How much does second-storey addition cost in Newmarket?

With Zigma Group, second-storey addition starts from $260 per sq ft. Prices are in Canadian dollars before HST, as of October 2026, and are confirmed after a site visit. The main factors are floor area being added; reinforcement the existing structure needs; and number of bathrooms and finish level upstairs.

Can a second storey be added to any bungalow?

Most can, but it depends on the foundation and wall structure. An engineer assesses it, and reinforcement is added where needed.

Do I have to move out for a second-storey addition?

Yes, for the main structural phase, because the roof is removed and services are disconnected at times.

Do you do second-storey addition projects in Newmarket?

Yes. We work throughout Newmarket, including Glenway, Stonehaven, Summerhill, Bristol-London and Historic Main Street. Call +1 (647) 718-3913 to arrange a visit.

Who issues the permit for this work in Newmarket?

Where a permit is needed, it is issued by the Town of Newmarket's building services. We prepare the drawings and handle the application and inspections.

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Second-Storey Addition

More space · Newmarket

Second-Storey Addition in Newmarket

Adding a second storey can double the size of a bungalow without using any of the yard. The existing house has to be able to carry it, so the work starts with the structure. In Newmarket, the housing ranges from century homes near Main Street to subdivisions built from the 1970s to the 2000s.

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Tall brick house with a narrow corner window seen from the street — From our Damavand project

Scope

What is included.

Structural assessment of foundation and walls
Design, engineering and permit drawings
Zoning review and variance applications where needed
Roof removal and new floor framing
New stair, bedrooms and bathrooms
Exterior cladding and roofing to unify the house

Cost

What it costs.

From $260per sq ft

What moves the price

Floor area being added
Reinforcement the existing structure needs
Number of bathrooms and finish level upstairs

Prices are in Canadian dollars before HST, as of October 2026. Every project is confirmed with a written quote after a site visit.

Local knowledge

Second-Storey Addition in Newmarket.

Homes like these
Subdivision lots have set building envelopes, so the usual options are a rear addition or building over the garage.
Housing
In Newmarket, the housing ranges from century homes near Main Street to subdivisions built from the 1970s to the 2000s.
Permits
Building permits in Newmarket are issued by the Town of Newmarket's building services. We prepare the drawings, submit the application and book the inspections.
Areas we cover
We work throughout Newmarket, including Glenway, Stonehaven, Summerhill, Bristol-London and Historic Main Street.
Historic Main Street
The lower Main Street area is a heritage conservation district, with heritage approval required for exterior work.
Established neighbourhoods
Many Newmarket homes are now old enough for a first full renovation of kitchens, bathrooms and basements.

Before you start

What to know.

Can the house carry it?
An engineer checks whether the foundation and walls can support another floor. Some houses need reinforcing first, and that changes the budget.
Permits and zoning
A second storey needs a building permit and must meet height and floor-area limits. Older neighbourhoods often have rules meant to keep new upper floors in scale with the street.
Moving out
The roof comes off, so the house is not liveable during the main structural phase. We plan the sequence to keep that period as short as the work allows.

How we work

One team for every stage.

AssessWe survey the house as it stands.
Design and permitsDrawings and approvals before work starts.
Strip-outWhat is worn out comes off.
RebuildStructure, wiring, plumbing and walls.
FinishesCabinetry, tile, floors and paint.
HandoverWalkthrough and documents.

Questions

Second-Storey Addition in Newmarket: the short answers.

How much does second-storey addition cost in Newmarket?: With Zigma Group, second-storey addition starts from $260 per sq ft. Prices are in Canadian dollars before HST, as of October 2026, and are confirmed after a site visit. The main factors are floor area being added; reinforcement the existing structure needs; and number of bathrooms and finish level upstairs.
Can a second storey be added to any bungalow?: Most can, but it depends on the foundation and wall structure. An engineer assesses it, and reinforcement is added where needed.
Do I have to move out for a second-storey addition?: Yes, for the main structural phase, because the roof is removed and services are disconnected at times.
Do you do second-storey addition projects in Newmarket?: Yes. We work throughout Newmarket, including Glenway, Stonehaven, Summerhill, Bristol-London and Historic Main Street. Call +1 (647) 718-3913 to arrange a visit.
Who issues the permit for this work in Newmarket?: Where a permit is needed, it is issued by the Town of Newmarket's building services. We prepare the drawings and handle the application and inspections.