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About us • SECalcs structural engineers

About SECalcs – structural calculations for UK homes

★★★★★ 5.0 Google rating

150+ homeowner reviews mentioning clear drawings, prompt replies and smooth Building Control sign off.

SECalcs is a specialist structural engineering practice focused on domestic projects across the UK. We design RSJ beams, loft conversions, home extensions and structural alterations with clear calculations, fast turnaround and drawings that Building Control accepts without delay.

Core focus on home extensions, lofts and wall removals Building Control ready structural packs Serving homeowners, architects, builders and small developers

See our main services on the Structural engineering services page. Key pages include steel beam calculation, loft conversion structural engineer, extension structural design and load bearing wall removals.

Most of our work is for homes, not tower blocks. We spend our days looking at real UK houses, real drawings and real site photos. The goal stays the same: safe, practical structures that your builder can follow and your inspector can approve.

Every project is checked to the current Eurocodes with UK National Annexes. That is what Building Control expect to see on new work, from simple RSJs through to basements, retaining walls and portal frames.

Our promise ↓

We design structures that are safe and practical. We explain things in plain English. We deliver work when we say we will.

What you can expect

Fixed fees agreed before work starts, no surprise extras. Clear markups, beam sizes and notes that builders can follow. Helpful communication from first enquiry through to final sign off.

Who we help

Homeowners planning kitchen knock throughs, loft conversions and rear extensions. Architects and technicians needing structural support for drawings. Builders and small developers wanting fast, reliable calculations.

Qualified & Insured

All projects are designed by Chartered Structural Engineers (CEng) and covered by our full professional indemnity insurance for your peace of mind.

Eurocode Compliant

All designs checked to current Eurocodes & UK Annexes.

Our story – why SECalcs exists

SECalcs started with a simple idea. Most homeowners and builders want straight answers, not long reports. They want designs that are safe, buildable and delivered quickly so the project can move ahead without stress.

From messy reports to clear packs

Our engineers came from domestic and small scale commercial backgrounds. We kept seeing the same problems: unclear notes, slow communication and structural designs that made construction harder than it needed to be.

SECalcs was set up to fix that. We focus on tidy drawings, plain English notes and practical beam choices that keep rooms usable and ceiling heights comfortable.

Today we support thousands of UK clients with structural calculations that are easy to follow and ready for Building Control. Many projects repeat the same themes: RSJ beams for open plan kitchens, loft conversions, rear and side extensions and retaining walls in sloping gardens.

What guides our work

Residential focus: typical jobs are wall removals, lofts, extensions, basements and small frames.
Speed: most domestic projects complete within 24 to 72 hours once we have drawings and photos.
Clarity: every pack is prepared so builders and inspectors can see what is going on at a glance.
Support: we stay involved through Building Control queries and reasonable site questions.

What we do at SECalcs

The same structural thinking sits behind all our work. These are the services most people use us for. Each link goes to a dedicated page with detail and examples.

RSJ and steel beam design

Beam sizing, load bearing wall removals, padstones and bearings, chimney breast removals and connection forces.

Start with our steel beam calculation, wall removal and RSJ design pages.

Lofts and roof structures

Ridge beams, floor beams, dormers, hip and cranked steels and timber members sized for deflection and vibration.

See our loft conversion structural engineer and timber design pages.

Home extensions and basements

Foundations, ground beams, retaining walls, structural frames and slabs for rear, side and wrap around extensions.

Key pages include home extension structural engineer, footings for extension, basement design and retaining walls.

Portal frames and concrete design

Steel portal frames for small warehouses and workshops, mezzanine floors, steel columns and reinforced concrete beams, columns and slabs.

See portal frames, mezzanine floors, RC beams and RC columns.

Structural checks and reports

Subsidence checks, crack assessments and defect investigations for houses, extensions and small commercial units. We focus on clear explanations, not long jargon heavy reports.

Many issues link back to masonry walls, slabs or industrial ground floors.

Where we work

We work nationwide from our central office and regularly support projects in London, Manchester, Birmingham, Bristol, Leeds and other UK cities.

For home extension hotspots see our pages for Didsbury, Sale, Wimbledon, Clapham and Hampstead.

How we work on your project

The process is the same whether you need a single RSJ or a full structural pack for an extension or loft conversion.

1. Send drawings and photos

You share architect plans, sketches or measured photos along with the property address. We check what is needed and confirm whether site visits are required.

2. Agree the scheme and fee

We agree the structural scheme, list of elements and any assumptions. You get a fixed fee and a realistic turnaround, usually 24 to 72 hours for typical domestic work.

3. Calculations and drawings

We design beams, walls, slabs, foundations and frames, then issue drawings, markups and calculation sheets in PDF. Everything is prepared ready for Building Control submission.

4. Support through to sign off

If your Building Control officer or warranty provider has questions, we reply and update where agreed. We also answer reasonable questions from your builder during the build.

Our YouTube channel – structural engineering in plain English

We share the same approach online as we do in our day to day work: clear explanations, simple diagrams and practical checks. Our channel has more than 50,000 subscribers, many of them builders, technicians and homeowners trying to understand the basics.

How to do a steel beam calculation

This video walks through a typical steel beam design for a domestic RSJ, including load paths, bending, shear and deflection checks. .

More videos from SECalcs

5 top equations for steel truss design – a popular video with over 170,000 views explaining the main checks behind a simple steel truss.
Browse all content on our channel @structuralengineercalcs for clips on beams, timber floors, portal frames and more.
Many clients watch these videos before or after using us, so they understand what their structural pack is doing.

e.g. Planning a wall removal?

Living Room

Kitchen

Timber floor joists

Proposed RSJ

Talk to us about your structural calculations

Use this form if you would like to speak to an engineer about a specific project. Your enquiry goes straight to SECalcs, not a call centre.

Send us a short outline

Share a few details so we can confirm which service fits your project and send a fixed fee for the calculations and drawings.

Name Required

Email Required

Phone Optional

Project postcode Town and area

Project type Select the closest match

Project details Drawings, photos and timings

You will usually hear back from a structural engineer within one working day.

Prefer to speak first?

Email

info@structuralengineercalcs.com

Phone

07359 267907

Typical response

Within one working day for most enquiries.

Common areas we cover

London and the South East, Manchester and Greater Manchester, Birmingham and the West Midlands, Bristol, Nottingham, Leeds, Sheffield, Liverpool and surrounding towns. For projects further afield, send the details and we will confirm if we can help.

Many projects can be designed from drawings, photos and basic measurements. If a visit is needed we will explain why and include it as part of your quote.

Ready to move your project forward with clear structural calculations?

If you are planning a home extension, loft conversion, wall removal, basement or small commercial scheme and need structural calculations that Building Control can accept without delay, send us a short outline today.

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