Rear Extension Structural Design Manchester

Make space at the back of your home

A rear extension needs a structural approach that fits both the new space and the existing house. We support Manchester homeowners and their designers with calculations and drawings for extensions, from straightforward additions to layouts with larger openings.

Connect new and existing structure

Key questions include the opening into the house, roof support, the proposed wall arrangement and foundation requirements. Large glazed openings can require a different structural approach from conventional masonry layouts, so early coordination helps.

Check what affects the foundations

Ground conditions, nearby trees, drains and neighbouring structures can affect the foundation design. The information needed will depend on the site. We identify relevant design inputs and any further investigations required rather than assuming one foundation solution suits every property.

Agree the package before construction

Share your existing and proposed plans, any planning drawings and the project postcode. We will confirm what calculations and structural details are included and whether site information is sufficient. Changes to the footprint or opening sizes should be reviewed before they are built.

Extensions on constrained urban sites

Rear yards, narrow side passages and nearby buildings are part of many Greater Manchester extension briefs. For a terrace in Didsbury or a semi in Sale or Altrincham, share the available access, boundary information and existing drainage plans with your proposed layout.

A Manchester project? Let’s discuss it.

We welcome enquiries from Manchester, Salford, Trafford, Stockport and surrounding Greater Manchester areas. Design scope, site attendance and timescales are confirmed for your project.