Structural Engineer Calcs London

What Structural Engineer Calcs London does

Structural Engineer Calcs London (trading as SECalcs / SECalcs Structural Engineering) is a UK-based chartered structural engineering consultancy that delivers fixed-fee Building Control-ready structural calculation packs and drawings for residential and small commercial projects. The firm operates from a single headquarters in Uxbridge and serves homeowners, architects and builders across the United Kingdom without requiring site visits for most jobs. Core services include load-bearing wall removal / RSJ beam calculations (from £150), home extension structural design (from £550), loft conversion structural design including hip-to-gable variants (from £450 / £600), structural surveys and inspections (from £400), foundation and footing design, chimney breast removal calculations, and new build structural design priced on application. All outputs are produced as PDF calculation packs covering steel design to BS 5950 / BS EN 1993, timber to BS 5268 / BS EN 1995, concrete to BS 8110 / BS EN 1992, and foundations to BS 8004, plus structural drawings and padstone schedules formatted for UK Building Control submission.

The company's underlying technology stack consists of chartered engineering expertise applied against British Standards and Eurocodes, supported by a self-developed browser-based FEA tool, ProBeam V2.0, which is offered free of charge as a top-of-funnel acquisition asset and is not used for Building Control submissions. There is no public API, SDK or mobile app; all customer engagement is mediated through website quote forms, phone and email during stated business hours (Mon-Fri 09:00–17:00, Sat 09:00–18:00), with average quote response times of approximately 45 minutes and typical project turnaround of 24–72 hours.

Commercially, the business runs a project-based, fixed-fee revenue model with no hourly rates and no hidden charges; all fees are confirmed in writing before work begins and include reasonable revisions and direct engineer support through the Building Control approval process. Customer acquisition is primarily digital: city-specific landing pages covering more than 17 UK cities, an educational blog optimised for search, a YouTube channel of foundation-design tutorials, a Facebook page, and the free ProBeam tool drive organic lead flow into the bottom-of-funnel quote forms. The firm is a privately held limited company (Structural Engineer Calcs Ltd, Company No. 12653163, registered in England & Wales), was founded in 2016 per firmographic records, operates with 1–10 employees, and cites 2,100+ Building Control-approved projects, 150+ five-star homeowner reviews, and 20+ years of engineering experience as its principal credibility markers.

Name

Structural Engineer Calcs London

Legal name

Structural Engineer Calcs Ltd

Website

https://structuralengineercalcs.com

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

1–10 employees

Short description

UK-based chartered structural engineering consultancy offering fixed-fee Building Control-ready calculation packs and drawings for residential projects (wall removals, extensions, loft conversions, surveys), serving homeowners, architects and builders nationwide without site visits.

Ownership category

akta.pro rank

Product category

Structural Engineering Consultancy

NAICS

Engineering Services (541330), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Testing, Inspection, Certification & Commissioning (TICx) Technical Services (BPAHAIAL)

Keywords

• Structural engineering calculations
• Load bearing wall removal
• Loft conversion design
• Home extension design
• Building control calculations

Headquarters

HQ city

Alton

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Marketing or Sales, Technology or R&D, Operations, Infrastructure, Others

Revenue model

1. Fixed-Fee Structural Calculation Services: One-time project-based professional services fees for structural calculations, drawings, and Building Control submission packs. Pricing is fixed upfront per project type (wall removal, loft conversion, extension, etc.) with no hourly rates or hidden charges. Revenue is earned per project completion.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Structural Engineer Calcs London (SECalcs) is a UK-based firm of Chartered Structural Engineers that delivers fixed-fee structural engineering calculations, drawings, and Building Control-ready PDF calculation packs for residential and small commercial projects. Core work covers wall removals with RSJ/steel beam design, home extensions, loft and hip-to-gable conversions, structural surveys and inspections, foundation and footing design, chimney breast removals, and new build structural design, all produced to British Standards and Eurocodes. A free in-house browser-based FEA beam analysis tool (ProBeam V2.0) is offered alongside the paid professional services.

Product overview

Structural Engineer Calcs London is a UK-based firm of Chartered Structural Engineers offering fixed-fee structural calculation and drawing services for residential and small commercial projects. The core offering is a portfolio of Building Control-ready calculation packs: Structural Wall Removal / RSJ Beam Calculations (from £150), Home Extension Structural Design (from £550), Loft Conversion Structural Design (from £450), Hip-to-Gable Conversion Structural Design (from £600), Structural Surveys and Inspections (from £400), New Build Structural Design (POA), Foundation and Footing Design, Chimney Breast Removal Calculations (from £350), and Building Regulations Structural Calculations (from £245). These services are complemented by a free online tool, ProBeam V2.0 Online Beam Calculator, a browser-based FEA beam analysis tool for educational and preliminary design checks. All paid services produce PDF calculation packs with structural drawings, padstone schedules, and connection details formatted for Building Control submission across UK local authorities. The company operates remotely from drawings and photos for most residential projects, with turnaround times of 24–72 hours for simple jobs and 5–7 working days for complex packages.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Wall Removal / RSJ Beam Calculations Chartered engineer calculations for removing load-bearing walls and installing RSJ steel beams, including padstone design, bearing length calculations, and masonry bearing stress checks. Delivered as a Building Control-ready PDF calculation pack from £150 for a single RSJ or wall removal.
• Home Extension Structural Design Complete structural design package for single-storey, double-storey, side, rear, and wraparound home extensions, covering steel beam sizing over openings, foundation design, floor joist sizing, and roof structure calculations to Building Control standards. Full extension packages £550–£1,500.
• Loft Conversion Structural Design Structural calculations for dormer, hip-to-gable, and Velux loft conversions, including ridge beam design, floor joist strengthening, dormer support framing, and stair trimmer beam calculations. From £450, with standard designs £395–£1,000.
• Hip-to-Gable Conversion Structural Design Specialised structural design for hip-to-gable loft conversions on semi-detached properties, covering gable wall structural frame, hip rafter removal, purlin redistribution, ridge beam upgrade, and party wall interface drawings. £600–£1,200.
• Structural Surveys and Inspections Professional structural inspections and written engineer's reports covering crack assessment and monitoring, subsidence investigation, structural defect diagnosis, foundation assessments, and repair specifications, accepted by mortgage lenders, solicitors, and insurers. From £400; building inspection reports £250–£600.
• New Build Structural Design Full structural design package for new residential builds, garages, outbuildings, and small commercial structures, including foundation, frame, and roof design coordinated with architects and submitted for Building Control approval. Price on application (POA).
• Foundation and Footing Design Foundation design for extensions and new builds, covering strip footings, trench fill, pad foundations, raft slabs, and retaining walls, including soil type assessment, footing depth calculations, tree influence zones, and drain protection specifications.
• Chimney Breast Removal Calculations Structural calculations for partial or full chimney breast removal across single and multiple floors, including beam design and load transfer at each affected floor level, padstone details, and stack support calculations. From £350.
• ProBeam V2.0 Online Beam Calculator Free browser-based FEA beam analysis tool for educational and preliminary design checks. Allows users to build beam models with nodes, supports, and loads and visualises shear force, bending moment, and deflection diagrams in real time. Not suitable for Building Control submissions.
• Building Regulations Structural Calculations Building Control submission-ready structural calculation packs demonstrating compliance with Approved Document A (Structure) and Part C of the Building Regulations 2010, covering loading schedules, beam/lintel design, column design, foundation design, connection details, general arrangement drawings, and material specifications. From £245.

Quantifiable outcome

• 24 to 48 hour typical turnaround for structural calculations
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators4 records

Recent moves4 records

Expansion highlights4 records

Direct peers

• Price & Myers: London-based structural engineering consultancy serving residential, commercial and heritage projects with calculation and design services. Comparable to SECalcs as a UK-focused structural engineering firm with strong residential workflow, though typically serving larger and more complex projects.
• Heyne Tillett Steel: UK structural and civil engineering consultancy with significant residential and refurbishment workload alongside commercial projects. Comparable to SECalcs in providing structural calculations and design for UK building projects, though operating at a larger scale and broader project mix.
• Calcinotto: Independent UK structural and civil engineering consultancy with a residential and commercial building focus. Comparable to SECalcs in delivering structural calculations and design for UK property projects, with overlapping homeowner, architect and builder client segments.

Broad incumbents

• WSP: Global professional services firm with a substantial UK structural engineering practice covering buildings, transport and infrastructure. Comparable as a provider of structural engineering services to UK clients, but operating as a multi-disciplinary incumbent rather than a residential specialist.
• Arup: Global engineering consultancy with deep UK structural engineering capability across residential, commercial and infrastructure sectors. Comparable as a UK structural engineering service provider, though much larger and project-diverse relative to SECalcs' residential niche.
• Curtins: Established UK structural and civil engineering consultancy with offices nationwide. Comparable to SECalcs in delivering structural design and calculation services for UK buildings, but with a far larger headcount and broader infrastructure, commercial and residential portfolio.
• Buro Happold: International engineering consultancy with a strong UK structural engineering practice in buildings, sustainability and infrastructure. Comparable in delivering structural calculations and design for UK projects, though typically engaged on larger and more complex builds.
• Mott MacDonald: Global engineering, management and development consultancy with significant UK structural engineering delivery. Comparable as a UK structural services competitor for building projects, but with a much broader infrastructure and commercial mix than SECalcs' residential focus.
• BDP (Building Design Partnership): Major UK multi-disciplinary design practice integrating architecture, engineering and consultancy with structural engineering capability. Comparable in providing UK structural engineering services to building projects, though as part of a much wider design portfolio.
• AKT II: London-headquartered structural and civil engineering consultancy working across residential, commercial and tall-building projects. Comparable as a UK structural engineering firm providing calculation and design services, with overlapping residential extension and refurbishment work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/home?lang=en-gb
• YouTubeyoutube.com/@structuralengineercalcs
• Facebookfacebook.com/stucturalengineer.calcs.7
• LinkedInlinkedin.com/company/structural-engineer-calcs

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Structural Engineer Calcs London