For rear, side-return, and wraparound extensions across the borough.
Structural Design for Barnet House Extensions
We provide specialist structural engineering for house extensions throughout the London Borough of Barnet. Whether you are planning a single-storey rear extension on a 1930s semi in Finchley or a double-storey side extension on a detached home in Mill Hill, our chartered engineers deliver practical and efficient designs. We produce all the necessary structural calculations and drawings for Building Regulations approval, ensuring your project is built safely and to the highest standard.
Local Challenges
House Extensions in Barnet
Barnet's diverse ground conditions, from London Clay to areas with a high density of mature trees, present specific challenges for foundation design. We carefully assess site-specific factors and the proximity of neighbouring properties to design appropriate foundations, whether traditional trench fill or piled solutions. For properties in conservation areas like Hampstead Garden Suburb, we design discreet structural solutions that respect the strict aesthetic controls, ensuring new steelwork and structural openings are sensitively integrated with the original building fabric.
What You Get
- Detailed foundation design and drawings
- Steel beam (RSJ) and column calculations
- Floor and roof joist design and specification
- Structural drawings for Building Control submission
- Construction details for key structural junctions
- Calculations for lintels over new openings
Tailored Pricing
Request a Fee Proposal
Every project is unique. Share your drawings with us and receive a detailed fee proposal tailored to your house extensions project in Barnet.
Recent Project
Finchley, Barnet
We designed the full structural package for a 6-metre rear extension to a 1930s semi-detached house, creating a large open-plan kitchen-diner. The design included complex steelwork to support the entire rear elevation and carefully designed foundations to account for a large protected oak tree in the garden.
Common Questions
House Extensions in Barnet — FAQ
Ready to Engineer Your Project?
Get a bespoke consultation with a structural engineer who specialises in house extensions in Barnet.