South East & East England - 0208 183 4321
South West, Wales & Midlands - 01452 346 156
North England & Scotland - 0161 820 3230
Structural Engineers in Kent
Residential structural engineering that doesn't leave you guessing
Expert structural calculations for extensions, lofts, and renovations in Kent, Kent.
We know Kent's housing stock and what Kent County Council expects
Offices in Manchester, London and Gloucester, with engineers around the country for site visits. We've worked extensively across Kent — the Iron Age → modern Ragstone, brick, the party wall situations that come with them.
More importantly, we know how Kent County 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 Kent. With 220+ calculations completed across Kent, our engineers understand the area's Iron Age → modern Ragstone, brick properties, ensuring every design accounts for local building characteristics and Chalk & Thanet Sands ground conditions. Our most recent project in the area was a single storey extension completed in Dec 2025.
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 220+ 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 Kent
Single storey extension
Single storey extension
Knock-through
Loft conversion
Single storey extension
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 Kent
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 220+ projects across Kent, structural calculations typically start from £500 + VAT depending on complexity.
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 Kent's unique characteristics helps us deliver precise structural solutions.
About Our Kent Structural Engineering Services
Expert Structural Engineers Serving Kent
With extensive experience across Kent, our structural engineers combine technical excellence with detailed understanding of local building stock. From Iron Age → modern properties featuring Ragstone, brick, we’ve worked on hundreds of projects throughout the area. Our calculations are specifically designed to meet Kent County Council requirements, ensuring smooth approval processes.
Calculations That Account for Kent’s Geology
Ground conditions vary significantly across regions. Kent presents its own considerations with Chalk & Thanet Sands. Chalk downland; London Clay Our engineers have extensive experience designing foundations for these local conditions, essential for any extension, conversion, or alteration project.
Serving All Kent Property Types
We regularly work with Historic towns, coastal villages throughout Kent. Whether you’re renovating near Canterbury Cathedral; White Cliffs or extending a property with convenient access to HS1; M2; Southeastern, we bring relevant local experience.
Kent County Council building control knows our work and trusts our calculations. This established reputation translates to smoother approval processes and fewer obstacles for your project.
Structural Engineering Services Throughout Kent
We provide comprehensive structural calculations across Kent (population: 1.8 M), covering:
• Loft conversions and dormer additions
• Rear extensions – single and double storey
• Side and wrap-around extensions
• Load-bearing wall removal calculations
• Foundation designs and underpinning assessments
Kent Structural Engineering – Request Your Quote
Begin your project with confidence. Contact PorthouseDean for structural calculation services in Kent. Our fixed-fee quotations arrive within one working day.
Ready to get started?
Send us your plans for a fixed-fee quote within 24 hours. Or call us — we actually answer.
