Home extension Bolton projects are a great way to add space and value to your home. Whether you’re planning a full rear extension or a loft conversion Bolton, our team at Structural Engineer Calcs provides precise, Building Control-approved structural calculations tailored to your property. From removing load-bearing walls to designing complete steel beam layouts, we make sure your project is safe, compliant, and ready for approval — helping homeowners across Bolton, Sale, and Greater Manchester build with confidence.
Bolton, Greater Manchester
Home Extension and Loft Conversion
Full Detailed Structural Calculations
Building Control Approved
A carefully planned upgrade combining a rear home extension and a loft conversion in Bolton. More usable space, better daylight and a structure designed for smooth Building Control approval.
Every property in Bolton is different. We design the structure around your exact house layout, so your home extension Bolton project or loft conversion Bolton works safely, efficiently and looks like it was always meant to be there.
Thoughtful structural planning for wide steel spans, roof lights and full-height glazing brings in more daylight and improves flow through the house. You get open, modern, energy-aware living that connects better to the garden.
Need more space but don’t want to leave Bolton? A well-planned rear extension or a converted loft can give you a bigger kitchen diner, a proper home office or an extra bedroom — all without the cost and hassle of moving.
A strong, Building Control-ready design can lift both day-to-day comfort and long-term value. A high quality home extension or loft conversion makes your property more attractive in the Bolton market.
Planning a home extension Bolton project or a loft conversion Bolton? Here’s how we take your project from first enquiry through to full Building Control approval.
Send us your architectural drawings, sketches or even photos. We’ll review them quickly and provide initial guidance for your Bolton project.
Within 24 hours, we’ll confirm a fixed fee, clear scope of work and any additional information needed to move forward.
We produce all the required calculations, RSJ designs and drawings tailored to your home extension or loft conversion Bolton project — ready for Building Control submission.
We handle Building Control comments, provide reasonable revisions, and support your builder through to final sign-off, ensuring a smooth process from start to finish.
“We’re absolutely delighted with the service from Structural Engineer Calcs. They handled everything for our home extension & loft conversion Bolton project with total professionalism. The calculations were accurate, the drawings clear, and Building Control approved them on the first submission. The whole process was smooth from start to finish — a genuinely five-star experience.”
Comprehensive structural packages for smooth construction and Building Control approval across Bolton — perfect for your next home extension Bolton project.
Clear beam and joist layouts designed to make your loft conversion Bolton safe, efficient and easy to build, ready for Building Control sign off.
RSJ sizing and bearing checks that help you create brighter, open-plan spaces in your Bolton home while maintaining full structural integrity.
Accurate steel beam design for large openings, perfect for extensions with wide glazing and bi-fold doors that bring in more natural light.
Complete Building Control-ready calculations and drawings for fast approval across Bolton and the wider Greater Manchester area.
On-site inspections, crack assessments and pre-extension advice to help you plan safely and confidently for your next project in Bolton.
Most home extension Bolton projects fall between £250–£550 depending on beam spans and complexity. Every job is quoted individually with a fixed, transparent fee.
Yes. Building Control will ask for structural calculations to prove the design is safe and compliant. We prepare calculation packs and drawings for home extension Bolton and loft conversion Bolton projects.
Most small to medium projects are turned around quickly once we have your drawings and brief. If you’ve got a deadline, tell us and we’ll prioritise where possible.
Yes. We can work from planning drawings or measured survey drawings. If you don’t have full plans yet, clear sketches and photos are fine for a quote and early advice.
Your address, any drawings or sketches, a short description of what you want (extension, loft, knock-through), your preferred spans or opening widths, and any known site constraints. Photos of the existing structure help a lot.
Yes. Our packages follow UK Building Regulations and are issued in a clear format that Building Control can review and approve.
We cover Bolton, Farnworth, Horwich, Westhoughton, Walkden, Worsley, Bury and the wider Greater Manchester area. If you’re just outside that, ask and we’ll confirm availability.
Yes. We design steels for knock throughs, rear extensions and large glazed openings. That includes beam sizing, bearings, padstones, posts and connection details for your builder.
We size ridge beams, purlins, trimmers and dormer framing, and we check the floor build-up. We also review stair opening trims and practical headroom so the loft is actually usable, not just technically converted.
Not always. Many domestic projects are completed from drawings, photos and a short call. If a visit in Bolton or nearby will add value, we’ll recommend it.
We provide a fixed fee once we’ve seen your drawings and scope. No hidden extras. If the brief changes, we’ll confirm any update before doing extra work.
Share them with your builder and Building Control. If any queries come back, we respond quickly and provide reasonable clarifications so approval runs smoothly.
Click Get Your Free Structural Quote, upload your drawings and tell us what you’re trying to achieve. We’ll review and reply with a fixed fee and a clear next step.
