PorthouseDean
UK Residential Structural Engineers

Structural Engineering Services

Extensions, loft conversions, new builds, wall removals — structural calculations for any residential project, anywhere in the UK. One dedicated engineer, and a delivery date you choose.

Tell us about your project
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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.

Structural Engineers For Hire — Find Out More

Our Architectural Partners

What we cover

Everything Building Control needs to approve your project first time.

  • Loft conversions — ridge beams, joists, wall plates and connections
  • Extensions — beams over openings, foundation design, roof junctions
  • New builds — structural design from ground to roof
  • Load-bearing wall removal and steel beam calculations
  • Basement conversions and retaining wall structural design
  • Structural advice and technical drawings for renovation projects
  • Building Control-ready documentation on every project
  • Contractor packs with clear drawings for site

What every quote includes

We don't strip things out to make the headline price look cheaper. This is the full package, every time.

Full structural calculations

Beam specs, column calculations, foundation details, load assessments — everything your project needs.

Building Control documents

Submission-ready, and 100% approved by building control: if yours aren't, you get a refund. Your engineer handles any queries from BC directly.

Contractor pack

Clear drawings and instructions to build from on site. Dimensions, connections and installation notes included.

A free change request

Building Control changes, contractor modifications, design adjustments — the first change is on us, and further changes cost less than a new quote.

£500,000 PI insurance

Professional indemnity cover on everything we produce.

Ground conditions check

Site-specific ground assessment integrated into the foundation design. Helps avoid unexpected foundation costs.

Virtual site visit

Included with every project. Your engineer guides you through capturing measurements and photos via video call.

Dedicated engineer

One person who knows your project. Not a different voice every time — same engineer from quote to Building Control.

Pay by card, bank transfer, or Klarna — split into 3 interest-free payments. See the full process →

How it works

From quote to delivery, the same process every time. No surprises.

Get a quote

Instant quote online, manual quote for complex work, or book a call to talk through your project first. Quote stays live — no rush.

Meet your engineer

One dedicated structural engineer is assigned to every project. They complete a virtual site visit (included), review your drawings, and become your single point of contact — from instruction through to Building Control approval.

Calculations and ongoing support

Full structural calculations and contractor pack on the date you choose. Building Control queries handled by your engineer. A free change request is included. Your engineer stays contactable throughout the build — not just during the calculation phase.

A delivery date you choose. 100% building control approval, or a refund. Dedicated engineer throughout. See how it works →

Get structural calculations for your project

A clear price and a delivery date you choose, and one dedicated engineer throughout.