Do I need a structural engineer for a loft conversion?

Yes. A loft conversion changes how the roof and floor carry load. A qualified structural engineer checks joists, beams, supports and overall stability so Building Control can approve it.

Do I legally need a structural engineer?

For any work that affects structure, such as new openings, loft conversions or extensions, Building Control expects proper structural calculations and drawings. If unsure, ask us and we will confirm what is required.

How much does a structural engineer report cost in the UK?

A structural inspection and written report typically costs between £350 and £650 plus VAT depending on the property. Calculation packs for Building Control are quoted separately.

How much does a structural engineer charge for a load bearing wall?

Non load bearing wall checks can start from about £250. A new opening in a load bearing wall often starts around £500 plus, as we confirm load paths and design the RSJ or steel beam, bearings and padstones.

How much does a full structural survey cost?

A full RICS building survey usually costs £500 to £1,500 and is carried out by a chartered surveyor. Structural engineers provide calculations and drawings for construction and Building Control sign off.

Why use a local structural engineer?

A local engineer understands common house types, soils and local Building Control requirements, which helps approvals go faster and reduces revisions.

What is foundation design and why is it important?

Foundation design sizes footings to carry loads safely into the ground. We consider soil type, bearing capacity, clay movement, water table and depth to prevent cracking and settlement.

How much should I pay a structural engineer near me?

Prices vary with span, loads and complexity. As a guide, wall removals start from £195, loft conversions from £450, and extensions from £550. Ask for a fixed quote that includes Building Control ready calculations and drawings.

Should I call a structural engineer?

Yes, if there are concerns about cracks, sagging floors, roof deflection, lintels dropping or movement around an opening. An engineer will confirm if it is cosmetic or structural and advise next steps.

Do I need a structural engineer to remove a wall?

If the wall is load bearing you will need calculations before removal. We design the correct RSJ or steel beam with bearings and padstones, which Building Control will request. We can also confirm if a wall is not load bearing.

What does a structural engineer do?

A structural engineer ensures buildings are safe and stable. We design beams, columns and foundations, assess load bearing walls and provide calculation reports for Building Control.

Is it worth getting a structural engineer?

Yes. Proper design prevents on site mistakes, keeps your project compliant with the Building Regulations and usually saves money by getting the specification right first time.

At what point do I need a structural engineer?

Engage a structural engineer whenever you change the structure, for example removing a wall, adding an RSJ, converting a loft or building an extension. Involve us early so the design guides your architect and builder.

How to find a good structural engineer?

Choose someone local, experienced and insured. Check reviews, ask if they are chartered such as MIStructE or MICE, and review recent projects. Local knowledge helps with Building Control.

Can you get a free quote from a structural engineer?

Yes. We provide free, no obligation quotes from drawings or photos and confirm price and turnaround within 24 hours.

Mon - Fri 09:00-17:00

+ (44) 07359 267907

info@structuralengineercalcs.com

Structural Engineer UK Fixed-Fee Calculations • Building Control Ready • Nationwide

Chartered structural engineers providing fixed-fee calculations from £150. Wall removals, loft conversions and extensions designed to Building Control standards. Delivered in 24 to 48 hours. Quote within 1 hour.

✓Building Control Ready

✓Fixed Fees From £150

✓2,100+ Projects Approved

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What We Do

Structural Engineering Services

Professional structural calculations and drawings for residential and commercial projects across the UK.

🏗️

Home Extensions

Single and double storey extension design. We size your foundations, beams and structural openings so Building Control can sign off.

Foundation design and depth calculations
Steel beam and RSJ specifications
Roof and floor joist layouts
Building Control drawings

From £550

Learn More →

🏠

Loft Conversions

Structural calculations for dormer, hip-to-gable and Velux loft conversions. Floor strengthening, ridge beams and support design.

Existing structure assessment
New floor joist sizing
Ridge beam and support design
Stairwell opening calcs

From £450

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🔨

Load Bearing Wall Removal

RSJ and steel beam design for removing internal walls. Includes padstone details, bearing lengths and temporary support notes.

Load assessment and beam sizing
Padstone and bearing design
Connection details for builder
Temporary works advice

From £150

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📐

Structural Calculations

Chartered engineer calculations for Building Control. Beams, lintels, columns, foundations and floor design to British Standards.

BS 5950 / BS EN 1993 steel design
BS 5268 / BS EN 1995 timber design
BS 8110 / BS EN 1992 concrete design
Foundation design to BS 8004

From £150

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🔍

Structural Surveys

Professional structural inspections for cracks, movement, subsidence and building defects. Written engineer's report with repair recommendations.

Crack assessment and monitoring
Subsidence investigation
Structural defect diagnosis
Repair specification and costings

From £400

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🏗️

New Build Design

Complete structural design for new residential builds, garages, outbuildings and commercial structures.

Full structural design package
Foundation, frame and roof design
Coordination with architect
Building Control submission

POA

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How It Works

Get Building Control Approval in 4 Steps

Most projects don't need a site visit. Send photos, get calculations and drawings, submit to Building Control.

Send Details

Email or upload your drawings, photos and project brief. We'll review the structure and confirm what's needed for Building Control.

Fixed Quote

You receive a clear scope of work, fixed price (no hourly rates) and turnaround time. Typically respond within 1 hour during business hours.

Design and Calcs

We prepare Building Control-ready calculations, structural drawings, RSJ sizes, padstone details and connection notes your builder can follow.

BC Support

If Building Control asks questions, we respond directly. Reasonable revisions included. You get direct engineer support until sign-off.

Client Reviews

What Our Clients Say

Real feedback from homeowners, architects and builders we've worked with.

★★★★★

"I used SECalcs for the structural design of my large extension. Very helpful and quick to answer all my queries. They gave me a clear breakdown of their quote and produced a comprehensive set of drawings and calculations."

David Holdham

Home Extension • Building Regs Approved

★★★★★

"The speedy service from SECalcs was second to none. I was apprehensive about undertaking my building works, but SECalcs made the whole process easy. I had my calculations within a few days."

Declan Price

Wall Removal • RSJ Design

★★★★★

"We have worked with SECalcs for over 10 years and found their engineering to be sensible and efficient. They consistently deliver practical designs that work on site."

Construction Partner

Ongoing Partnership • 10+ Years

Common Questions

Frequently Asked Questions

Quick answers to the most common questions about structural engineering services.

How much does a structural engineer cost in the UK? ▼

Structural engineer costs in the UK typically range from £150 for a single RSJ or wall removal calculation to £550–£1,200 for a full extension or loft conversion design package. At SECalcs, all fees are fixed — you receive a clear quote before any work begins, with no hourly rates or hidden charges. For a detailed breakdown, see our structural engineer cost guide.

Do I need a structural engineer to remove a load bearing wall? ▼

Yes. Building Control requires structural calculations to approve load bearing wall removals. A structural engineer will assess the loads above the wall, design the correct steel beam (RSJ) size, specify padstone details and bearing lengths, and produce drawings your builder can follow. Without these calculations, Building Control will not sign off the work. See our wall removal cost guide for pricing.

How long do structural calculations take? ▼

Most residential structural calculations are completed within 24 to 48 hours after instruction. Simple RSJ designs for wall removals can sometimes be turned around the same day. Extension and loft conversion packages typically take 3 to 5 working days depending on complexity.

Do I need a site visit for structural calculations? ▼

Most residential projects do not require a site visit. Structural calculations can be completed from your architectural drawings, photographs and measurements. If the existing structure is concealed or loads are uncertain, the engineer may recommend a visit or limited opening-up to confirm assumptions.

What is included in a structural calculation package? ▼

A structural calculation package includes signed engineer calculations (PDF), structural drawings showing beam sizes, foundation details and connection specifications, padstone and bearing design where applicable, temporary works advice for the builder, and direct Building Control support if the inspector raises queries. Everything your builder needs to complete the work and satisfy the inspector.

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