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Combining or dividing leased units: define the demolition around the new tenancy

A tenancy change can turn two smaller units into one premises or divide a larger space for separate occupiers. The visible wall is only part of either project. The new layout also changes how retained rooms, entrances and building systems relate to the area being removed.

Siteforce provides commercial strip-outs in Markham and across the GTA. We assess the demolition contribution to the agreed layout. New construction, system alterations and the design of the tenancy boundary remain defined parts of the wider fit-out project.

Start with both layouts on the same basis

Use a current plan and a proposed plan that show the complete affected units. Identify the entrances, retained rooms, washrooms and circulation routes. Mark which tenant or landlord instructions are confirmed and which design questions remain open.

For a combined unit, the main question is how the proposed connection fits the retained building. For a divided unit, the question is what needs to be cleared or altered so the new separation and each occupier’s fit-out can be built. Neither situation is fully described by saying “remove the middle wall”.

Compare the actual removal packages

Project directionDemolition to defineWider project decision
Join two unitsAgreed connecting opening and affected finishes or fit-outDesigner and property team establish the connection, structure and retained systems
Divide one unitSelected fit-out removed along the proposed separation and affected areasDesign team establishes the new boundary and each unit’s requirements
Change only part of a boundaryLocal removals and finish edgesConfirm what remains on both sides and how new work meets it

A partition’s role cannot be established from its position on a leasing plan. Structural and fire-separation questions require the appropriate professional review. Where an assessed structural-removal package is involved, discuss it through Siteforce’s structural-demolition service.

Trace what crosses the new line

Ceilings, flooring, services and attached fittings may continue across the proposed boundary. The responsible designer and trades identify which continue, which change and which need preparation before demolition. A room retained for one occupier may depend on connections outside its visible walls.

Landlord authority and project approvals also need to match the actual property and alteration. The responsible project parties confirm the municipal path and building requirements. A demolition assessment does not establish a universal permit or occupancy answer for all GTA premises.

Illustrative comparison: one landlord, two different outcomes

These are illustrative planning examples, not completed Siteforce projects.

In the first, a tenant expands into the neighbouring unit. The proposal retains most existing rooms and creates an agreed connection between the spaces. The removal package follows the reviewed opening and its affected finishes; the rest of the two-unit renovation is separately defined.

In the second, a landlord plans two smaller units from one larger premises. Selected counters, partitions and ceiling areas obstruct the proposed new layout. The removal package clears those defined areas for the contractors building the new separation and fit-outs. It does not treat construction of the new units as part of strip-out by default.

The useful difference is each project’s physical endpoint. That endpoint should be clear before contractors are asked to price and programme their contributions.

Discuss the proposed tenancy layout

Request a Siteforce assessment with the property location, current and proposed layouts, and authorised landlord contact. Identify the elements that stay and the boundary questions the design team is resolving. This gives the demolition assessment a specific project to work from.

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