South East & East England - 0208 183 4321
South West, Wales & Midlands - 01452 346 156
North England & Scotland - 0161 820 3230
Structural Engineers in Devon
Residential structural engineering that doesn't leave you guessing
Comprehensive structural services for homes across Devon. Request your structural calculations quote – fast, reliable, trusted.
We know Devon's housing stock and what Devon County Council (plus District & Unitary Authorities) expects
Offices in Manchester, London and Gloucester, with engineers around the country for site visits. We've worked extensively across Devon — the Pre-Roman → Modern Cob and thatch cottages, granite farmhouses, seaside villas, modern housing, the party wall situations that come with them.
More importantly, we know how Devon County Council (plus District & Unitary Authorities)’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 Devon. With 9,000+ calculations completed across England, we bring proven expertise to every project.
Houses are all we do. That specialism matters when something goes awkward.
We don't do commercial. We don't do bridges. We do extensions, loft conversions, knockthroughs, new builds — and we've done over 9,000+ of them with a 100% building control success record.
That specialism means when your project throws up something unexpected — and they always do — we've seen it before. We know what works, what building control will push back on, and what your builder actually needs on the page to build from.
The quote's the easy part. It's three weeks later that matters.
The difference between structural engineers doesn't show up in a quote. It shows up when your builder's on site and something doesn't add up. When building control come back with a query. When the design changes halfway through and someone needs new calcs yesterday.
Our calculations are detailed enough that your builder can work from them without ringing anyone. When BC come back with a query, we deal with it — as many as they want. If they want something changed, we change it.
Project changes? Every quote includes a free amendment because we know designs evolve. Need to speak to your engineer? We give you a direct booking link for meetings, and our tech support team handles urgent queries whenever you need them.
A builder standing around waiting for a structural answer costs real money. We're the engineers who pick up the phone.
Fixed fee. No surprises after you've committed.
The number we quote is the number you pay. No extras bolted on for BC queries, no awkward invoice three months later.
Recent Projects Near Devon
Bespoke / specific calcs
Two-storey extension
Two-storey extension
Loft conversion
New-build
Send plans. Get a quote. We handle the rest.
Send us your plans
Fixed fee quote within 24 hours. No obligation, no chasing.
What people say
Areas We Cover in Devon
Select your area below for local project data and a quote tailored to your location.
Frequently Asked
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.
Quote within 24 hours of receiving your plans — often much quicker. Standard delivery is 10 working days, but we can turn calculations around in as little as 1 working day if you need them urgently.
Based on our 9,000+ projects across England, structural calculations typically start from £500 + VAT depending on the complexity of the project.
Fees depend on the scope and complexity of your project. We provide clear, fixed-fee quotes within 24 hours so you know exactly what you'll pay before we start. No hidden costs, no extras for building control queries.
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. A cheaper set of calculations might get you through the door, but when building control query something or your builder can't follow the drawings, that's when it costs you. We include BC queries, an amendment, and a virtual site visit because that's where projects actually succeed or fail.
Local Area Information
Understanding Devon's unique characteristics helps us deliver precise structural solutions.
About Our Devon Structural Engineering Services
Structural Engineering Excellence in South West
Choosing the right structural engineer means finding someone who truly understands your area. We specialize in South West properties, working regularly with everything from Pre-Roman → Modern homes built with Cob and thatch cottages, granite farmhouses, seaside villas, modern housing. This local expertise ensures our designs satisfy Devon County Council (plus District & Unitary Authorities) building regulations efficiently.
Foundation Design for South West’s Soil Types
Successful structural projects begin with proper foundation design. South West’s typical Highly variable: Slate, sandstone, granite, and clay soils presents specific engineering requirements. Varied: Devonian slates, Culm Measures, Permian red beds, Dartmoor granite We incorporate this geological knowledge throughout our calculations, ensuring safe, durable foundations for extensions, conversions, and renovations.
Local Expertise, Professional Service
Diverse mix of rural cottages, coastal towns, and city suburbs This diversity means we’ve developed expertise across all property types – whether you’re extending a period property near Dartmoor & Exmoor National Parks, Jurassic Coast, Exeter Cathedral or renovating a modern home with easy access to M5 motorway, A38, A30, Great Western Main Line.
We maintain strong working relationships with Devon County Council (plus District & Unitary Authorities) building control, streamlining approvals for your project. Our structural calculations are accepted first time, avoiding costly delays.
Serving South West and Surrounding Areas
From our base serving South West (population: 1.2M), we provide structural engineering services for all types of residential projects:
• Loft conversions and dormer extensions
• Single and double-storey rear extensions
• Side return and wrap-around extensions
• Internal alterations and load-bearing wall removals
• Foundation design and underpinning calculations
Request Your Free South West Structural Engineering Quote
Starting your project? Get in touch with PorthouseDean for structural calculation pricing in South West. Expect our detailed, fixed-fee quotation within 24 hours.
Ready to get started?
Send us your plans for a fixed-fee quote within 24 hours. Or call us — we actually answer.
