Most renovation ROI articles are American. The numbers don't apply here. Ottawa is its own market: smaller, slower-turning, with a winter that punishes anything not built for it, and a Bill 23 era that has changed what "income property" means for resale value.
Below are 10 renovations with their actual Ottawa-relevant ROI ranges, drawn from Canadian Appraisal Institute studies, Ontario Real Estate Board data, and what we see in our own client resales between 2022 and 2026.
Two notes before the list. First, ROI varies by neighbourhood. The same kitchen renovation in Rockcliffe Park returns differently than in Findlay Creek. Second, ROI assumes you sell within 3 to 7 years; longer holds blur the numbers because of market drift.
1. Basement legal suite (75% to 105% ROI)
Cost drivers: egress windows, fire separation, separate HVAC, soundproofing, a second kitchen and bath, and Ottawa permit closeout. Resale impact is strong: this category routinely returns more added value than its build cost, depending on neighbourhood and rent potential.
This is the highest-ROI renovation in Ottawa right now, and it's not close. Bill 23 made secondary units permitted "as-of-right" in most Ottawa zones, and buyers value rental income at roughly 8 to 12 times annual gross rent. A well-rented legal suite can add substantially more perceived value than it cost to build, even after deducting the renovation.
Caveats: it has to be legal. An unpermitted basement apartment isn't an asset; it's a liability that scares buyers' lawyers. Legal basement conversions are our highest-ROI category for Ottawa homeowners, period.
2. Kitchen renovation (70% to 90% ROI)
Cost drivers: cabinetry (stock, semi-custom, or full custom), counter material, appliance package, layout changes, and any plumbing or electrical relocations. Resale impact: 70% to 90% of cost recovered at sale, often highest in the mid-range tier.
Kitchens drive showings. They're the single most photographed room on listings, and they decide whether a buyer scrolls past or books a tour. The ROI sweet spot is the mid-range kitchen with semi-custom cabinets and quartz counters; it returns better than the full luxury kitchen because the buyer pool is bigger.
The trap: over-improving for the neighbourhood. A luxury kitchen in a modest Barrhaven home returns less than the same kitchen in a high-value Westboro home. Match the kitchen to the house.
3. Bathroom renovation, primary ensuite (65% to 85% ROI)
Cost drivers: tile selection, shower glass, vanity and counter, waterproofing detail, heated floor, and any layout or plumbing changes. Resale impact: 65% to 85% of cost.
The primary ensuite is the second most-evaluated room in a buyer's mental scorecard. A double vanity, a curbless or low-curb shower, and a properly waterproofed wet area carry weight that exceeds the dollar spend. Spa-level finishes (heated floor, towel warmer, separate water closet) push ROI to the higher end.
Powder rooms, by contrast, return 90%+ but add small dollar value because the cost is small. They're worth doing for the listing photos, not the financial return.
4. Curb appeal exterior package (95% to 130% ROI)
Scope: front door replacement, garage door replacement, walkway, landscaping, exterior light fixtures, address numbers, and front entry porch refresh. Cost depends on how many of these items you include and the finish level chosen.
This category often returns more than it costs because it shifts the buyer's first impression. Showings convert faster, multiple offers happen at higher rates, and listing photos drive more clicks. The Canadian Appraisal Institute consistently ranks curb appeal as the highest-ROI category in dollar terms.
For Ottawa specifically: a quality fibreglass front door upgrade reliably returns more in perceived value than it costs to install. The math is exceptional.
5. Adding a second storey to a bungalow (60% to 80% ROI)
Cost drivers: footprint, structural and foundation work, roof reframing, stair placement, mechanical upgrades, and finish level. Resale impact: 60% to 80% of cost.
Ottawa has thousands of post-war bungalows in Alta Vista, the Glebe, Westboro, and Old Ottawa South. A second-storey addition turns an 1,100 sq ft, 3-bedroom home into a 2,300 sq ft, 4-bedroom-plus-ensuite home. The buyer pool expands dramatically, and the home moves into a new price band entirely.
The ROI looks lower than other categories because the absolute spend is large. In percentage terms it's modest. In absolute terms, the home value can jump into a higher price band entirely. Additions are best evaluated by total value added, not percentages.
6. Garden suite or coach house (70% to 95% ROI)
Cost drivers: foundation, site servicing (water, sewer, hydro runs), the full self-contained dwelling build, and finish level. Resale impact: 70% to 95% of cost depending on rental potential and neighbourhood zoning.
Like the basement legal suite, the coach home or garden suite has been turbocharged by Ontario's Bill 23 framework. In Ottawa, properties with rentable garden suites are listing at a measurable premium, especially in walkable neighbourhoods (Hintonburg, Westboro, Old Ottawa East) where rental demand is high.
Caveats: lot must qualify, services must be possible, and you need a real construction permit, not just a "bunkie." We do a free 48-hour lot feasibility review for Ottawa homeowners considering this.
7. Energy retrofit (insulation, windows, heat pump) (50% to 75% ROI on direct value, plus utility savings)
Cost drivers: attic and wall insulation, window count and rating, heat pump capacity, air sealing, and any electrical panel upgrades. Resale impact: 50% to 75% on the home value, plus 15-20 years of reduced utility bills.
Ottawa's climate punishes inefficient homes. Buyers in 2026 increasingly read EnerGuide labels and ask for utility bill history during conditional periods. A retrofit that takes a 1970s home from EnerGuide 65 to 80+ adds value beyond the renovation cost when the utility savings are factored in.
The federal Greener Homes Loan and Ontario incentives also reduce net cost, improving real ROI further.
The Bill 23 effect (read this if you're considering a basement or coach house)
Ontario's Bill 23 made up to three units permitted as-of-right on most Ottawa residential lots: the main house, a basement unit, and a garden suite. Properties with two or three legal units now command a meaningful premium because they're treated as income properties by lenders. Ottawa lots with full legal three-unit potential, fully built out, can list at 30% to 45% above comparable single-family homes in the same neighbourhood. This is why basement legal suites have become the highest-ROI Ottawa renovation.
8. Main bathroom renovation (60% to 80% ROI)
Cost drivers: tile area, shower or tub-shower choice, vanity width, exhaust and venting, and waterproofing. Resale impact: 60% to 80% of cost.
Different from the primary ensuite, the main bathroom serves the rest of the household and any guests. It needs to be functional and clean rather than spa-like. ROI plateaus quickly past mid-range; a well-finished mid-range main bath returns about the same as a top-tier one in resale terms.
The smart spend: tile to ceiling in the wet zone, low-curb shower with frameless glass, double vanity if width allows, proper exhaust fan vented outside. Skip the heated floor and steam shower for the main bath; save those for the ensuite.
9. Open-concept main floor (50% to 70% ROI)
Cost drivers: whether the wall is load-bearing, beam size and span, temporary shoring, floor and ceiling refinishing, and electrical relocations. Resale impact: 50% to 70% of cost.
The ROI on this one has been declining since the peak of open-concept demand around 2019. Some buyer segments now prefer separate rooms (office, kid zones, guest privacy). Still, for older Ottawa homes with chopped-up main floors (1950s-1970s in particular), opening up the kitchen-dining-living sightline modernizes the home substantially.
The ROI varies by neighbourhood. Westboro and the Glebe still reward open-concept. Newer Stittsville and Findlay Creek already have it as standard, so the renovation doesn't add value the same way.
10. Garage door, front door, and front-facing windows (75% to 95% ROI)
Cost drivers: door material and style, window count and size, and how many openings are involved. Resale impact: 75% to 95% of cost.
This is the smallest-dollar entry on the list, and it's also one of the most reliably high-percentage. A new garage door alone (real wood-look fibreglass, not stamped steel) routinely returns 90%+ in studies. A quality front door and front-facing window replacement perform similarly well per dollar spent.
Combined, these three items reset the home's facade without touching the roof, siding, or structure. For homeowners who aren't ready for a full kitchen renovation but have a smaller budget to work with, this is the highest-impact move for the money.
The renovations that don't return what you'd think
Not on the list, and for good reason:
- In-ground pools in Ottawa: Often a net negative on resale. The 5-month season versus the maintenance cost works against you.
- Sunrooms and three-season additions: 25% to 45% ROI. Buyers don't value the heating or cooling shoulder months as much as the cost suggests.
- Highly personalized home theatres: A large spend that returns only a fraction at resale. The next owner converts it to a guest room.
- Designer wallpaper and feature walls: Painted over within 18 months by 70% of buyers we talk to.
- Detached gym buildings: Usually treated as outbuildings with little appraisal lift.
The best ROI renovations are the ones that expand who can buy your house, not the ones that show how much you spent.
How to think about ROI before you start
If resale matters to you, the order of priority for an Ottawa homeowner is roughly:
- Add a legal income unit if zoning allows (basement or garden suite)
- Update the kitchen if it's pre-2010 builder grade
- Refresh the primary ensuite
- Curb appeal package
- Energy efficiency retrofit
- Main bathroom
- Anything else
That order shifts based on what you have and don't have. A 1995 Ottawa home with an unrenovated kitchen but a finished basement starts at #2. A 1955 Alta Vista home with potential for an income unit and a 1990s kitchen starts at #1.
If you want help figuring out the highest-ROI sequence for your specific Ottawa property, that's part of what we do during our free consultation. For 20 years we've watched Ottawa renovations through to resale and we know which moves the market values today (not what it valued in 2018).
The renovation that pays back is rarely the most expensive one. It's usually the one matched correctly to your house, your neighbourhood, and the buyer pool that will eventually walk through your front door.