How much does a second storey add to my home's resale value in Ottawa?

How much a second storey adds to resale value depends on your neighbourhood, the quality of the work and how buyers in your local market value extra space. There's no reliable percentage or dollar figure that applies across Ottawa, so be cautious of anyone who promises a specific return. A real estate agent who knows your street and can pull comparable sales is the best source for a value estimate before you commit.

The core comparison is simple: what do two-storey homes similar to your finished result sell for nearby, compared with bungalows like yours today? The gap between those, minus the full project cost, is the honest way to think about value. In established neighbourhoods where two-storey homes are in demand, that gap can be meaningful. In areas where larger homes are plentiful, the gap may be smaller. Construction cost is driven by your house and your choices, while resale value is driven by buyer demand, so the two don't move together.

Several factors shape what buyers will pay:

• Bedroom and bathroom count. Moving from a smaller bungalow to a family-sized layout with more bedrooms and a second full bathroom can put a home in a different buyer category.
• Design coherence. A second storey that looks like it was always part of the house is worth more than one that looks tacked on. That means matching materials, consistent window proportions and a roofline that fits. A good designer can earn their fee here; ask for a written fee quote.
• Quality and paperwork. Buyers and their inspectors will look for permits and final inspections. A second-storey addition needs a building permit, since structural alterations and one- and two-storey additions are on the City's permit list, and both owner and contractor are responsible for obtaining it.
• Fit with the street. An addition that overshadows its neighbours or ignores the neighbourhood's character can work against you.

Remember the ongoing costs. An addition can change your property assessment, which affects property taxes, so ask MPAC how assessments are updated after a major renovation.

The best reason to add a second storey is usually that you need the space and plan to stay; resale value is a bonus to check, not a guarantee. Renovators aren't licensed by the HCRA the way new home builders are, so get warranty terms in writing. Ask each contractor whether they have WSIB coverage or are exempt. Then browse addition contractors in the Ottawa Construction Network directory and compare itemized quotes.

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Looking for experienced contractors? The Ottawa Construction Network connects homeowners with qualified professionals:

• Justyn Rook Contracting
• JC Carpentry
• Jaiko Cleaning Services
• Demontigny Carpentry
• Speedy Pete's Inc

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