Do You Need a Permit for a Bathroom Renovation in Newmarket?

When homeowners in Newmarket start planning a bathroom remodel, one of the first questions that comes up is whether the project needs a municipal building permit. Pulling a permit when required protects you when you eventually sell the house, prevents issues with your home insurer if a pipe ever fails, and ensures a municipal inspector checks concealed drains before new porcelain tile covers the walls. Below is how Town of Newmarket Building Services separates permit-exempt refreshes from permitted alterations, with links to the official municipal and provincial pages.

Bathroom work in Newmarket that does not require a building permit

Under the Ontario Building Code and Town of Newmarket Building Services guidelines, like-for-like fixture and finish replacements in an existing bathroom do not require a municipal building permit as long as the plumbing system and framing are not altered: Source: Town of Newmarket: Building and Permits (When is a Building Permit Required?) (accessed October 10, 2026)

• Swapping a toilet, sink, faucet, shower mixing valve or bathtub in the exact same position without changing the drain, waste or vent pipes.
• Installing a new bathroom vanity cabinet, quartz or stone countertop, mirror or medicine cabinet.
• Stripping old ceramic tile, installing waterproof backer board and membrane, and setting new floor and wall tile.
• Painting, trim carpentry, and replacing an existing exhaust fan or light fixture (electrical wiring is regulated separately by the ESA).

In everyday terms, many 3-piece hall full bathroom renovations in Gorham-College Manor, Huron Heights, Armitage, Glenway and Summerhill Estates proceed without a municipal building permit because the toilet stays on its existing floor flange, the vanity ties into the existing wall trap, and the new tub sits in the original 60-inch alcove.

Bathroom work that requires a Town of Newmarket building permit

Town of Newmarket Building Services requires a building permit whenever a project adds or alters plumbing drains, vents or supply lines, modifies structural framing, or creates a new bathroom: Source: Town of Newmarket: Residential Building Permits and Plumbing Alterations (accessed October 10, 2026)

• Relocating a toilet or tub/shower drain, even by 12 or 18 inches, because the under-floor drain branch and venting configuration must be reworked.
• Combining a corner tub and small stall into one relocated walk-in shower in a Stonehaven-Wyndham or Woodland Hill primary ensuite where the drain moves across the floor.
• Adding a new plumbing fixture, such as adding a freestanding tub beside a shower or re-piping a single drain stack into a two-trap double vanity where new vent branches are cut in.
• Building or altering a basement bathroom—whether trenching concrete for new drains, modifying rough-ins, or finishing a lower-level accessory dwelling unit (two-unit house).
• Structural framing alterations, such as removing or opening a load-bearing wall or cutting floor joists to recess a zero-threshold curbless shower pan.

What about a tub-to-shower conversion?

Whether an alcove tub-to-shower conversion requires a Town of Newmarket permit depends on what changes underneath the floor. Because most bathtubs use a 1.5-inch P-trap located at one end of the alcove and a stand-alone shower code-compliantly uses a 2-inch drain trap (often shifted to the centre of the shower pan or along a wall for a linear drain), altering the trap size and location triggers a plumbing permit. We inspect your existing setup and state clearly in your written quote whether a permit is needed.

Davis Drive, Yonge Street and Glenway condominiums

If you live in a condo building along Davis Drive, Yonge Street or in Glenway, condominium corporation approval comes before any work starts. Property management requires a completed alteration agreement, our written scope of work, our WSIB clearance certificate and our certificate of liability insurance naming the condominium corporation. Because condo drain traps are cast into the concrete slab, fixtures almost always stay in their existing footprints; see our small and condo bathrooms in Newmarket page.

Who submits the permit application and drawings

Applications to Town of Newmarket Building Services are submitted digitally through the Town’s online ePlans portal. Either the property owner or an authorized agent—such as your renovation contractor—can submit the package with a signed Owner’s Authorization form.

Ontario’s consumer protection rules emphasize an important legal fact: as the homeowner, you are ultimately responsible for ensuring required building permits are in place for work on your property. Source: Government of Ontario: Your rights when starting home renovations or repairs (accessed October 10, 2026) Whenever your contractor agrees to handle the permit, make sure that responsibility is written into your contract and ask to see the issued permit number before demolition starts. Read our checklist on how to vet a bathroom contractor in Newmarket for what else your contract should cover.

Drawings, BCIN designers and municipal inspections

A residential bathroom permit submission includes scaled floor plans showing the current room layout, the proposed fixture positions, wall framing changes, and plumbing drain and vent details. Under Ontario rules, permit drawings must be prepared either by the homeowner directly or by a qualified designer registered with a Building Code Identification Number (BCIN), which can be verified on the provincial QuARTS registry. Source: Ontario Ministry of Municipal Affairs and Housing: QuARTS designer registry (accessed October 10, 2026)

Once Town of Newmarket Building Services issues the permit, a municipal building/plumbing inspector visits at the rough-in stage—while the floor and walls are open and the new ABS drains, vents and water lines are visible—before waterproofing board and porcelain tile cover the framing.

Electrical work and the Electrical Safety Authority (ESA)

Municipal building inspectors in Ontario do not inspect electrical wiring. All electrical work in a Newmarket bathroom—adding wet-rated shower pot lights, wiring an electric floor-heating mat, installing a new GFCI outlet by the vanity, or running a circuit for a new exhaust fan—is governed by the Electrical Safety Authority (ESA). Source: Electrical Safety Authority (accessed October 10, 2026) The work must be carried out by a Licensed Electrical Contractor who files an ESA notification and supplies the Certificate of Acceptance for your records.

How permits fit into your Newmarket renovation budget and timeline

Keeping fixtures in their existing footprints means zero municipal permit fees and no review wait before demolition. Moving drains or adding a basement bathroom adds drawing preparation, the Town’s permit fee, the municipal review window prior to start, and the on-site rough plumbing inspection. When a layout change—like removing an unused corner tub deck in a builder-grade ensuite upgrade—makes the bathroom work far better every day, we build the permit steps right into our 5-step renovation process.

Compare full package and line-item costs on our Newmarket bathroom renovation cost guide, or upload photos of your bathroom for a free itemized quote. For direct municipal enquiries, Town of Newmarket Building Services can be reached at 905-895-5193.