South East & East England - 0208 183 4321
South West, Wales & Midlands - 01452 346 156
North England & Scotland - 0161 820 3230
We know Doncaster's housing stock and what Doncaster Metropolitan Borough Council expects
Wall and loft support for Doncaster home alterations.
Based in Manchester, with engineers around the country for site visits. We've worked extensively across South Yorkshire and know Doncaster well — the Medieval → modern Brick semis, council flats, the party wall situations that come with them.
More importantly, we know how Doncaster Metropolitan 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 Doncaster, and has delivered 9,000+ projects across England and Wales since 2012.
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 Doncaster
Single storey extension
Loft conversion
Other
Two-storey extension
Bespoke / specific calcs
Send us your plans
A fixed price before you commit. No obligation, no chasing.
What people say
Other Areas in South Yorkshire
Frequently Asked
It depends on the size and complexity of your project, so we don't publish a price range for Doncaster. 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 Doncaster's Medieval - modern properties. Our engineers aim to understand the specific requirements of your property from Brick semis, council flats construction, ensuring calculations that respect the original structure while meeting modern standards.
Doncaster typically has Alluvial clay. Alluvium over mudstone. We factor these conditions into our foundation designs, which may affect the depth and type of foundations required.
On a full plans application, Doncaster Metropolitan 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 Doncaster and the surrounding South Yorkshire 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 Doncaster's unique characteristics helps us deliver precise structural solutions.
Structural engineering services in Doncaster
Professional Structural Calculations for South Yorkshire Properties
Your project deserves engineers who know South Yorkshire inside and out. We work extensively with the area’s building heritage – Medieval → modern constructions using Brick semis, council flats. Our familiarity with Doncaster Metropolitan Borough Council processes means fewer queries and fewer complications for your project.
Structural Calculations Tailored to South Yorkshire Properties
Every area has its challenges. In South Yorkshire, we regularly work with Alluvial clay, which requires specific foundation design approaches. Alluvium over mudstone Our structural engineers account for these local conditions in every calculation, ensuring your extension, loft conversion, or structural alteration is built on solid foundations.
Experience Across South Yorkshire’s Property Types
From Suburban semis; post-war estates, we’ve worked on projects throughout South Yorkshire. Whether your property sits near Doncaster Racecourse; Yorkshire Wildlife Park or benefits from proximity to East Coast Main Line; A1(M), we understand the local context.
Our established relationship with Doncaster Metropolitan Borough Council building control helps expedite your project. We consistently deliver calculations that meet their standards, minimising delays and resubmissions.
Structural Engineering Services Throughout South Yorkshire
We provide comprehensive structural calculations across South Yorkshire (population: 310 k), 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
Structural Calculations Quote for Your South Yorkshire Project
Ready to move forward? Contact PorthouseDean for structural engineering services in South Yorkshire. We provide clear, competitive quotes within one business 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.
