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Greater London & Surrounding Areas

Structural Engineer London

Looking for a structural engineer in London? We provide fixed-fee structural calculations from £245 for load bearing wall removals, RSJ beams, loft conversions, extensions and structural alterations across Greater London. Building Control-ready within 24 to 72 hours.

Based in Uxbridge in west London, we work across all 32 London boroughs. London's housing stock covers Victorian and Edwardian terraces, interwar semis, mansion blocks and new-build flats, each with different structural requirements. We know the differences and factor them into every calculation.

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We respond to London enquiries within 24 hours.

Fixed fee confirmed before we start. No obligation.

Structural Engineer London Cost Guide (2026)

Fixed-fee structural engineer London costs, confirmed in writing before we start. No hidden hourly rates.

ServiceTypical Fee (London, 2026)What Is Included
Load bearing wall removal / RSJ London£245 to £450Beam sizing, padstone design, masonry checks, Building Control drawing
Structural alterations London£300 to £900Chimney breasts, new openings, floor changes, party wall liaison
Rear or side extension London£450 to £750Foundations, masonry checks, steelwork, Building Control pack
Loft conversion structural calculations Londonfrom £550Ridge beam, floor joists, dormer supports, connections
Structural inspections London£350 to £650Cracks, subsidence, movement, pre-purchase assessment
Basement or retaining wall LondonFixed fee quoteUnderpinning, temporary works, retaining structures
All London fees exclude VAT. Complex layouts or site visits quoted individually. Full guide: structural engineer costs UK.
Load bearing wall removal London from £245. Most kitchen knock-throughs are delivered the next working day. See our full guide to wall removal costs for the complete project budget.

Load Bearing Wall Removal London

Load bearing wall removal is the most requested structural job across London's housing stock. Here is exactly what the process involves and what makes London properties different from the rest of the UK.

What the calculation covers

When a load bearing wall is removed, the loads above (floors, walls, roof) transfer to a steel beam (RSJ) and down through padstones to the masonry below. A structural engineer calculates the correct beam size, padstone dimensions and masonry bearing details. This full calculation pack goes to your London borough's Building Control before the builder can start. Starting from £245, delivered in 24 to 72 hours.

For a full breakdown of what this involves, see our complete guide to load bearing wall removal and our guide to wall removal costs.

What makes London wall removals different

Three things make London wall removals more complex than elsewhere. First, party walls: in terrace and semi-detached properties across London, the wall being removed often sits close to the party wall boundary. The Party Wall etc. Act 1996 applies when a beam bearing sits within 50mm of a party wall. We flag this at quoting stage so your party wall surveyor can be instructed before work starts.

Second, mansion block and purpose-built flat conversions: many London flats converted from mansion blocks have reinforced concrete or steel frame construction. Standard domestic beam calculations do not apply here. We identify the construction type from your drawings before quoting and advise if a different assessment is needed.

Third, London clay: shrink-swell movement in London clay is the most common cause of cracking in London homes. When a wall removal changes how load is distributed, a foundation that has already moved can be affected. We check this and design the padstone accordingly.

Structural Alterations West London

West London has one of the highest concentrations of Victorian and Edwardian terraces currently being altered for open-plan living. As a west London practice based in Uxbridge, structural alterations across W, UB, TW and outer west London postcodes are our core work.

Structural alterations in Ealing

Ealing has some of the most consistent Victorian and Edwardian terrace stock in west London, particularly in Acton, Hanwell and West Ealing. The most common structural alteration in Ealing properties is the ground-floor wall removal between the kitchen and the back reception room, creating an open kitchen-diner. These walls almost always carry the first-floor joists and in some properties a section of the chimney breast sits on or near the opening.

Ealing's Victorian terraces use solid brick construction throughout. Padstone sizing in solid brick differs from modern cavity walls, and the load path from upper floors to the foundations tends to be more direct. We check the full load path from roof to ground before specifying any beam in an Ealing property. Most Ealing wall removal and RSJ calculations are delivered within 48 hours. See our dedicated structural engineer Ealing page.

Structural alterations in Hammersmith, Hounslow and Hillingdon

Hammersmith and Fulham is one of the busiest boroughs for structural alterations in London. The concentration of Victorian terraces in Hammersmith, Shepherd's Bush, Parsons Green and Barons Court, combined with strong property values, drives a high volume of wall removal and chimney breast removal work. Chimney breast removals are particularly common here because so many Victorian terraces in this area have chimney breasts on both the front and rear elevations that homeowners want removed to maximise space.

Hounslow's housing mix spans Victorian terrace stock in Brentford and Isleworth through to interwar semis in Feltham and newer properties around Heston. Each construction era has different structural implications for wall removals. Hillingdon, which includes Uxbridge, Hayes and Northolt, has a strong market for rear extensions and loft conversions on the interwar and post-war semis that dominate the borough. All structural alterations west London work across these boroughs carries the same fixed fee and 24 to 72 hour turnaround.

Structural alterations west London: same fixed fee and turnaround for all W, UB, TW and outer west London postcodes. Based in Uxbridge, west London is our fastest response area. Structural alterations west London calculations start from £300.

Structural Engineer West London

Based in Uxbridge, we are the structural engineer west London homeowners and builders rely on for fixed-fee calculations across all west London boroughs.

Ealing & Hounslow

Wall removals, loft conversions and rear extensions in Acton, Hanwell, Southall, Chiswick, Brentford and Isleworth. Victorian and Edwardian terraces predominate. Same-day quotes for most Ealing and Hounslow projects.

Hammersmith & Fulham

Open-plan kitchen conversions and chimney breast removals in Hammersmith, Shepherd's Bush, Parsons Green and Barons Court. Party wall implications checked at quoting stage. From £245.

Hillingdon & Uxbridge

Our base area: all Hillingdon, Uxbridge, Hayes, Northolt, Ruislip and West Drayton projects. Same-day quotes and 24-hour turnarounds as standard for UB postcodes.

Kensington & Chelsea

Basement extensions, structural alterations in listed buildings and RSJ designs for period properties in Notting Hill, Holland Park and Kensington. Complex jobs quoted after drawings are reviewed.

Structural Alterations North London

North London boroughs, from Camden and Islington through to Barnet, Haringey and Enfield, have dense Victorian and Edwardian terrace and semi-detached stock with high demand for structural alterations. Here is what the work typically involves in north London properties.

Camden, Islington and Hackney

The inner north London boroughs have some of the most active structural alteration markets in London. Victorian and Georgian terrace stock in Islington, Camden and parts of Hackney is frequently being opened up, with wall removals between the ground-floor reception rooms being the most common instruction. The Georgian townhouses in Islington add an additional complexity: they are often on London clay with deeper foundations that were designed before the party wall or Building Regulations frameworks existed, and the load paths in these buildings need careful tracing before any alteration begins.

A significant proportion of alterations in these boroughs involve properties that have already been converted into flats. When the property is split between multiple owners or tenants, the freeholder's consent is required before structural work begins, and the structural calculation pack needs to be clear about which parts of the structure are affected. We identify this from your drawings and title information before starting any north London alteration job.

Barnet, Haringey and Enfield

The outer north London boroughs have a mix of late Victorian and Edwardian terraces in areas like Tottenham, Wood Green and Finchley, alongside 1930s and post-war semis and detached properties in Barnet, Enfield and the more suburban parts of Haringey. This mix means that structural alteration instructions in north London span the full range of domestic construction types.

The 1930s semis that dominate much of outer north London are a particularly active market for rear extensions and loft conversions. These properties typically have traditional cut roofs with enough headroom for a usable loft room, and their rear gardens are long enough to accommodate a 4 to 5 metre rear extension without triggering permitted development limits. We handle all structural alteration work across north London boroughs at the same fixed fee with 24 to 72 hour turnaround. Structural alterations north London calculations start from £300.

Structural Alterations South and East London

South and east London boroughs have a diverse mix of housing stock with different structural profiles, from Victorian terraces in Lewisham and Peckham through to interwar semis in Merton and Wandsworth, and post-war estates across Newham and Tower Hamlets.

Structural engineer Lewisham and south east London

Lewisham has extensive Victorian terrace stock across New Cross, Brockley, Honor Oak and Forest Hill, and significant Edwardian and interwar housing in Lee and Grove Park. Wall removals and rear extensions are the most common structural alteration instructions we receive from Lewisham homeowners. The Victorian terraces in Brockley and New Cross are particularly active, with kitchen knock-throughs and chimney breast removals being the dominant project types.

One specific consideration in parts of Lewisham and the south east London boroughs is that many properties sit on London clay overlain by Thames gravel deposits in the lower-lying areas near the river. Foundation depths and ground conditions can vary significantly within a short distance. We note the postcode and advise when this is likely to affect the foundation specification before confirming the scope of any alteration calculation.

We also cover Greenwich, Southwark, Bromley and all other south east London boroughs at the same fixed fee. Structural alteration calculations for south east London start from £300.

Wandsworth, Lambeth and south west London

Wandsworth and Lambeth contain some of the most active structural alteration markets in south London. Battersea, Clapham, Balham and Tooting all have large areas of Victorian and Edwardian terrace and semi-detached housing where open-plan conversions and rear extensions are constant activity. Properties in Clapham and Battersea frequently have very large rear kitchen extensions already in place from the 1980s or 1990s, where the original extension beam has no Building Control record. A retrospective structural assessment and calculation pack for these is a common enquiry we handle for Wandsworth and Lambeth homeowners and their solicitors or mortgage lenders.

East London boroughs, including Hackney, Tower Hamlets, Newham and Waltham Forest, have a mix of Victorian terraces in the older areas and significant post-war estate and new-build development. Structural alterations in post-war estate housing require careful construction type identification from photos before any beam or padstone specification is confirmed, as these properties do not follow the standard Victorian terrace structural logic.

Structural Engineering Services London

Fixed-fee residential structural engineering across all 32 London boroughs: RSJ beams, loft conversions, extensions, basement work and structural reports.

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RSJ Beams & Wall Removal London

Steel beam calculations for kitchen knock-throughs, through-lounges and rear openings from £245. Beam sizing, padstones and a full Building Control pack for your London borough. Wall removal guide

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Loft Conversions London

Ridge beams, floor joists and dormer framing from £550. London's Victorian terrace stock has compact roof spaces, and we design the structural upgrade to maximise usable headroom while meeting Building Control requirements. Loft conversion guide

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Extensions London

Rear and side extension packs from £450. London's terrace properties often have tight plots and shared boundaries, and we design practical structures that maximise usable space within planning constraints. Extension guide

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Basements & Retaining Walls

Basement extensions, underpinning and retaining wall design for London properties. London's varied ground conditions (London clay, gravel terraces, made ground) require site-specific foundation assessment. Fixed fee quoted after initial drawings are reviewed.

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Structural Reports London

Pre-purchase structural reports, crack assessments and subsidence investigations from £350. London clay shrink-swell movement is one of the most common causes of cracking in London homes, and we distinguish cosmetic from structural. Report guide

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Building Control Compliance

Every calculation pack is Building Control-ready for your London borough. We work with all 32 councils and private approved inspectors. Inspector queries answered at no extra charge. Professional Indemnity Insurance held throughout.

Coverage Across Greater London

We provide structural calculations for all 32 London boroughs at the same fixed fee and turnaround.

West London

Ealing, Hounslow, Hammersmith, Hillingdon, Kensington & Chelsea, Richmond. Our home area: fastest turnaround for W, UB and TW postcodes.

North London

Barnet, Haringey, Enfield, Camden, Islington, Hackney. Victorian and Edwardian terrace stock with active loft and extension demand.

South London

Wandsworth, Lambeth, Merton, Croydon, Kingston. Interwar semis and Victorian terraces. Rear extensions and through-lounges are the most common instruction.

East & SE London

Hackney, Tower Hamlets, Newham, Greenwich, Lewisham, Southwark, Bromley. Victorian terraces, post-war estates and new-build developments.

How It Works

A straightforward four-step process from enquiry to Building Control submission.

1

Send drawings and photos

Plans, a sketch or photos with your London postcode. We identify the construction type and confirm the scope.

2

Fixed fee confirmed

Clear fixed price in writing before any work begins. Same-day quotes for most London residential projects.

3

Calculations delivered

Beam sizing, padstones and connection details in a PDF pack for your London borough Building Control and builder. 24 to 72 hours.

4

Build support

If Building Control or your builder has queries, we respond directly. Inspector queries are included in the fixed fee.

What London Clients Say

Recent feedback from homeowners and builders across Greater London.

★★★★★

"SECalcs explained everything in plain English and turned our extension calculations around in two days. Building Control asked one question which they handled the same day."

Amelia W, Wandsworth

★★★★★

"Needed an RSJ for a through-lounge wall removal in our Ealing terrace. Checked the foundations, sized the steel, provided padstone details. Building Control passed it first time."

Priya S, Ealing

★★★★★

"Wall removal calculations delivered within 48 hours and Building Control approved them without any questions. Very professional."

Sarah K, Hammersmith

London Boroughs We Cover

We provide structural calculations London-wide across all 32 boroughs. For projects outside London, see our nearest city pages below.

●Ealing ●Hounslow ●Hillingdon ●Hammersmith & Fulham ●Kensington & Chelsea ●Richmond ●Barnet ●Haringey ●Enfield ●Camden ●Islington ●Hackney ●Wandsworth ●Lambeth ●Merton ●Croydon ●Greenwich ●Lewisham ●Southwark ●Tower Hamlets ●Newham ●Bromley ●All London postcodes ●Brighton & Hove

For projects in Brighton and Hove, see our dedicated Brighton structural engineer page.

FAQs: Structural Engineer London

Straight answers for London homeowners, landlords and builders.

How much does a structural engineer cost in London?

Structural engineer London costs run from £245 to £1,500 for residential work. Load bearing wall removal and RSJ beams start from £245. Structural alterations are £300 to £900. Loft conversion structural calculations start from £550. Extension structural design is £450 to £750. Structural inspections are £350 to £650. All fees are fixed and confirmed before work begins. Full guide: structural engineer costs UK.

What structural alterations west London do you handle?

Structural alterations west London covers load bearing wall removals, chimney breast removals, new openings, loft conversions and extensions across Ealing, Hounslow, Hammersmith, Hillingdon, Kensington and all W, UB and TW postcodes. Based in Uxbridge, west London is our core area. Structural alterations west London calculations start from £300 with 24 to 72 hour turnaround.

Do you cover Ealing as a structural engineer?

Yes. Ealing is one of our most active areas. We handle wall removals, RSJ beam calculations, loft conversions and extensions across all Ealing postcodes including Acton, Hanwell, Southall, Greenford and West Ealing. Most Ealing residential calculations are ready within 24 to 72 hours. See our structural engineer Ealing page.

What is load bearing wall removal in London?

Load bearing wall removal London means removing a structural wall and installing a steel beam (RSJ) to carry the loads above. London Building Control requires full structural calculations before approving this work. We calculate the beam size, padstone design and bearing details and produce a Building Control-ready pack. Load bearing wall removal London starts from £245 and is usually delivered in 24 to 72 hours. Full wall removal guide.

Do you cover all London boroughs including north and south London?

Yes. We cover all 32 London boroughs including structural alterations north London across Camden, Islington, Barnet, Haringey and Enfield, and south London across Wandsworth, Lewisham, Greenwich and Southwark. Based in Uxbridge, we are strongest in west and north west London but we work across all London postcodes at the same fixed fee. Most projects are handled remotely from drawings and photos.

Do you work with London Building Control?

Yes. We produce calculation packs in the format all 32 London borough Building Controls expect. We also work with private approved inspectors across London. If Building Control raises queries, we respond directly at no extra charge.

How fast can you deliver structural calculations in London?

RSJ beams and wall removal calculations are ready in 24 to 72 hours. Loft conversions and extensions take 5 to 7 working days. Turnaround is confirmed in writing with your fixed fee quote.

How do I choose a structural engineer in London?

Look for a Chartered professional with Professional Indemnity Insurance and specific experience with London housing stock. Victorian terraces, mansion blocks and post-war construction are structurally different. A reputable structural engineer in London provides fixed-fee quotes and Building Control-ready drawings, and responds to inspector queries as part of the service. London borough Building Controls are known for thorough review processes so experience with the specific borough matters.

Get a Quote from a Structural Engineer London

Fill in the form below. Fixed fees, 24 to 72 hour turnaround, Building Control-ready calculations every time.

We aim to respond to all London enquiries within one working day.

Phone
07359 267907
Email
info@structuralengineercalcs.com
Based
Uxbridge, West London, UB8 3DE
Response Time
Within one working day
Service Area
All 32 London boroughs and Greater London. Strongest coverage in west and north west London, covering W, UB, TW, HA and NW postcodes.
Most London projects are designed from drawings and photos. If a site visit is needed, for example to assess construction type in an unusual property. We explain this and add it to the fixed quote upfront.
Get Started with a Structural Engineer London Today

Fixed fees, fast turnaround and Building Control-ready calculations every time. Call us on 07359 267907 or fill in the quote form above.

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SECalcs Structural Engineers, based in Uxbridge, west London. Serving all London boroughs and Greater London.

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  • Head Office: Corwell Lane, Uxbridge, England, UB8 3DE.
  • 07359 267907
  • info@structuralengineercalcs.com
  • Company No: 12653163
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