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In-Law Suite Renovations in Ottawa
More Ottawa families are choosing to live under one roof, whether that means welcoming aging parents, making room for an adult child, or keeping a caregiver close by.
An in-law suite makes it work without the cramped bedrooms and shared bathrooms, giving your relatives a complete space of their own: a private bedroom, bathroom, kitchen, and separate entrance.It is also one of the smartest additions you can make.
A well-built in-law suite keeps your family close and independent today, and can become rental income or added resale value tomorrow.
OGC designs, permits, and builds the whole thing as one team, so yours is a proper, code-approved second unit, not just a finished room.
Get a free no-obligation quote for your next project in seconds.
Keep Family Close, With a Place of Their Own
An in-law suite is a complete, self-contained home inside or beside your own: a private bedroom, bathroom, kitchen, and separate entrance. It is how Ottawa families keep aging parents, an adult child, or a caregiver close, while everyone keeps their independence and privacy.
What you call an in-law suite, the City of Ottawa calls an additional dwelling unit or secondary dwelling unit. Thanks to recent provincial rules, most Ottawa lots can now hold up to three units in total, so a well-built in-law suite can house family today and add rental income or resale value later. OGC designs, permits, and builds the whole thing under one roof.
- A private bedroom, bathroom, kitchen, and separate entrance
- Built in a basement, a main-floor addition, above a garage, or as a coach house
- Designed to meet Ottawa's additional dwelling unit rules and the Building Code
- Fixed pricing, permits handled, and a 7-year warranty
How Our In-Law Suite Renovations in Ottawa Work
An in-law suite is a full second home, not just a finished room, so it has to be designed and permitted as a legal unit. Here is the design-build process OGC follows from first idea to a finished, inspected suite.
We start at your home to find the best place for the suite, a basement, a main-floor addition, above the garage, or a detached coach house, and check what your lot's zoning allows before you spend on design.
- On-site review of the best location for the suite
- Check of how many units your lot can legally hold
- Honest feasibility read and a budget range up front
We design a complete, self-contained unit and, when it is for aging parents, build in accessibility from the start: a single-level layout, a step-free entrance, and wider doorways. You see it all in 3D before we build.
- Full suite layout with its own kitchen, bath, and entrance
- Optional step-free, single-level design for aging in place
- 3D renderings so you approve the suite before construction
An in-law suite is a change of use in the eyes of the City, so it needs a building permit and has to meet the Ontario Building Code for fire separation, sound, and egress. Our registered designers prepare the drawings and we manage the full City of Ottawa permit.
- Additional dwelling unit compliance confirmed for your lot
- Fire separation, sound control, and egress designed in
- Building permit and Change of Use review handled by OGC
Before construction begins, you get a detailed, fixed-price contract covering the full scope. The number you approve is the number you pay, backed by our price-match guarantee.
- Line-by-line scope with no vague allowances
- Fixed price with no surprise change orders
- Financing options available for qualified homeowners
One dedicated project manager runs the build: the separate entrance, the second kitchen, fire and sound separation between the units, egress windows, and independent heating and ventilation for the suite.
- Separate entrance and a full second kitchen built
- Fire-rated and sound separation between the two units
- Egress windows and independent HVAC for the suite
We walk the finished suite with you, book the City's final inspection, and hand over a 7-year warranty so your investment is protected long after the family moves in.
- Detailed walkthrough and deficiency review with you
- Final City of Ottawa inspection booked and passed
- Industry-leading 7-year OGC warranty handed over
Our In-Law Suite Portfolio
A sample of in-law suites, secondary suites, and coach houses we have designed and built for families across Ottawa.
Why Ottawa Homeowners Choose OGC
For over a decade, OGC has been one of Ottawa's most trusted in-law suite builders and the city's most reviewed design-build firm, with 200+ verified reviews across Google, Houzz, and HomeStars.
Design-Build, Not Just a Contractor
Unlike many in-law suite companies, we keep design, engineering, permits, and construction in-house. One accountable team handles the zoning, the Building Code, and the build from first sketch to final inspection.
One Dedicated Project Manager
A single project manager runs your entire suite and stays reachable by phone or text the whole way through. No handoffs, no gaps, no wondering who is in charge.
See It Before We Build It
Every suite starts with full 3D renderings so you and your family can see the finished space before construction begins. Change it on screen, not on site.
Fixed Pricing, No Surprises
What you are quoted is what you pay. No hidden fees, no mid-project change orders. OGC's price-match guarantee backs every contract we write.
Industry-Leading 7-Year Warranty
OGC backs every in-law suite with a 7-year warranty, one of the strongest in Ottawa. A suite for your family is a major investment, and your peace of mind should match it.
Ottawa's Most Recognized Renovation Team
OGC is a member of the GOHBA, Tarion, RenoMark, CHBA, and the Ottawa Chamber of Commerce, and has been named Ottawa's Small Business of the Year. Our work has been featured on CTV, HGTV, and in Ottawa press.
In-Law Suites in Ottawa: What's Involved
The difference between a finished room and a legal in-law suite is in the details. Here is what we manage to make yours a proper, approved second unit.
Most Ottawa lots can now hold up to three units in total, your home plus as many as two additional dwelling units, for example a basement suite plus a detached coach house. No extra parking is required for an added unit. We confirm exactly what your specific lot allows before design.
A full second kitchen and a private entrance are what turn a finished room into a legal additional dwelling unit. We design the suite as a genuinely self-contained home so it qualifies, appraises, and can be rented if you ever choose to.
The Ontario Building Code requires a fire-resistant separation and sound control between two units, so a fire, or the noise of daily life, does not pass from one home to the other. This is core to every legal suite and we build it in, not around.
Every bedroom needs a proper egress window for escape, which usually means enlarging an opening or adding a window well. A basement suite also needs adequate ceiling height, often around 1.95 m (6 ft 4 in), and the Code gives existing homes some allowance. We confirm both before committing to a basement suite.
A suite needs a building permit and a Change of Use review, its own heating and ventilation, and electrical brought to ESA standards. The separate entrance is often the single biggest structural item. We handle the permits and coordinate every trade so the suite is fully approved.
What an In-Law Suite Costs in Ottawa
Cost depends mostly on the type of suite, since a basement conversion, an addition, and a detached coach house are very different builds. Here is the range Ottawa homeowners are working within.
in-law suite
or above-garage suite
in the backyard
Suite Type & Foundation
Finishing an existing basement is the most affordable route. A new addition or an above-garage build adds structure and foundation, and a detached coach house is a full new building, so it sits at the top of the range.
Kitchen, Bathroom & Entrance
A full second kitchen, a new bathroom, and a separate entrance are the three biggest line items in any suite. The separate entrance in particular, especially a basement walkout, is often the largest single structural cost.
Separation, HVAC & Finishes
Fire and sound separation, independent heating and ventilation, upgraded electrical, and your choice of finishes all move the total. Where you spend on finishes is the lever you control most.
Want the full breakdown by suite type? Read our detailed guide to secondary dwelling unit costs in Ottawa.
In-Law Suite Questions
The questions Ottawa homeowners ask us most before building an in-law suite.
An in-law suite is a self-contained living space with its own bedroom, bathroom, kitchen, and private entrance, built for a family member while keeping everyone's independence. "In-law suite" is the everyday name for what the City of Ottawa calls an additional dwelling unit or secondary dwelling unit. It can be attached (a basement, addition, or above-garage suite) or detached (a coach house).
It depends heavily on the type of suite. A basement in-law suite typically runs about $70,000 to $150,000, a main-floor addition or above-garage suite roughly $150,000 to $300,000, and a detached coach house $300,000 and up. The kitchen, bathroom, and separate entrance are the biggest cost drivers. See our full secondary dwelling unit cost guide for a detailed breakdown.
In most cases, yes. Under current provincial and City of Ottawa rules, most residential lots can hold up to three units in total, so you can usually add one or even two additional dwelling units. Whether your specific lot qualifies depends on its zoning, servicing, and size. We confirm exactly what is allowed at your free consultation. Learn more about additional and secondary dwelling units in Ottawa.
Yes. Adding an in-law suite is a change of use that requires a City of Ottawa building permit and a review for Ontario Building Code compliance, including fire separation, sound, egress, and ventilation. OGC prepares the drawings with a registered designer and handles the entire permit process for you.
To be a legal, self-contained additional dwelling unit, yes. A full second kitchen and a separate entrance are what distinguish a real suite from a finished bedroom or in-law space. They also protect the suite's value and let you rent it legally if your plans change down the road.
Often, yes, and it is usually the most affordable option. The two things to confirm are ceiling height (a basement suite needs adequate height, often around 1.95 m or 6 ft 4 in, with an allowance for existing homes) and a compliant egress window in each bedroom. We check both before you commit, and manage moisture and waterproofing as part of the build.
Yes, once it is a legal additional dwelling unit, you can rent it long-term, which is why many families build a suite that houses a relative now and becomes a mortgage helper later. Short-term rentals are treated differently and need a City host permit. Depending on who the suite is for, you may also be eligible for federal support such as the Multigenerational Home Renovation Tax Credit. We are glad to point you to the current programs.
Areas We Serve
OGC designs and builds in-law suites across Ottawa and the surrounding region, including:
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Quick Response
You'll receive a response from a specialist within 24 hours.
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Unbiased Advice
Expert face-to-face advice for your renovation project.
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No Commitments
There's absolutely no pressure or commitment to buy.
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Fixed Pricing
No surprises, and no hidden fees.
no-obligation quote
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Visit us
1886 Merivale Road #200, Nepean, ON K2G 1E6Sit with a specialist and visit our design center.
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