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Legal Basement Contractor in Markham
OBC Engineering Integrity and Municipal Registration Systems
Planning to convert your Markham lower level into an authorized secondary unit?
KCDL implements strict structural adaptation and secondary apartment development across Markham’s high-density suburban communities, historic town centers, and mature residential enclaves. We systematically eliminate municipal processing gridlocks by coordinating precise architectural drafting, structural load calculations, and comprehensive city zoning verifications. Whether you are expanding a property in Unionville, legalizing an investment layout within Cornell, or constructing a self-contained suite near Milliken Mills, our owner-led execution guarantees absolute alignment with municipal requirements, rapid permit approvals, and flawless interior architecture.
Turnkey structural modification and basement legalization systems engineered for Markham landlords and multi-generational families.
Fully Compliant. Precision Execution.
RESIDENTIAL
Legal Suite Conversions
Second Unit Legalization
Basement Apartment Retrofits
Personal Use Conversions
Separate Walkout Construction
Egress Window Installation
Fire Separation Upgrades
Frequently Asked Questions
What are the parking bylaws for second units in Markham?
Markham does not require any additional parking spaces for a second unit or garden suite. However, you are required to provide two dedicated bicycle parking spaces on the property. The original primary vehicle spaces must remain intact.
How is emergency exit compliance handled in Markham basement suites?
If the suite lacks a direct grade-level walkout door, we excavate and install a code-compliant egress window system. The window must provide an unobstructed opening of at least 0.35 square meters with a minimum dimension of 380 mm, accompanied by a structural window well that allows clear movement to the outside.
What are the ceiling clearance thresholds for a legal suite in Markham?
For existing dwellings, the Ontario Building Code requires legal basement apartments to have 1.95 metres (6 feet, 5 inches) of clear headroom across a minimum of 75% of the habitable floor area. Where the existing foundation slab does not provide sufficient clearance, we can increase usable height through underpinning or bench footing solutions.
