No hassle.
No stress.

Trusted to provide structural calculations by architects nationwide.
PorthouseDean Limited
Based on 91 reviews
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Navin ModiNavin Modi
22:35 17 Jun 22
Sam Dean at Porthouse Dean has delivered in a professional manner but with an ability to be personable. I would highly recommend their service.Yogesh and Anj Modi
Steve JacobSteve Jacob
12:16 30 May 22
This is definitely a 5 star service, I use porthousedean for all my structural calculations. A cut above the rest as far as i am concerned.
Andrei CharniauskiAndrei Charniauski
17:57 27 May 22
Best recommendations to PorthouseDean – really enjoyed working with you guys. Highly professional, listen to customer needs and great value. Thank you for your care – keep up the great work!
Judith DinsleyJudith Dinsley
08:22 21 Apr 22
Porthouse Dean have been brilliant, Akhil was so patient and nothing was to much trouble and other staff were very helpful too.I would recommend this company to anyone.
Rob MosleyRob Mosley
14:51 16 Mar 22
Great service – high quality documentation. Quick turnaround and Akhil even went above and beyond communicating direct with the Building Control people from the council to help us get approval.

Welcome to PorthouseDean

Triangle kitchen window

We are a trusted supplier of structural calculations for building regs applications for low-rise dwellings.

Specializing in bespoke extensions, loft-conversions, and new-build dwellings, PorthouseDean are preferred by architectural practices because we offer peace of mind through the consistency of our service – enabling them to streamline the process of producing building regulations drawings.

Whilst the quality and consistency of the documents we produce is paramount, PorthouseDean realises that just as much value is delivered through a reliable customer service. That’s why we aim to respond to all support requests within 1 day, and resolve them within 2 days. We also aim to issue all quotes within 2 days.

About Us

We have worked with PorthouseDean on a number of residential projects and they have always delivered an extremely professional and efficient service. As a busy architectural design company… PorthouseDean certainly meet our requirements for structural calculations.

Tom Millin, Architectural Consultant, London

Porthouse Dean have great knowledge within the industry, are easy to work with, reliable and affordable. Their team are friendly and always ready to help, we recommend them for all structural consultancy needs!

Paul Cramphorn, Architectural Consultant, London

PorthouseDean produce such high quality work that I now have no hesitation in submitting the plans into the local planning office as I know they will be no questions or remarks made…

Steve Vaughan, Architectural Consultant, Reading

I regularly work with Chris and his team to get structural calculations on my clients’ extension and loft conversion projects. They are always satisfied with the price and turnaround time. I highly recommend!

David Chamberlain, Architectural Consultant, Cardiff

I found the experience in dealing with Porthouse Dean most reassuring and satisfactory… They’re extremely professional and I have no hesitation in recommending them to any interested party.

Paul Noble, F.R.I.C.S., Lancashire

Very helpful and always happy to help with any question even if you think it is silly, been a pleasure to have you do work for me.

Greg Barton, Homeowner, Buckinghamshire

I’m very happy with PorthouseDean, they always deliver drawings that are clear, understandable and fit nicely with our organisation and way of doing business.

Paul Wickham, Builder, Ipswich

PorthouseDean is a very slick professional operation that delivers structural calculations and drawings in a modern way as opposed the traditional ‘old school’ way and treatment of an application.

Andrew Kelly, Builder, Bury

Excellent, professional and punctual. Would highly recommend.

Ricky Bahia, Homeowner, Gerrard’s Cross

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What we deliver

Peace of mind

Our documents follow a systematic in-house checking process – bringing peace of mind that the structure we specify is robust, and passed by building control.


Our service can slot into your own processes with a consistency that you will come to rely on. This provides us with the opportunity to refine processes to save your practice money.


We are clear about what we do, and we do exactly what we say. This gives our architectural partners the confidence to recommend us to their customers.


Your problem is our problem. If something arises that needs dealing with, we’ll cooordinate with building control, party wall surveyors, and homeowners, until things get sorted. In other words… we’ve got your back.


We treat all of our partners with the care and respect they deserve, and we only work with people that we enjoy working with. So you’ll enjoy working with us.


We’re never satisfied with the status quo and we’re always innovating –  particularly when it comes to new technology. This means you can expect ongoing improvements to our service, and new features which will make your life easier.

Our Clients