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North England & Scotland - 0161 820 3230
We know Wirral's housing stock and what Wirral Council expects
Trusted structural calculations for extensions, lofts, and renovations across the Wirral.
Based in Manchester, with engineers around the country for site visits. We've worked extensively across Merseyside and know Wirral well — the Victorian → Modern Edwardian/Victorian villas, 1930s semis, Arts and Crafts homes, modern detached houses, the party wall situations that come with them.
More importantly, we know how Wirral 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 Wirral, 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 Wirral
Single storey extension
Single storey extension
Two-storey extension
Single storey extension
Other
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 the Wirral. Tell us about your project and you get a clear, fixed-fee quote before you commit.
Yes, a great deal. We frequently work on Victorian and Edwardian homes in areas like Oxton, West Kirby, and Hoylake, providing designs that are sensitive to their construction.
The prevalent boulder clay can have implications for foundation depth and design. We analyse the specific conditions to ensure your foundations are appropriately specified to prevent movement.
On a full plans application, Wirral 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 cover the entire Wirral peninsula, from Birkenhead and Wallasey to West Kirby and Heswall, and you choose your delivery date.
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 Wirral's unique characteristics helps us deliver precise structural solutions.
Structural engineering services in Wirral
Expert Structural Engineers Serving Merseyside
With extensive experience across Merseyside, our structural engineers combine technical excellence with detailed understanding of local building stock. From Victorian → Modern properties featuring Edwardian/Victorian villas, 1930s semis, Arts and Crafts homes, modern detached houses, we’ve worked on hundreds of projects throughout the area. Our calculations are specifically designed to meet Wirral Council requirements, ensuring smooth approval processes.
Calculations That Account for Merseyside’s Geology
Ground conditions vary significantly across regions. Merseyside presents its own considerations with Thick glacial till and tidal deposits over sandstone/mudstone. The peninsula features Triassic sandstones and mudstones, but is distinguished by significant cover of glacial and post-glacial deposits, including boulder clay and estuarine alluvium. Our engineers have extensive experience designing foundations for these local conditions, essential for any extension, conversion, or alteration project.
Serving All Merseyside Property Types
We regularly work with Mix of large Victorian/Edwardian villas, post-war semis, and unique properties in Port Sunlight throughout Merseyside. Whether you’re renovating near Port Sunlight Village, Birkenhead Park, New Brighton Lighthouse, Hilbre Island or extending a property with convenient access to M53 Motorway, Merseyrail Wirral Line, Birkenhead Hamilton Square Station, we bring relevant local experience.
Wirral 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 Merseyside
We provide comprehensive structural calculations across Merseyside (population: 323k), 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
Merseyside Structural Engineering – Request Your Quote
Begin your project with confidence. Contact PorthouseDean for structural calculation services in Merseyside. 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.