Provincial planning update
Ontario More Homes Built Faster Act, in plain English
The Ontario More Homes Built Faster Act (Bill 23) landed in 2022 and set off a chain of changes at the provincial and municipal level. Most of the reporting focused on developer economics: reduced development charges, faster approvals, and a hard housing target. For a homeowner, the more useful lens is: what changed on my street, on my lot, and in the process I would follow to add a unit. This guide walks through the parts of the Act that homeowners actually feel. It covers the four-unit-as-of-right direction, changes to secondary unit permissions, the streamlining of garden suite and coach house rules, and the development charge relief that flows through to certain small projects. The Act is provincial, so it interacts with each municipality's own bylaws. Ottawa is folding these changes into its transition to a new comprehensive zoning bylaw, so the exact wording on your street can shift with each amendment cycle. Use this guide for the direction, and confirm the current text before committing to a design.
As-of-right density: what changed and what did not
The Act requires Ontario municipalities to permit up to three units on most lots that already permit a single detached, semi detached, or townhouse dwelling. Combined with an existing principal dwelling, that is the four-unit-as-of-right idea people talk about.
What did not change: the building code, servicing capacity, and the zoning envelope. As-of-right means the density is a permitted use. It does not mean four units automatically fit.
- Density permission: yes, opened up on most residential lots.
- Envelope rules: still apply.
- Building code: still applies.
- Servicing: still has to be confirmed.
Secondary unit permissions
The Act built on earlier provincial direction requiring municipalities to permit at least one secondary unit in a principal dwelling and one detached secondary unit on residential lots. Ottawa had already broadly permitted secondary dwelling units and coach houses before Bill 23. What the Act did was standardize this direction across the province and remove the ability of municipalities to over-restrict.
For a homeowner considering a basement apartment or a coach house, the practical effect is that the base zoning conversation is much shorter than it used to be. The conversation is now about envelope and servicing, not permission.
Garden suite and coach house streamlining
The Act pushed municipalities to streamline detached secondary unit rules, including garden suites and coach houses. In Ottawa, coach house permissions were already in the bylaw, so the streamlining shows up as tighter integration of servicing, permit routing, and the treatment of additional units on the same lot.
For a homeowner, this shifts more of the difficulty to the physical questions (does the lot fit a detached unit, can it be serviced, does it leave a livable primary house) rather than the paper questions (is this even permitted).
Development charge relief
The Act reduced or waived development charges for certain kinds of small residential projects, particularly additional units created within an existing residential building and detached secondary units. The precise scope has been adjusted through subsequent amendments and municipal implementation.
For a homeowner, the direction is that adding a unit to an existing house is treated more favourably than it used to be. The exact numbers depend on the current City of Ottawa development charge bylaw and any provincial adjustments. Confirm the current figure before penciling it into a budget.
Approval process changes
The Act also pushed changes to the approval process itself: shorter timelines for certain applications, restrictions on third-party appeals for some minor variance decisions, and changes to how site plan control applies to smaller projects.
For a homeowner, the practical effect is fewer opportunities for a small project to get bogged down at the appeal stage, which was one of the ways past projects lost their financial case even when they were straightforwardly compliant.
- Reduced timelines for certain applications.
- Restrictions on third-party appeals for certain minor variances.
- Reduced site plan control application for smaller residential projects.
- Overall direction: fewer procedural drag points on small housing.
Things the Act did not change
The Act did not remove the Ontario Building Code. It did not remove conservation authority regulated areas, heritage designations, or the fundamental role of servicing capacity in deciding whether a unit is buildable. It also did not remove the responsibility of the homeowner to check what applies to their specific lot.
A common misread is that Bill 23 makes any four-unit idea automatic. That is not the reading a planner or a building official gives. The Act removes barriers at the density layer and streamlines process, but every other layer still governs.
Frequently asked questions
Does the More Homes Built Faster Act override my local bylaw?
It sets the floor. Municipalities can permit more than the Act requires, but they cannot permit less. Local bylaws still supply the specific numeric standards.
Can I now build four units on any residential lot in Ontario?
Up to four units are treated as a permitted use on most residential lots, but envelope, servicing, and building code constraints still decide whether four units actually fit.
Are development charges really lower for a basement apartment?
Additional residential units inside an existing house receive significant development charge relief under the Act, subject to the current municipal DC bylaw and any provincial adjustments.
Does the Act change heritage or floodplain protection?
No. Heritage designations, conservation authority regulated areas, and similar protections continue to apply.
Does Ottawa already comply with the Act?
Ottawa has been folding the Act's requirements into its zoning bylaw and its transition to a new comprehensive bylaw. Compliance is ongoing, and specific wording continues to be refined.
Does the Act affect condo or apartment projects?
The residential unit provisions target lots that permit low-rise residential uses. Other parts of the Act touch the broader approval framework that applies to larger projects, including timelines and appeal rights.
Where can I read the Act itself?
The full text is on the Ontario government's legislation site. For municipal application, cross reference the current City of Ottawa zoning bylaw and Official Plan.