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We know Cheltenham's housing stock and what Cheltenham Borough Council expects
Engineer-reviewed calcs for home improvements in Cheltenham.
Based in Manchester, with engineers around the country for site visits. We've worked extensively across Gloucestershire and know Cheltenham well — the Georgian → modern Regency terraces, Victorian villas, modern estates, the party wall situations that come with them.
More importantly, we know how Cheltenham Borough Council’s building control team operates and we write our calculations to match. That saves time on site and avoids queries coming back.
Local knowledge
PorthouseDean provides structural engineering for extensions, knock-throughs, loft conversions, and two-storey extensions in Cheltenham. With 90 calculations completed across Gloucestershire, our engineers understand the area's Georgian → modern Regency terraces, Victorian villas, modern estates properties, ensuring every design accounts for local building characteristics and Lias Clay, alluvial deposits ground conditions. Our most recent project in the area was a other completed in Jan 2026.
Structural engineering is the core of it. It isn’t where we stop.
The calculations and drawings are ours. So are the things around them that usually land on you: a date you can plan around, one place where everyone sees the same documents, and the change of mind nobody priced for. More than 9,000 projects since 2012 have run through the same process, from a single wall removal to a whole new build.
Three things you always know
Every job runs through the same process, so every customer gets the same three answers.
The price, before you commit
Tell us about the project and we’ll tell you the price and the steps that follow. No hourly rate. If the job changes, there is a free change request on every job.
The turnaround, chosen by you
Pick how fast you need it, and pay less if you can wait. You get a date to work back from.
Every step, in one place
Never wonder where it’s up to — just look. Your project hub shows what is happening now, what is next and anything we need from you, with your drawings, documents and invoice alongside. Share it directly with everyone involved in your project.
One document for building control, one for your builder
Building control gets the calculations. Your builder gets the contractor pack. If either of them has a question about the structure, it comes to us, not to you. How we check and what the process looks like.
Fixed fee. No surprises after you've committed.
No extras for building control queries.
Recent Projects Near Cheltenham
Single storey extension
Single storey extension
Other
Two-storey extension
Single storey extension
Send us your plans
A fixed price before you commit. No obligation, no chasing.
What people say
Frequently Asked
It depends on the size and complexity of your project, so we don't publish a price range for Cheltenham. Tell us about your project and you get a clear, fixed-fee quote before you commit.
Sure, we have worked on a wide variety of Cheltenham's Georgian - modern properties. Our engineers aim to understand the specific requirements of your property from Regency terraces, Victorian villas, modern estates construction, ensuring calculations that respect the original structure while meeting modern standards.
Cheltenham typically has Lias Clay, alluvial deposits. Lias Clay & Cotswold escarpment edge. We factor these conditions into our foundation designs, which may affect the depth and type of foundations required.
On a full plans application, Cheltenham Borough Council has five weeks to decide, or longer if you both agree it in writing (regulation 14A of the Building Regulations 2010). On a building notice there is no plans decision: building control checks the work, and our calculations, as it goes. If they raise a question about the structure, your engineer answers it.
We provide structural calculations throughout Cheltenham and the surrounding Gloucestershire area. Our engineers regularly work on projects across the region, and you choose the delivery date that suits you.
If you're removing a wall, converting a loft, building an extension, or doing anything that affects the structure of your house — yes. Building control will require structural calculations before they sign off the work.
A virtual site visit is included in every quote — it's a chance to put a face to the name and talk through specific design requirements with your engineer. But we don't believe a physical visit is necessary for most residential projects. Working remotely allows us to be more economical while maintaining the same quality throughout. If your project does need a physical visit, we have engineers around the country who can arrange one.
On the date you choose when you book. The price follows the date: pick a later one and it costs less, or an earlier one if you need them sooner.
Every quote includes one free amendment because we know projects change — that's normal. Beyond that, we'll quote any further changes clearly so there are no surprises.
The quote's not the product — the project is. The moments that cost you come later: when building control query something, or your builder can't follow the drawings. That's why BC queries, an amendment and a virtual site visit are included — it's where projects actually succeed or fail.
Local Area Information
Understanding Cheltenham's unique characteristics helps us deliver precise structural solutions.
Structural engineering services in Cheltenham
Expert Structural Engineers Serving Gloucestershire
With extensive experience across Gloucestershire, our structural engineers combine technical excellence with detailed understanding of local building stock. From Georgian → modern properties featuring Regency terraces, Victorian villas, modern estates, we’ve worked on hundreds of projects throughout the area. Our calculations are specifically designed to meet Cheltenham Borough Council requirements, ensuring smooth approval processes.
Calculations That Account for Gloucestershire’s Geology
Ground conditions vary significantly across regions. Gloucestershire presents its own considerations with Lias Clay, alluvial deposits. Lias Clay & Cotswold escarpment edge Our engineers have extensive experience designing foundations for these local conditions, essential for any extension, conversion, or alteration project.
Serving All Gloucestershire Property Types
We regularly work with Regency terraces; Victorian villas; suburban estates throughout Gloucestershire. Whether you’re renovating near Cheltenham Racecourse; Pittville Pump Room; The Promenade; Cleeve Hill or extending a property with convenient access to Cheltenham Spa railway; M5; A40, we bring relevant local experience.
Cheltenham Borough Council building control knows our work and trusts our calculations. This established reputation translates to smoother approval processes and fewer obstacles for your project.
Coverage Across Gloucestershire
Operating throughout Gloucestershire and surrounding areas (population: 119.4k), our services include:
• Loft conversion and roof extension calculations
• Extension designs – all configurations
• Internal structural alterations
• Steel beam and RSJ specifications
• Foundation and underpinning calculations
Gloucestershire Structural Engineering – Request Your Quote
Begin your project with confidence. Contact PorthouseDean for structural calculation services in Gloucestershire. Our fixed-fee quotations arrive within one working day.
Ready to get started?
Send us your plans and you'll have a clear, fixed price before you commit. Or give us a call.
