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.

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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?

Under the Ontario Building Code guidelines for existing dwellings, a legal basement apartment must maintain a continuous clear headroom of 1.95 meters (6 feet, 5 inches) across at least 75% of the habitable floor area. If your current foundation floor slab leaves you short of this threshold, we implement professional underpinning or bench footing systems.

Ready to maximize the yield of your Markham property? Request a free estimate today.

Building the FUTURE with KCDL