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Projects/Riverside House Extension

Design Risk Workspace

Riverside House Extension — Stage 3 Spatial Coordination

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Open

1

Under Review

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Significant

under reviewStage 3SIGNIFICANT

Structural intervention at party wall

New steel frame bears onto existing party wall. Risk of differential movement and cracking to neighbour property.

Mitigation

Independent structural survey of party wall. Movement joints at interface. Party wall agreement in place.

Residual Risk

Monitor during construction. Pre-condition survey completed.

Owner: James ChenUpdated: 3 Jun 2026
acceptedStage 3

Flat roof drainage falls insufficient

Existing structure limits achievable falls on new flat roof extension. Risk of ponding.

Mitigation

Tapered insulation to achieve 1:60 minimum falls. Secondary outlet specified.

Owner: Tom DaviesUpdated: 27 May 2026