South East & East England - 0208 183 4321
South West, Wales & Midlands - 01452 346 156
North England & Scotland - 0161 820 3230
Basement Structural Engineer
Basement foundation and structural engineering calculations for new basements, conversions and alterations. Safe, coordinated design for structurally critical work, with one dedicated engineer throughout.
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.
Basement Structural Engineering Calculations
Regardless of whether your project centres around a new build basement, adding one to a pre-existing structure, or converting one for a different purpose, it’s important that you have a structural engineer as part of your team. Any significant work done to a building’s foundations could lead to major issues with stability and structural integrity. Our expert team is here to support you throughout the process, to ensure that everything goes smoothly and safely.
Selecting the right structural engineer can be the difference between structural work being done properly the first time and months of delays while work has to continue. PorthouseDean strives to provide you with a service that you can trust from start to finish.
Basement Foundation Structural Engineering
When an architect or other stakeholder brings one of our expert structural engineers onto a basement project, everybody can be safe in the knowledge that our team will provide you with top-tier design work at all times.
It’s vital that you speak to a structural engineering firm that you can trust. The benefits of PorthouseDean include:
- Secure Work: Poor planning can result in damage, including insufficient reinforcements potentially leading to cracking and water ingress, and digging in the wrong place undermining the existing foundation. We utilise an independently audited ISO 9001:2015 quality management system to ensure our level of service remains consistent.
- On Your Terms: Every project is assigned a dedicated project coordinator. These coordinators will oversee every aspect of the work, however you need it. Our service includes one free change request, as well as a Virtual Site Visit should you require one (T&Cs apply).
- Meet Codes and Regulations: Building codes and regulations will vary depending on location and the type of project in question. An experienced PorthouseDean structural engineer will be well-versed in this field, and can ensure that all designs provided meet all requirements.
- Straightforward and Cost Effective: Everything done by a member of our team is trained to maximise client budgets, while minimising potentially time-consuming issues. This is done by ensuring that work is simple and easy to understand, minimising possibly expensive delays in the process.
Our Architectural Partners
What we cover
Everything Building Control needs to approve your project first time.
- Basement foundation and structural stability calculations
- Design support for new basements, conversions and alterations
- Assessment of structural risk where significant ground works are involved
- Building Control-ready documentation pack
- Practical detailing to help avoid expensive site mistakes
- One dedicated engineer and coordinated project support
- A free change request on every job
- Quality-assured design for structurally critical work
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.
Send your drawings, scope and any known constraints. Basement work is structurally critical, so we review the scheme carefully before confirming scope and price.
One dedicated engineer reviews the basement design, structural risks and site constraints. You have one clear contact throughout the process.
We issue the structural calculations and design information your basement project needs for Building Control. A free change request is included, with ongoing engineer support for queries.
A delivery date you choose. 100% building control approval, or a refund. Dedicated engineer throughout. See how it works →
Need a basement structural engineer?
A clear price and a delivery date you choose. Safe, coordinated basement structural design with one dedicated engineer and practical Building Control support.
