Ottawa's N1–N4 Neighbourhood Zones

Ottawa Zoning By-law 2026-50 replaced the old building-type R-zones with size-based Neighbourhood zones, N1 through N4. Your lot's N-zone sets how many units and how much height your multiplex can have. Find your zone first; everything else follows from it.

The Four Zones

Zone	Role	Units / building	Height
N1	Lowest-density neighbourhood core	Up to 4	≈ 11 m (about 3 storeys)
N2	Neighbourhood edge / slightly more density	Up to 6	≈ 11 m (about 3 storeys)
N3	Neighbourhood general / low-rise apartment	Up to 10	Low-rise, taller than N1/N2
N4	Higher-density near transit and urban cores	Mid-rise apartment scale	Mid-rise

Unit caps and heights summarize the size-based Neighbourhood zones in By-law 2026-50. Confirm the exact schedule for your parcel on geoOttawa and the City by-law page.

Old R-Zone → New N-Zone

If you knew your lot's old residential zone, this is roughly where it lands now. The mapping is approximate — location and overlays shift some lots — so always confirm on geoOttawa.

R1 — Residential First Density (detached) → N1 — lowest-density neighbourhood core

R2 — Residential Second Density (semi) → N1 / N2 — depending on location

R3 — Residential Third Density (townhouse) → N2 — neighbourhood edge

R4 — Residential Fourth Density (low-rise apt) → N3 — neighbourhood general / low-rise apartment

R5 — Residential Fifth Density (higher) → N4 — higher density near transit

Best For

✓ Translating a lot's old R-zone into its new N1–N4 Neighbourhood zone.
✓ Seeing the unit count and height each Neighbourhood zone allows.
✓ Knowing which zone you need before assuming a multiplex size.

Usually Fails When

✕ You rely on the R-to-N mapping without checking geoOttawa — overlays and location move some lots.
✕ You read the unit cap as guaranteed buildable — lot standards still govern what fits.

What To Verify Before Spending Money

→ Your parcel's N-zone on geoOttawa under the New Zoning By-law 2026-50 layer.
→ The lot-area, frontage, and height schedule attached to that zone.
→ Any overlay (heritage, flood, transit) that modifies the base zone.

Frequently Asked Questions

What are Ottawa's N1, N2, N3, and N4 zones? +

They are the new size-based Neighbourhood zones in Ottawa Zoning By-law 2026-50. N1 is the lowest-density neighbourhood core (up to four units), N2 is the neighbourhood edge with more density (into the six-unit range), N3 is neighbourhood general allowing low-rise apartments (about ten units), and N4 is higher-density near transit at mid-rise scale.

What zone replaced R1 in Ottawa? +

The old R1 residential zone generally maps to the new N1 Neighbourhood zone — the lowest-density category, which still permits up to four dwelling units as-of-right on a serviced lot. The exact new zone for any parcel is shown on the City's geoOttawa map under the New Zoning By-law 2026-50 layer.

How do I find my lot's Neighbourhood zone? +

Open geoOttawa, search your address, and enable the New Zoning By-law 2026-50 layer. It shows your N-zone and the schedules that set lot area, frontage, height, and unit count. That zone determines how large a multiplex you can build as-of-right.

Why did Ottawa switch from building-type zones to size zones? +

Building-type zoning fixed what form was allowed — detached, semi, townhouse — which blocked multiplexes even where they would have fit. Size-based Neighbourhood zones regulate the envelope (units, height, lot coverage) and let the builder choose the form, which is what re-legalizes the missing middle.

Official Sources Referenced

City of Ottawa: New Zoning By-law 2026-50

https://ottawa.ca/en/planning-development-and-construction/zoning/new-zoning-law

City of Ottawa: New Zoning By-law (Engage Ottawa)

https://engage.ottawa.ca/zoning

Bill 23, More Homes Built Faster Act, 2022 (full text)

https://www.ola.org/en/legislative-business/bills/parliament-43/session-1/bill-23

Province of Ontario: More Homes Built Faster Act overview

https://www.ontario.ca/laws/statute/s22021

City of Ottawa: geoOttawa interactive zoning map

https://maps.ottawa.ca/geoottawa/

General information, not legal advice. Zoning and permitting rules are set by the City of Ottawa and the Province of Ontario, and both change over time. Verify current requirements directly with the City of Ottawa Planning Department before making a decision.

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