PorthouseDean
For homeowners

Your home project, minus the stress.

Knocking through, extending, converting the loft? We do the structural calculations — and we make the whole thing feel effortless. You'll always know exactly what's happening, when it's happening, and what's yours to do.

★★★★★ Rated excellent 100% Building Control approval, or a refund One free change included
Completed extension and loft conversion, Richmond
Extension & loft conversion — Richmond, Southwest London

The journey, start to finish

A clear sequence — your project coordinator guides each step, and your hub shows exactly where you are.

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Your quote

Instant or manual — your choice

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Instruct online

Accept when you're ready

3
Virtual site visit

We get the design right first time

4
Engineering underway

Live updates, due dates you can see

5
Clear documents issued

Building Control-ready, checked

6
Free change if needed

Because things change

While we work, you're never idle: your hub tells you what you could be getting on with — lining up your builder, building control, party wall notices — so the project keeps moving.
Your price, your timeline

Pick the date that suits you — at the price that suits you.

We specify the scope and give you a clear price. Then you choose the delivery date: sooner costs a little more, later costs a little less.

Get your price ›
34 Linton Street, N1
Example quote · loft conversion · dormer · 2 steels
Structural calculations & drawingsincluded
Virtual site visitincluded
One change after documentsincluded
Thu 15 Oct soonest£1,140
Fri 23 Oct £995
Tue 3 Nov cheapest£895
Your price£895
No chasing

See everything. Chase nothing.

Your hub shows what's happening, what's next, and what you could usefully be doing in the meantime. Messages, documents and invoices live in the same place — so nobody's digging through email chains or waiting for a call back.

porthousedean.co.uk/hub
Your hub — live project view
Right first time — flexible when it isn't

A virtual site visit up front. A free change built in.

Your virtual site visit means we understand the design before we calculate — right first time. But we know real projects change, so your first change after documents is free, tracked in your hub like everything else.

Document record · 34 Linton Street
A
Calculation pack issuedRev A · 12 May
CR
Free change used — beam moved 400mmRaised in the hub · 3 Jun
B
Revised pack issuedRev B · current · 6 Jun

What working with us replaces

No more…

✗ Chasing one engineer who's gone on holiday
✗ Confusing pricing and surprise extras
✗ Wondering when your documents are actually due
✗ Documents your builder has to query line by line

With PorthouseDean

✓ A team of engineers based in the UK, plus dedicated support
✓ A clear price, and a date you choose
✓ Live updates and due dates you can see, right there in your hub
✓ Clear, consistent packs: 100% Building Control approval, or a refund

What we cover

Structural calculations and drawings for building regulation applications on low-rise dwellings.

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Loft conversions — dormers, hip-to-gables, mansards
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Extensions — single & double storey, side returns, wraparounds
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Wall removals — knock-throughs & chimney breasts
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New builds — full packages, foundations to roof
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Garage conversions — lintels, infills, floor build-ups
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Porches & smaller works — lift apertures, canopies
Most of this is priced instantly online. Larger or unusual jobs are quoted to scope, quickly.

Recent projects

Extension and loft conversion, Richmond

Extension & loft conversion

Richmond, Southwest London

Loft conversion, Camden

Loft conversion

Camden, North London

Extension, Potters Bar

Extension

Potters Bar, Hertfordshire

Extension, Stockport

Extension

Stockport, Greater Manchester

A team on your project — not a lone engineer

Nobody's project waits for someone's holiday. A team of engineers based in the UK, dedicated coordinators and technical support share the load.

ChrisChrisDirector
JustynaJustynaStructural Engineer
SalekhSalekhStructural Engineer
GreeshmaGreeshmaStructural Engineer
SamSamEngineering & Product

Good to know before you start

From the Advice Centre — plain-English answers to the questions every project raises.

Start with a price, not a phone call.

A clear structural engineering price in the next two minutes — instruct whenever you're ready.

Get a quote