Both cities exempt some small exterior jobs in Old Thornhill, mainly caulking, weatherstripping and repairs to what is already there. New fences, new doors and windows, and paint are where the two lists split, so check your side before you start.
Old Thornhill around Yonge Street is covered by two heritage conservation districts, one run by the City of Vaughan and one by the City of Markham, each with its own plan. The line between them follows the municipal border, so two neighbours can face different answers for the same job. This guide sets the two exempt lists side by side for the small exterior work homeowners most often ask about. Cost is not the issue here; the paperwork is.
What "exempt" means, and what it doesn't
An exemption means the city does not review the work as a heritage permit. It does not waive the building permit rules, the Electrical Safety Authority's rules for wiring, or anything in your own deed. And it does not always mean you can skip the city entirely: Vaughan's 2007 plan says minor work exempt from a heritage permit may still call for a Heritage Permit Clearance Letter from Cultural Services, so staff can confirm the work really falls in an exempt class.
Vaughan's side: the exempt list
Section 3.1.2 of Vaughan's Thornhill plan, "Activities Exempt from Review", is the list to read. As we read the published text, it covers interior work, storm doors and windows, minor installations such as lighting, and fencing or small outbuildings that are not readily visible from the street. It also names ramps and railings that improve accessibility, and gates installed for child safety. Our earlier guide on caulking and touch-up painting covers caulking, window repair and weatherstripping, which the same section lists.
One qualifier matters: "not readily visible from the street" is attached to fences and outbuildings. A front fence along the sidewalk is a different conversation from a rear fence behind the garage. Vaughan is also updating the Thornhill plan, so the list can change. Email CulturalHeritage@vaughan.ca with your address and a photo of the job before you book anyone.
Markham's side: the exempt list
Markham's heritage permit page lists the works that need no heritage permit. For small exterior jobs, those are general repairs to weather-stripping, fences and existing cladding, repair of broken window panes to original specifications, and backyard patios, garden sheds, gazebos and other small outbuildings not readily visible from the street, provided they need no building permit. Planting and removing vegetation on private property is also on the list, though tree removal needs a separate permit.
Everything that changes the look of the house goes to a Minor Heritage Permit instead. The city's examples include painting, masonry cleaning and repointing, removing and replacing windows or doors, changes to verandas, trim, soffits and fascia, new or different fences, and front-yard patios, walkways and lamp installations. Markham states there is no fee for a Minor Heritage Permit application. The wording that matters is "repairs": fixing what exists is exempt, and changing it is not.
Side by side
- Caulking and weatherstripping: exempt in Vaughan's plan (clearance letter still asked for); weatherstripping repair exempt in Markham.
- Fence repair: exempt in Markham for an existing fence; exempt in Vaughan if the fence is not readily visible from the street.
- New or different fence: a Minor Heritage Permit in Markham; in Vaughan, ask, because the plan exempts only fences out of sight of the street.
- Broken window pane: exempt in Markham if repaired to the original specification; window repair and storm windows exempt in Vaughan.
- Painting: a Minor Heritage Permit example in Markham; not on Vaughan's exempt list we found, so ask in writing.
- Replacing a window or door: a Minor Heritage Permit in Markham; ask Vaughan before ordering.
- Porch light or lamp post: minor lighting exempt in Vaughan; Markham lists front-yard lamp installations under the Minor Heritage Permit. New wiring is regulated electrical work either way.
Which district is your house in?
Only part of Thornhill is inside a district, so do not assume from the street name. Markham publishes a Thornhill district map and an online search of its heritage register, and the City says every property in a district needs approval for exterior alterations through a Minor or Major Heritage Permit. For the Vaughan side, the City's Thornhill plan page carries a district area map, and Cultural Heritage staff can confirm an address. If your house is in neither district, these rules fall away and the ordinary permit picture applies, which our guide to how your side of Yonge Street changes the rules for small jobs covers.
A sensible order for any small exterior job
- Confirm which city and district your address is in.
- Decide whether the job repairs what is there or changes it.
- Email the heritage staff with a photo and one line of description, and keep the reply.
- Ask whether you need a clearance letter or a Minor Heritage Permit.
- Only then book the work, and give the craftsman the written answer.
Quick answers
Do I need a permit to repair a fence in Old Thornhill's heritage districts?
Not for a repair to an existing fence on the Markham side, where general fence repairs are exempt. A new or different fence needs a Minor Heritage Permit. Vaughan's plan exempts fences not readily visible from the street.
Are caulking and weatherstripping exempt in Thornhill's heritage districts?
Yes on both sides, as far as the published lists show. Vaughan's plan exempts caulking and weatherstripping, and Markham's permit page exempts general weatherstripping repairs. Vaughan still asks for a clearance letter.
Is painting exempt in Thornhill's heritage districts?
Not on Markham's published list. Markham's permit page names painting as an example of work needing a Minor Heritage Permit, which has no fee. Vaughan's list does not mention paint, so ask first.
What is a heritage clearance letter in Vaughan?
It's written confirmation from Vaughan's Cultural Heritage staff that your planned work falls in an exempt class. The 2007 plan says exempt minor work may need one, so ask before booking the job.
How do I find out which heritage district my Thornhill house is in?
Markham publishes a Thornhill district map and an online heritage register search. For Vaughan, check the district map on the City's Thornhill plan page, or email Cultural Heritage staff with your address.
Ask first, then fix
Most of these jobs are small, and the exemptions are generous for repairs. The expensive mistake is a change made before anyone asked, then undone at the owner's cost. A two-line email to the right city first usually settles it. When you are ready for the work itself, Rhodex can match you with a vetted craftsman, backed by $5M liability insurance; request a fixed price and mention the heritage question so it is built into the quote.
Related reading
- Rhodex in Thornhill: guides for homeowners
- Fence repair services
- Picket Fence or Gate Repair in a Thornhill Heritage District: What Needs a Permit?
- Touch-Up Painting and Caulking in a Thornhill Heritage District: What Needs a Permit?
- Which Side of Yonge Street You're On Changes Your Permit Process
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