Trusted UK Specialists in Home Extensions

Transform Your Home with a Stunning Extension

Add space, value, and style to your property with expert design, structural calculations, and build-ready solutions tailored for UK homes.

Trusted UK Home Extension Experts

From concept to completion, we design and calculate safe, stylish, and practical extensions that add real value to your home.

Whether you need extra space for a growing family, a brighter open-plan kitchen, or a modern rear extension, we provide expert design and structural calculations tailored to UK building standards. Our team ensures your project is compliant, build-ready, and adds lasting value to your property.

Speak with our experts today – Free advice & estimates available.

+44 7955536122

Request a Free Quote

Tell us about the space, spans/openings, and any planning or drawings you already have.

01.

Single-Storey Extensions

Expand your living space with modern, practical ground-floor extensions tailored to your home.

قم بتوسيع مساحة المعيشة الخاصة بك مع امتدادات الطابق الأرضي الحديثة والعملية المصممة خصيصًا لمنزلك.
 

02.

Double Storey Extensions

Maximise value and space by adding bedrooms, bathrooms, or home offices above your existing layout.

03.

Open-Plan Kitchens

Create light-filled, family-friendly spaces with seamless kitchen and dining extensions.

04.

Loft & Garage Conversions

Turn unused lofts or garages into stylish, functional rooms that add real value.

Why Choose Us

Trusted by UK homeowners for quality, safety, and lasting value.

Qualified Structural Experts

All our designs and calculations meet UK Building Regulations for peace of mind.

Flexible Scheduling

We work around your family life to minimise disruption during the project

Workmanship You Can Trust

Precision planning & reliable contractors deliver extensions built to last.

Transparent Pricing

Simple quotes with no hidden costs, ever.

Specialist Home Extension

Focused only on extensions. Expert advice, clear solutions. Tailored to your home.

Free Advice & Estimates

Speak with us today for expert guidance before you commit.

Structural Calculations & Drawings

Safe, Approved, Build-Ready Designs for Your Home

We prepare Building Control ready structural calculations and drawings for home extensions, loft conversions, wall removals and steel beams. Clearly detailed for your builder, and designed to pass first time.

Home Extensions

Calcs and drawings for single or double storey extensions. Beams, lintels, foundations and connections sized to UK standards.

Loft Conversions

Design of new floor joists, ridge beams and dormer supports to create bright, usable loft space that meets regulations.

Load-Bearing Wall Removal

RSJ design for open-plan layouts, including padstones, bearings and deflection checks. Explained in plain English.

Steel Beam Design

Eurocode based beam sizing for small openings to long spans, complete with connection details your builder can follow.

Structural Calculations and Drawings for Homeowners

When you are planning a home extension, loft conversion, or knocking through a wall, one of the most important steps is getting your structural calculations and drawings in place. Building Control in the UK requires these before work can start, and they make sure your project is not only safe but also approved without delays. That is where we come in.

We provide homeowners with expert structural calculations and detailed drawings tailored to their property. Whether you want a kitchen extension, an open-plan living area, or an extra bedroom in the loft, we will make sure your structure is designed properly from the start. Our role is to take away the guesswork for your builder and give Building Control everything they need to sign off your project.

Home Extensions

Extensions are one of the most popular ways to add value and space to a home. We calculate the steel beams, lintels, and supports needed to carry the new loads, ensuring your extension blends seamlessly with your existing structure. From single storey rear extensions to double storey side extensions, we provide clear drawings and calcs so your builder knows exactly what to do.

Loft Conversions

Loft conversions need careful design because they add weight to the existing structure. We specialise in designing the new floor joists, ridge beams, and dormer supports required to make your loft safe and usable. Whether it is a simple Velux conversion or a full dormer extension, we prepare the calculations that keep your project compliant with UK standards.

Load-Bearing Wall Removal

Opening up living spaces by removing walls is a common request. But it is vital to know which walls are load bearing and how to support them correctly. We provide the calculations for RSJs (rolled steel joists) and any padstones or connections required. This makes sure your open-plan space is both safe and approved first time.

Steel Beam Designs

Every project involving structural change often comes down to the right beam design. We use the latest software and engineering standards (Eurocodes and BS) to size steel beams, check deflections, and prepare drawings that contractors can follow on site. Our beam designs cover everything from small openings to large spans for major extensions.

Why Choose Us

Fast turnaround - calculations and drawings ready in days, not weeks.
Approved first time - we prepare everything Building Control expects.
Clear communication - we explain the process in plain English.
Experienced team - trusted across the UK for safe, reliable designs.

In short: we handle the technical side of your project so you do not have to. With our calculations and drawings, your builder can get on with the work, and you can enjoy peace of mind knowing everything is designed safely, approved quickly, and built to last.

Ready to start your extension, loft conversion or open-plan project? We prepare the structural calcs and drawings and handle Building Control queries.

Successful Extensions
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Home Extension - semi detached
Here’s What Our Client Say about Us

"Home Extension made the whole process stress-free. From structural calculations to drawings, everything was clear, fast, and approved first time. We’re thrilled with our new space."

Sarah M., Manchester

Homeowner

We couldn’t be happier with our extension. Everything was explained clearly, and the calculations were spot on. The whole build sailed through approval with no issues.
Home Extension - double storey extension
James & Rachel, Stockport
Professional from start to finish. The team gave us peace of mind with accurate drawings and guidance, and now we’ve got the extra space we needed without the stress.
loft conversion
Helen W., Leeds
Clear advice, quick turnaround, and no hidden costs. Our kitchen extension looks amazing and added real value to the house. Highly recommend.
open plan kitchens
David R., Manchester

Ready to Start Your Project?

Tell us a little about your extension, loft, or structural work. We’ll send a free, no obligation quote within 24 hours.

Tell us about the space, spans/openings, and any planning or drawings you already have.

Frequently Asked Questions

Do I need structural calculations for a home extension?

Yes. If your extension changes the way loads are carried (e.g., new openings, new floors/roof, or foundations), Building Control will require structural calculations. We prepare Building-Control-ready calcs and drawings so your builder can build safely and your project is approved quickly.

How much do structural calculations cost?

Costs depend on scope and complexity. A simple steel beam design is typically lower cost than a full extension package with foundations, beams, and roof design. Send your drawings or a brief description and we’ll provide a free, no-obligation estimate within 24 hours.

How fast can you deliver the calculations?

Most beam designs are turned around in a few working days. Full extension or loft packs are usually delivered within 5–10 working days depending on complexity and information provided. If you have an urgent deadline, let us know and we’ll advise on expedited options.

What information do you need from me?

Any existing drawings, sketches, measurements, planning or architect plans, and photos are helpful. If you don’t have drawings, we can advise what’s needed. Tell us the spans, openings, number of storeys, and any known constraints (e.g., drains, chimney breast, party wall).

Can you design steel beams for removing a load-bearing wall?

Absolutely. We design RSJs/steel beams with padstones, bearings and deflection checks to Eurocodes/BS. We also include connection details so your builder can install correctly and Building Control can sign off first time.

Do I need planning permission for my extension or loft?

Some works fall under Permitted Development; others need planning approval. Structural calculations are separate from planning permission and are required by Building Control. If you’re unsure about planning, we can point you in the right direction.

Will you deal with Building Control queries?

Yes. Our packs are designed to pass first time. If Building Control has any technical questions, we’ll respond directly and provide clarifications at no extra cost for the agreed scope.

Do you cover the whole UK?

Yes, we provide structural calculations and drawings UK-wide. Everything is delivered electronically and accepted by local authorities nationwide.

What’s included in a typical extension or loft pack?

Calcs and drawings for beams/lintels, floor joists, roof members (e.g., ridge beam, dormer supports), bearing checks, connection notes, and foundation design where required—clearly presented for your builder and Building Control.

How do I get started?

Send us your drawings or a short description via the form above or email info@homeextension.uk. Or call +44 7424 121936. We’ll review and send a free quote with turnaround time and next steps.

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