Markham: questions buyers ask about the records
Each page names the public record that answers one question, where to read it yourself, and which OfferDue check reads it. What the records show, never advice.
Sources checked October 29, 2026
Markham at a glance
The town's local rules as pictures, from our hand-kept tables of its by-laws and pages and from its flood page. Each tile opens the page with the full wording, its source and the date we checked it.
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Property tax
0.72% of assessed value, 2026 residential rate
Read the question →0%2.32% (Chatham-Kent)The lowest of 61 towns. Highest: Chatham-Kent, 2.32%.
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Extra units
Up to 3 homes on a lot
Read the question → -
Trees
20 cm across: the trunk size the rule names
Read the question → -
Conservation authorities in 2027
Read the question →Toronto and Region authorityjoinsCentral Lake Ontario Regional Conservation Authority
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A business run from home
- Up to 25%of the floor area
- 1 from outsidemay work there
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Water and sewer bills
- A bill every two months
- A stormwater charge of its own
Is a Markham address in the Greenbelt or the Oak Ridges Moraine?
The Province's Greenbelt boundary and land-use maps and the Oak Ridges Moraine Conservation Plan's land use designation and boundary maps, each with an interactive map.
In the free check and the full report.
How can I find recorded pits, quarries and petroleum wells near a Markham home?
Two provincial records: the Find Pits and Quarries map of licensed and permitted aggregate sites, and the petroleum wells dataset of wells drilled for oil, gas, salt or underground storage.
In the free check and the full report.
How can I find mapped railways, power lines and pipelines near a Markham home?
The Ontario Railway Network and the Ontario Utility Line dataset: provincial mapping of tracks and crossings, and of power lines, pipelines and other utility lines.
In the free check and the full report.
What records explain additional residential units at a Markham home?
Section 4.9.9 of the City's comprehensive Zoning By-law 2024-19, as amended by By-law 2026-44, in the office consolidation to 20 July 2026, and the City's Secondary Suites guide for homeowners (April 2026).
In the free check and the full report.
What does Markham's tree by-law cover on a private lot?
The City's Tree Preservation By-law 2023-164, passed on 13 December 2023, as summarised on its tree permit application page.
In the free check and the full report.
What is Markham's residential property tax rate for 2026?
The City's 2026 tax rates table by property class, on its About Your Tax Bill page, and its 2026 final tax bill brochure.
In the free check and the full report.
Is a Markham address in a regulated flood area, and whose map says so?
The Toronto and Region Conservation Authority's Regulated Area Search and permit pages, under Ontario Regulation 41/24.
Public source; flood plain and regulated-area checks not included in OfferDue reports.
Who helps with a home in Markham
Every kind of business a home needs, by moment, and the local rules their work runs into, each with its source and the date it was checked.
Public-record information, not legal, financial, insurance or inspection advice. Records change and can be incomplete, and these pages describe the records, not any particular home. What we cover, city by city.