully separate, and adds a standalone structure that generally lifts resale value further than a suite does. It needs more site: enough room for the unit itself, required setbacks, and usually a parking stall that does not already exist.
Lot size is the first filter. Under about 5,500 to 6,000 sq ft, a suite is typically the only option that fits without a variance. Above that, both are usually on the table, and the choice comes down to budget, timeline, and whether you want the two households sharing a roof or not. We tell you which options your specific lot supports in the carriage home or suite feasibility study, at no cost.
Because a suite shares walls or a floor with your own living space, sound separation is worth taking seriously beyond the code minimum. We typically specify resilient channel and additional insulation in shared floor and wall assemblies, which costs more than the bare code requirement but meaningfully cuts noise transfer both ways. It is one of the more common regrets we hear about suites built by others: the code minimum passes inspection but does not feel private day to day.
Cost, rent, and the usual worries
“This costs too much.” A suite is about $60,000 to $150,000. Financed on a HELOC near 4.95%, the payment on $100,000 is roughly $550 to $800 a month, and a one-bedroom rent near $1,596 covers it with room to spare.
“What if tenants damage it?” Screen for credit, employment, and references, and carry landlord insurance. Damage beyond a deposit is rare and is what the policy is for.
“Will it hurt resale?” A legal, permitted suite adds documented income. In Kelowna that raises the price, it does not lower it. An unpermitted suite is the one that scares buyers.
What can change your price
The $60,000 to $150,000 range assumes standard conditions: adequate ceiling height, an existing or easily added exterior door location, and a service panel with room for a second meter. Low ceiling height that needs slab lowering, a furnace or water heater that has to move to make room for the suite, and difficult sound-separation requirements between floors each add cost, usually in the $10,000 to $30,000 range depending on scope.
Older homes sometimes need knob-and-tube or aluminum wiring addressed as part of the permit, and a septic system rather than city sewer can add a review step. As with a carriage home, we confirm which of these apply to your specific space before the price is fixed in the contract, not after.
Secondary suite questions
More on the FAQ page.
Can any basement become a suite?
Do I need a separate entrance?
Is there still a grant for this?
Can I short-term rent it?
One suite or two?
Does my mortgage lender need to approve the conversion?
My basement ceiling looks low. Does that rule it out?
Related services
Carriage home construction
A detached one- or two-bedroom home in the back yard, on the same title.
Learn more →Permits & zoning navigation
Lot analysis, variances, and City submissions handled for you.
Learn more →Basement suite conversion
Permits, cost drivers, and what a basement needs to qualify.
Learn more →Multi-generational additions
Suite, addition, or detached unit for housing family.
Learn more →See what fits behind your house
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Costs, timelines, rents, and incentive amounts on this page are estimates from the sources cited, current as of September 2026. Each is confirmed in writing in your free feasibility study. Licensed and insured; documentation available on request.