BuildRules/Newmarket/Shed / accessory structure

Newmarket project guide

Do you need a permit for a shed in Newmarket?

Check Newmarket shed permit rules for the 15 m² threshold, plumbing and zoning setbacks before installation.

2 min readLast verified Oct 2, 2026
The short answerConditional

A detached structure greater than 15 m² requires a building permit. Standalone structures at or below 15 m² without plumbing are typically permit-exempt.

Newmarket separates building-permit size from zoning. Smaller structures still need to meet setbacks, height and lot-coverage rules.

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BUILDRULES / NEWMARKET

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Newmarket / Shed / accessory structure

A detached structure greater than 15 m² requires a building permit. Standalone structures at or below 15 m² without plumbing are typically permit-exempt.

Town of Newmarket · BuildRules reviewed 2026-10-02

Know what matters

Know what applies to your project.

Check the conditions below before you finalize the scope. Every answer connects to an official source.

Detached structure sizePermit required over 15 m²Conditional

Newmarket lists detached structures greater than 15 square metres as requiring a building permit.

Source · Town of Newmarket

Building and Renovating · Permit triggers for decks, sheds, basements, entrances and ARUs

Verified Oct 2, 2026Open official source
Small standalone buildingTypically permit-exempt at 15 m² or less without plumbingConditional

Newmarket lists standalone buildings under 15 m² with no plumbing among activities that typically do not require a permit.

Source · Town of Newmarket

Building and Renovating · Permit triggers for decks, sheds, basements, entrances and ARUs

Verified Oct 2, 2026Open official source
ZoningStill appliesInfo

The Town directs owners to check setbacks, building height and lot coverage even when a shed does not need a permit.

Source · Town of Newmarket

Building and Renovating · Permit triggers for decks, sheds, basements, entrances and ARUs

Verified Oct 2, 2026Open official source

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Preparation checklist · Reviewed 2026-10-02

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Plan ahead

Fees and timing

TimelineConfirm the current municipal review timeline after a complete application is accepted.
FeesConfirm the current Newmarket fee schedule for the exact permit class before filing.

From reading to doing

Your next steps.

  1. Measure floor area
  2. Confirm plumbing and intended use
  3. Check setbacks, height and lot coverage
  4. Apply if the permit threshold is exceeded

Trace the evidence

Official sources behind this guide.

These are the source documents linked in the rules above. Check the municipal authority for current requirements before submitting a project.

  • Town of Newmarket

    Building and Renovating · Permit triggers for decks, sheds, basements, entrances and ARUs

    Source verified Oct 2, 2026

A little more clarity

Common questions.

Do you need a permit for a shed in Newmarket?

A detached structure greater than 15 m² requires a building permit. Standalone structures at or below 15 m² without plumbing are typically permit-exempt.

What should I prepare for shed / detached structure in Newmarket?

Start with Structure dimensions; Site plan or property sketch; Use and plumbing information; Construction drawings if a permit is required. Confirm the final submission requirements with Newmarket for the actual scope.

What should I do before starting this project in Newmarket?

Measure floor area. Confirm plumbing and intended use. Check setbacks, height and lot coverage. Apply if the permit threshold is exceeded.

Know the zoning terms

The shed may be permit-exempt. The property rules still matter.

Placement, setbacks and lot coverage may still apply even where a shed is exempt from a building permit.

Setback

A setback is the required distance between a building or structure and a property line, street, another feature or another regulated reference point.

Lot coverage

Lot coverage is a zoning measurement describing how much of a lot is occupied by buildings or structures under the applicable municipal rules.

Zoning by-law

A municipal rule set that controls how land and buildings may be used and developed, including matters such as permitted uses, setbacks, height, lot coverage and other site-specific standards.

Same project, different city

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01 Permit and local-rule guidance02 Documents to prepare03 Questions still to verify
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A provider match is not guaranteed. Municipal approval stays with the City.

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