Home Renovation Structural Engineering
Our Other Services Find out more about the expert service offered by our team of structural engineers. Whatever your need, we are here to help.
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.
House Extension Structural Engineer Drawings & Calculations
The skill set and experience of a structural engineer will be invaluable on a wide variety of different projects — particularly if you wish to make key renovations to your home.
Here is just a small sample of the key benefits you can come to expect on your house renovation project:
- Working For You: In addition to an online customer portal to provide immediate answers to a number of common questions, we also include one free change request as standard with all calculation packages (T&Cs apply).
- Sustainability Considerations: A virtual site visit is included as standard. We introduced this measure to significantly reduce our carbon footprint, without sacrificing on quality of service. Our engineers are specifically trained in carbon minimisation — to make sure that all projects are as environmentally conscious as possible.
- Reduce Costs: As well as our decision to favour virtual site visits over in-person ones, we will also aim to reduce steel and increase timber/brick work wherever possible — as this will be more locally sourced and therefore easier and likely cheaper to procure.
- Always on Hand: You don’t need to wait days on end for responses when you’re dealing with PorthouseDean. Our phone lines are open 9am-5pm daily, and we’re always there to respond to your email queries.
Our Architectural Partners
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.
Instant quote online, manual quote for complex work, or book a call to talk through your project first. Quote stays live — no rush.
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.
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 →
Ready to get started?
A clear price and a delivery date you choose. No obligation — the quote stays live so come back whenever you're ready.