Home extensions in Highgate are one of the best ways to add space and value to your property. Whether you’re planning a full rear extension or a stylish loft conversion, our team at Structural Engineer Calcs provides accurate, Building Control–approved structural calculations designed around your home. From removing load-bearing walls to planning complete steel beam layouts, we make sure your project is safe, fully compliant, and ready for approval. We work with homeowners across Highgate and Greater London, helping them build with confidence and peace of mind.
Highgate Village, N6 (Conservation Area)
Split-Level Rear Extension & Loft
Steep Sloping Site & Retaining Walls
Camden / Haringey Conservation Consent
Home extension Highgate projects often face two hurdles: the strict rules of the Highgate Conservation Area and the steep gradients of Highgate Hill. This project required complex retaining walls and stepped foundations to create a modern open-plan space that satisfied Haringey planners.
Highgate has strict Article 4 directions. We design structural solutions that are sensitive to historic masonry, ensuring your Highgate home extension gets approval from Conservation Officers.
Many N6 gardens slope steeply away from the house. We engineer stepped foundations and retaining walls, allowing you to create level, usable living spaces that connect seamlessly to the outdoors.
With Highgate property values being some of the highest in London, a well-engineered extension is a smart investment. We minimise steel column sizes to maximise your usable square footage.
Given the topography, Highgate is prime for lower-ground extensions. We provide the structural calculations and Basement Impact Assessment (BIA) support often required by Camden and Haringey.
Whether you are under Camden or Haringey Council, navigating a home extension Highgate build requires local expertise. Here is our workflow to get your N6 project built.
We review your drawings against Highgate Conservation Area constraints. We check if a Retaining Wall Act notice or BIA is likely required.
For steep Highgate sites, we may recommend a visit to assess ground stability and neighbouring boundary walls before starting calculations.
We produce the full structural pack, including steel beam calculations, retaining wall details, and connection designs for your builder.
We handle queries from Building Control (Camden or Haringey) to ensure your steelwork is signed off without delay.
“We couldn’t be happier with the service from Structural Engineer Calcs. They looked after our home extension and loft conversion Highgate project with complete professionalism. The calculations were clear, accurate, and approved by Building Control without any issues. Everything ran smoothly from start to finish and the whole experience was quick, efficient, and stress free.”
Comprehensive structural packages for smooth construction and Building Control approval across Highgate — ideal for your next home extension Highgate project in Greater London.
Clear and practical layouts designed to make your loft conversion Highgate safe, efficient, and simple to construct — fully ready for Building Control sign off.
Accurate load-bearing wall checks that let you create open, modern living spaces in your Highgate home while keeping full structural safety and compliance.
Precise beam design for large openings and bi-fold doors — ideal for rear extensions with wide glazing and bright family spaces in Highgate properties.
Full Building Control-ready calculations and drawings for fast approval across Highgate and the wider Greater London area.
On-site inspections, crack assessments, and pre-extension advice to help you plan safely and confidently for your next project in Highgate.
Most home extension Highgate projects fall between £250–£550 depending on span lengths, number of beams, and the overall complexity of the design. Each project is quoted individually with a clear, fixed fee and no hidden extras.
Yes. Building Control will request structural calculations to confirm that your design is safe and compliant. We prepare clear calculation packs and drawings for home extension Highgate and loft conversion Highgate projects.
Most small to medium projects are completed quickly once we receive your drawings and brief. If you’re working to a deadline, let us know and we’ll prioritise your project where possible.
Yes. We can work from architect drawings, planning sets, or measured surveys. If you don’t have full plans yet, clear sketches and photos are usually enough for us to quote and advise.
We’ll need your address, drawings or sketches, a short outline of the work (extension, loft, or wall removal), and any key spans or opening widths. Photos of the existing structure are also very helpful.
Yes. All of our calculation packs follow current UK Building Regulations and are presented in a professional, easy-to-review format that Building Control officers recognise and approve.
We cover Highgate and nearby areas across Greater London, including Hampstead, Muswell Hill, Crouch End, and Finchley. If you’re close by, get in touch and we’ll confirm availability.
Yes. We design steel beams for knock-throughs, rear extensions, and large glazed openings. This includes beam sizing, padstones, bearings, posts, and connection details for your builder.
Yes. We design ridge beams, purlins, trimmers, and dormer framing, and we check the loft floor structure for proper load paths. We also assess headroom and stair placement to make sure the loft feels spacious and practical.
Not always. Many domestic projects can be completed using drawings, photos, and a short call. If we feel a site visit in Highgate or nearby would be useful, we’ll suggest it.
We provide a fixed fee once we’ve reviewed your drawings and brief. There are no hidden extras — if anything changes, we’ll confirm before carrying out additional work.
Share the documents with your builder and Building Control. If any questions come up, we’ll reply quickly and provide any clarifications needed to keep your approval process moving.
Click Get Your Free Structural Quote, upload your drawings, and tell us about your project. We’ll review and respond with a fixed fee and clear next steps.
