How much does basement renovation cost in Richmond Hill?

With Zigma Group, basement renovation starts from $32 per sq ft, and most projects fall between $36,000 and $85,000. Prices are in Canadian dollars before HST, as of October 2026, and are confirmed after a site visit. The main factors are finished floor area; adding a bathroom, bar or laundry; and waterproofing or ceiling-height work needed first.

Do I need a permit to finish my basement in Ontario?

Often, yes. A permit is usually required if you add or move plumbing, change heating, alter structure or add an entrance. Simple cosmetic work may not need one. We check with your municipality.

Can you add a bathroom in a basement?

Yes. It depends on where the main drain is and whether the new fixtures can drain by gravity or need a pump. We check this at the first visit.

Do you do basement renovation projects in Richmond Hill?

Yes. We work throughout Richmond Hill, including Oak Ridges, Bayview Hill, Mill Pond, South Richvale and Jefferson. Call +1 (647) 718-3913 to arrange a visit.

Who issues the permit for this work in Richmond Hill?

Where a permit is needed, it is issued by the City of Richmond Hill's building department. We prepare the drawings and handle the application and inspections.

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Basement Renovation

Basements · Richmond Hill

Basement Renovation in Richmond Hill

A finished basement adds a full floor of living space without changing the outside of the house. Done properly, it starts with keeping the space dry and warm. In Richmond Hill, the housing runs from older homes around Mill Pond to large executive houses in Bayview Hill and South Richvale.

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Finished room with wood flooring, recessed ceiling lighting and solid wood doors — From our Abtin project

Scope

What is included.

Moisture and foundation assessment
Insulation, framing and subfloor
Bathrooms, bars and laundry rooms
Electrical, lighting and heating
Egress windows and new entrances
Flooring, ceilings, doors and trim

Cost

What it costs.

From $32per sq ft

Most projects in Richmond Hill: $36,000 to $85,000

What moves the price

Finished floor area
Adding a bathroom, bar or laundry
Waterproofing or ceiling-height work needed first

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

Basement Renovation in Richmond Hill.

Homes like these
Subdivision basements are typically full height with poured concrete walls and a bathroom rough-in, which makes finishing straightforward.
Housing
In Richmond Hill, the housing runs from older homes around Mill Pond to large executive houses in Bayview Hill and South Richvale.
Permits
Building permits in Richmond Hill are issued by the City of Richmond Hill's building department. We prepare the drawings, submit the application and book the inspections.
Areas we cover
We work throughout Richmond Hill, including Oak Ridges, Bayview Hill, Mill Pond, South Richvale and Jefferson.
Oak Ridges Moraine
The northern part of Richmond Hill lies on the Oak Ridges Moraine, where additions and new buildings face extra environmental rules.
Larger homes
Many Richmond Hill houses are big enough that renovating in phases, floor by floor, is a realistic option.

Before you start

What to know.

Permits
In most GTA municipalities, finishing a basement needs a building permit when the work involves structural changes, new plumbing, heating changes or a new entrance. We confirm what applies to your address.
Water first
Any leak, damp wall or drainage problem has to be fixed before framing goes up. Finishing over moisture leads to mould behind the walls.
Ceiling height
Low ceilings, ducts and beams limit what a basement can become. If more height is needed, underpinning can lower the floor.

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

Basement Renovation in Richmond Hill: the short answers.

How much does basement renovation cost in Richmond Hill?: With Zigma Group, basement renovation starts from $32 per sq ft, and most projects fall between $36,000 and $85,000. Prices are in Canadian dollars before HST, as of October 2026, and are confirmed after a site visit. The main factors are finished floor area; adding a bathroom, bar or laundry; and waterproofing or ceiling-height work needed first.
Do I need a permit to finish my basement in Ontario?: Often, yes. A permit is usually required if you add or move plumbing, change heating, alter structure or add an entrance. Simple cosmetic work may not need one. We check with your municipality.
Can you add a bathroom in a basement?: Yes. It depends on where the main drain is and whether the new fixtures can drain by gravity or need a pump. We check this at the first visit.
Do you do basement renovation projects in Richmond Hill?: Yes. We work throughout Richmond Hill, including Oak Ridges, Bayview Hill, Mill Pond, South Richvale and Jefferson. Call +1 (647) 718-3913 to arrange a visit.
Who issues the permit for this work in Richmond Hill?: Where a permit is needed, it is issued by the City of Richmond Hill's building department. We prepare the drawings and handle the application and inspections.