Structural Engineers in
West London

Looking for structural engineers in West London? LENIO Consultants provides chartered structural design, calculations and independent structural surveys across West London, from load-bearing wall removals, loft conversions and extensions to basements, period-facade repairs and crack diagnosis. Every project gets a fixed, no-obligation quote and Building Control-ready calculations, usually within a few working days.

Chartered & Local

Structural Engineers Across West London

A structural engineer designs and assesses the load-bearing parts of a building, its foundations, beams, columns, walls and roof, so your project is safe, stable and compliant with the Building Regulations (Part A).

LENIO Consultants is led by chartered engineers (members of the ICE and CABE) with professional indemnity insurance and extensive experience of West London property, from Ealing and Chiswick terraces to Kensington and Chelsea mansion blocks. We produce clear calculations, drawings and reports your builder, building control, solicitor or insurer can rely on.

Speak to a West London Engineer

Why homeowners choose LENIO

You do not need to understand structural engineering before you call. We explain what your project needs, provide a fixed quote up front, and design directly from your architect’s drawings, so most West London projects are turned around quickly and pass building control first time.

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What We Offer

Structural Engineering Services in West London

A complete residential and commercial structural service across every West London borough.

Calculations & RSJ Beams

Building-control-ready structural calculations and steel (RSJ) beam design for openings, knock-throughs and alterations, with beam sizing, padstones and connection details.

Extensions & Loft Conversions

Beam and foundation design for rear, side-return and wrap-around extensions and loft conversions, including ridge beams, dormers and new openings.

Load-Bearing Wall & Chimney Removal

Safe design for removing load-bearing walls and chimney breasts, a common project in West London’s solid-brick Victorian and Edwardian terraces.

Basements, Underpinning & Retaining Walls

Structural design for basement excavation, underpinning and retaining walls, including support for Basement Impact Assessments, common in Kensington, Chelsea and Notting Hill.

Porticos, Balconies & Period Facades

Assessment and repair design for porticos, balconies, balustrades and stucco facades on West London’s grand period buildings, including corroding embedded reinforcement.

Structural Surveys & Reports

Independent surveys and reports for cracking, movement, pre-purchase, mortgage retentions and insurance, with the cause, risk and remedy set out clearly.

Feasibility & Value Engineering

Early-stage feasibility advice and value engineering, refining steel and layout to build efficiently and control cost without compromising safety.

Retrospective Calculations

Structural assessments and regularisation calculations for work built with no Building Control record, common when buying or selling a West London home.

Expert Reports & Listed Buildings

Expert structural reports for disputes and defects, plus sensitive design for listed buildings and properties in West London conservation areas.

Explore our structural design services and structural survey services in more detail.

Local Knowledge

Structural Engineering for West London Homes

West London has some of the most valuable and architecturally rich property in the capital. Solid-brick Victorian and Edwardian terraces fill Ealing, Chiswick, Acton, Hammersmith, Fulham and Shepherd’s Bush, while grand stucco villas, mansion blocks and period conversions define Kensington, Chelsea, Notting Hill, Holland Park and Earls Court. Richmond, Twickenham and Brentford add riverside and suburban homes to the mix.

Each brings its own engineering demands. Solid-brick terraces need careful padstone design for beam bearings and chimney-breast removals; grand period buildings often have porticos, balconies and balustrades with embedded reinforcement that corrodes over time; many properties are mansion-block or period-conversion flats where the freeholder’s consent is required before structural work; and much of West London falls within conservation areas or is listed, so alterations must be designed sensitively. High-value basement excavations in Kensington and Chelsea also need underpinning, retaining walls and a Basement Impact Assessment. Where a beam or excavation sits close to a boundary, the Party Wall etc. Act 1996 can also apply, and our sister practice LENIO Party Wall Surveyors can handle that side.

Typical West London projects we design:

Rear, side-return and wrap-around extensions
Loft conversions with steel (RSJ) beams
Removing load-bearing walls and chimney breasts
Basements, underpinning and retaining walls
Portico, balcony and period-facade repairs
New builds, mansion-block and conversion works
Crack, movement and subsidence investigations
Pre-purchase, mortgage and insurance reports

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Transparent Fixed Fees

Structural Engineer Costs in West London

A guide to typical fixed fees for residential work in West London. We confirm your fee in writing before we start, so there are no hidden hourly rates.

Service	Typical fee (West London, 2026 guide)	What is included
Load-bearing wall removal / RSJ beam	from £300	Beam sizing, padstones, masonry checks, Building Control drawing
Single structural calculation	from £300	Calculations and drawing for one element, Building Control ready
Rear or side extension design	£450 to £900	Foundations, beams, steelwork and Building Control pack
Loft conversion calculations	from £550	Ridge beam, floor joists, dormer supports and connections
Structural survey / inspection report	£600 to £1,500	Cracks, movement and defects, pre-purchase or mortgage report
Basement, underpinning or retaining wall	Fixed quote	Underpinning, temporary works and retaining structures

Figures are a guide only and exclude VAT. Larger, complex or high-value West London properties, including basements and listed buildings, are quoted individually. Most straightforward calculations are Building Control-ready within a few working days.

Local Coverage

Areas We Cover in West London

Our West London structural engineers work across every borough and neighbourhood, including:

Ealing & Hounslow

Ealing, Chiswick, Acton, Hanwell, Brentford, Isleworth and the surrounding Victorian and Edwardian terraces.

Hammersmith, Fulham & Kensington

Hammersmith, Fulham, Shepherd’s Bush, Kensington, Chelsea, Notting Hill and Earls Court.

Richmond, Brent & Hillingdon

Richmond, Twickenham, Wembley, Ruislip, Uxbridge and the surrounding West London suburbs.

We also cover Holland Park, Barnes, Kew, Hanwell and the wider West London area. See all the areas we serve.

Why LENIO

Chartered West London Structural Engineers You Can Trust

Chartered & Insured

Chartered engineers, members of ICE and CABE, with professional indemnity insurance on every project.

Checked by Two Engineers

Every design is independently checked before it is issued, for accuracy and full Building Regulations compliance.

Fixed Fees, Fast Turnaround

A clear fixed quote before we start and Building-Control-ready calculations, usually within a few working days.

Accreditation

Chartered, ICE & CABE Members

The Institution of Civil Engineers (ICE)

The Chartered Association of Building Engineers (CABE)

Client Reviews

What Our West London Clients Say

Trusted by homeowners, architects and developers across West London.

Good to Know

West London Structural Engineer FAQs

What does a structural engineer do?

A structural engineer designs and assesses the load-bearing parts of a building, such as the foundations, beams, columns, walls and roof, so it can safely carry its loads and stays stable. They produce the calculations and drawings needed to build new structures or safely alter existing ones, and diagnose problems like cracking and movement. In West London, LENIO provides both structural design and independent structural surveys.

How much does a structural engineer cost in West London?

Most residential work in West London runs from about £300 to £1,500 depending on scope. A single beam calculation or load-bearing wall removal starts from around £300, extension design is roughly £450 to £900, loft conversion calculations from about £550, and a structural survey or report from £600 to £1,500. Basements and listed buildings are quoted individually. We confirm a fixed fee in writing before any work begins.

Do I need a structural engineer or an architect?

They do different things. An architect designs the layout and appearance of your project, while a structural engineer designs the hidden structure that holds it up, the beams, foundations and load paths. Many West London projects need both: often you start with an architect’s drawings and then come to us for the structural design, calculations and Building Control pack.

Do I need a structural engineer for an extension or loft conversion in West London?

In almost all cases, yes. Extensions and loft conversions change how loads travel through your home, so a structural engineer designs the beams, foundations and supports and provides the calculations building control requires. This applies across West London’s Victorian and Edwardian terraces, mansion blocks and period conversions alike.

Do you design basements and Basement Impact Assessments in Kensington and Chelsea?

Yes. Basement excavations are common in Kensington, Chelsea and Notting Hill, and they need careful structural design of underpinning, retaining walls and the loads on neighbouring buildings. We provide the structural design and calculations and support the Basement Impact Assessment your borough requires, coordinating with your architect and party wall surveyor.

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

Yes. Removing a load-bearing wall or chimney breast redistributes the loads above it, so an engineer must design a suitable steel beam and supports. Building control needs the calculations before work starts. In West London terraces, where a beam bearing sits close to a party wall, the Party Wall etc. Act 1996 may also apply, and we will flag this at quote stage.

Can you reduce the steel size to save cost?

Often, yes. Through value engineering we can sometimes reduce steel weight or cost, for example by using two lighter beams instead of one, adding a column along a span, or adjusting the structural layout. The best option depends on your architecture and loads, so we discuss it with an open mind on each project, always keeping the design safe and compliant.

Are the cracks in my West London property serious?

Some cracks are cosmetic and some indicate structural movement or subsidence, which can affect period terraces on London clay. Width, location, direction and whether a crack is growing all matter. A structural survey lets a chartered engineer establish the cause and tell you clearly whether it is serious and what to do. We can often give initial guidance from photos before arranging a visit.

Can you provide retrospective calculations or a certificate of adequacy?

Yes. Where an extension or alteration in West London was built with no Building Control record, we carry out a retrospective assessment (regularisation) and produce a calculation pack for your solicitor, surveyor or lender. Once structural works are complete, we can also inspect and issue a certificate of adequacy, often needed for insurance or re-mortgaging.

Which West London boroughs and areas do you cover?

We cover the whole of West London, including Ealing, Hounslow, Hammersmith & Fulham, Kensington & Chelsea, Richmond, Brent and Hillingdon, and areas such as Chiswick, Acton, Shepherd’s Bush, Notting Hill, Earls Court, Twickenham and Wembley. Wherever your property is, you receive the same chartered-standard engineering.

Are your structural engineers chartered and insured?

Yes. LENIO is led by chartered engineers who are members of the Institution of Civil Engineers (ICE) and the Chartered Association of Building Engineers (CABE), and we carry professional indemnity insurance. Choosing a chartered, insured engineer with real West London experience gives you confidence the design is safe, compliant and buildable.

Speak to Structural Engineers in West London

Planning an extension or basement, or worried about cracks or a period facade? Get clear, practical advice and a fixed, no-obligation quote from LENIO Consultants’ chartered structural engineers in West London.

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