RSJ & Wall Removal Northampton
Steel beam calculations for kitchen knock-throughs, through-lounges and rear openings across Northampton from £245. We check load paths, size the steel, design padstones and produce a full Building Control-ready pack.
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Northampton & Northamptonshire
Structural Engineer Northampton
Looking for a structural engineer Northampton homeowners and builders trust? We provide fixed-fee structural calculations from £245 for structural alterations, wall removals, loft conversions, extensions and RSJ beam design across Northampton and Northamptonshire. Building Control-ready within 24 to 72 hours.
We know Northampton's housing stock — Victorian and Edwardian terraces in St James and Abington, post-war semis in Kingsthorpe and Duston, and the ironstone and clay geology that affects older foundations across the county.
Get a Quote
We respond to Northampton enquiries within 24 hours.
Structural Engineer Northampton: Fees and Costs (2026)
Most structural engineering jobs in Northampton cost between £245 and £1,500. All fees are fixed and confirmed in writing before we start.
| Service | Typical Fee (Northampton, 2026) | What Is Included |
|---|---|---|
| Single RSJ beam calculation | £245 to £450 | Beam sizing, padstone design, masonry checks |
| Load bearing wall removal (engineer fee) | £300 to £600 | Full Building Control calculation pack |
| Structural alterations Northampton | £300 to £900 | Chimney breasts, new openings, floor alterations |
| Loft conversion structural design | £395 to £1,200 | Floor joists, ridge beam, dormer supports |
| Home extension structural calculations | £600 to £1,500 | Beams, foundations, roof structure |
| Structural inspection and defect report | £400 to £900 | Cracks, subsidence, pre-purchase reports |
Load bearing wall removal in Northampton from £300. Most kitchen knock-throughs are turned around the next working day. See our full guide to wall removal costs for the complete project budget including builder and steel.
Structural Engineer Northampton Services
We cover all common residential structural engineering across Northampton and Northamptonshire — from a single RSJ to a full extension or loft pack.
Structural Alterations Northampton
Calculations for any work that changes how your property carries load — chimney breast removals, new openings, floor alterations, raising roof heights. Northampton Building Control require a full structural pack for all of these. From £300.
Loft Conversions Northampton
Ridge beams, floor joists and dormer framing from £395 for loft conversions across Northampton and Northamptonshire. We design the structural upgrade and prepare a full Building Control pack. See our loft conversion guide.
Extensions Northampton
Full structural packs for single and double-storey extensions from £600, including steel beams, posts, padstones and foundations. Northampton Sand ironstone and clay ground conditions are factored into every foundation design. See our extension guide.
Structural Calculations Northampton
All structural calculations are produced to Eurocodes and British Standards. Your pack includes beam sizing, padstone checks, connection details and deflection calculations — formatted for West Northamptonshire Council, North Northamptonshire Council and private approved inspectors. Inspector queries answered at no extra charge.
Structural Reports Northampton
Structural inspection and defect reports from £400 for cracks, settlement and pre-purchase assessments. Northampton's mix of ironstone and clay geology can cause differential settlement in older properties — we identify whether problems are cosmetic or structural. See our structural report guide.
Structural Alterations Northampton
Structural alterations is the term Northampton Building Control uses for any work that modifies the load-bearing structure of your home — wall removals, new openings, chimney breast removals, floor changes and more. All require a structural engineer's calculation pack before Building Control will approve the work.
Common structural alterations in Northampton
The most frequent structural alterations Northampton homeowners commission are kitchen knock-throughs — removing the wall between the kitchen and dining room to create an open-plan family space. This is especially popular in the interwar semis across Abington, Kingsthorpe and Weston Favell, and in the post-war terraces across Semilong and St James. The wall in these properties almost always carries the floor above, which means a properly specified RSJ beam is required before Building Control will approve the work.
We also handle chimney breast removals, new window openings in load-bearing side walls, internal door enlargements that break into structural masonry, and floor alterations where sections of intermediate floor are removed. Each needs its own load calculation — there is no shortcut that covers all of them.
Northampton housing stock and what it means structurally
Northampton has a broad mix of construction types that affect how structural alteration calculations are written. Victorian terraces around the town centre and in Far Cotton use solid one-brick walls with lime mortar — the bearing capacity is lower than modern masonry and padstone sizing needs to reflect that. 1930s to 1960s semis across Abington and Kingsthorpe use cavity wall construction with different bonding patterns. Post-war and 1970s properties in Duston and Rectory Farm sometimes used lightweight concrete blocks in internal walls — these need specific padstone design if a beam is being landed on them.
We identify the construction type from your photos and any available drawings before confirming the fixed fee, so the calculation reflects your actual building rather than a generic assumption. Structural alterations Northampton calculations start from £300, including full beam sizing, padstone specification and a Building Control-ready PDF pack.
Northamptonshire coverage. We cover Northampton town and the surrounding county — Wellingborough, Kettering, Corby, Daventry, Towcester, Brackley and the villages across Northamptonshire. Most structural alterations are handled remotely from drawings and photos with no site visit required.
Structural Engineer Northamptonshire
As a structural engineer Northamptonshire practice, we cover the full county — not just Northampton town. Same fixed fees and turnaround throughout.
County-wide coverage
We cover Northampton, Kettering, Wellingborough, Corby, Rushden, Daventry, Towcester, Brackley, Oundle, Higham Ferrers and all surrounding villages. The same fixed fee and turnaround regardless of where in the county your project is.
West and North Northamptonshire
We work with West Northamptonshire Council and North Northamptonshire Council Building Control, as well as private approved inspectors across the county. Calculations are formatted for local inspector expectations and we respond to queries directly at no extra charge.
Remote service, no extra charge
All work is done remotely from your drawings and photos — no site visit needed for most projects. There is no extra charge for projects outside Northampton town. A wall removal in Corby costs the same to calculate as one in central Northampton.
24 to 72 hour turnaround
RSJ and wall removal calculations are ready in 24 to 72 hours. Structural alteration projects take 3 to 5 working days. Loft conversions and extensions take 5 to 7 working days. Turnaround confirmed in writing with your fixed fee.
How It Works
A straightforward four-step process for wall removals, structural alterations, lofts and extensions anywhere in Northamptonshire.
1
Send plans and photos
Architect drawings, estate agent plans or a sketch with dimensions. Photos of the existing space. Anything is fine to start.
2
Fixed fee confirmed
We respond with a clear fixed price in writing before any work begins. No hourly rates or hidden extras.
3
Calculations delivered
We design beams, padstones and connections, and prepare a PDF pack for Building Control and your builder within 24 to 72 hours.
4
Build support
If Building Control or your builder has queries, we respond directly. Small adjustments are included in the fee.
What Northampton Clients Say
Recent feedback from homeowners and builders across Northampton and Northamptonshire.
★★★★★
"Quick, professional and explained the technical bits clearly. Our builder had the steel specs he needed immediately and Building Control had no queries."
Jason T, Kingsthorpe, RSJ for kitchen
★★★★★
"Great service for our loft conversion in Duston. The engineer turned the plans around fast and the price was exactly as quoted."
Emma W, Duston, Loft conversion
★★★★★
"Highly recommended. They dealt with a query from the inspector without charging us extra. Very helpful throughout the whole process."
Paul S, Weston Favell, Extension
Areas We Cover Near Northampton
We handle projects throughout Northampton and the wider county. Most work is done remotely from plans and photos.
●Northampton
●Kettering
●Wellingborough
●Corby
●Rushden
●Daventry
●Towcester
●Market Harborough
●Milton Keynes (North)
●Oundle
●Brackley
●Higham Ferrers
●Irthlingborough
●Long Buckby
●Brixworth
●All NN postcodes
FAQs: Structural Engineer Northampton
Straight answers for Northampton homeowners, builders and developers.
How much does a structural engineer cost in Northampton?
Most residential structural engineering jobs in Northampton cost between £245 and £1,500. A single RSJ beam calculation starts from £245. A load bearing wall removal is £300 to £600. Structural alterations start from £300. A loft conversion structural design is £395 to £1,200. A home extension is £600 to £1,500. All fees are fixed and confirmed in writing before work begins. Full guide: structural engineer costs.
What are structural alterations and do I need a structural engineer in Northampton?
Structural alterations include any work that changes how your property carries load — removing a wall, creating a new opening, removing a chimney breast, raising a roof, or altering floor structure. Northampton Building Control require a structural engineer's calculation pack before approving any of these works. Our structural alteration calculations start from £300. See our guide to load bearing wall removals.
Do you need to come to the property in Northampton?
Not always. For standard RSJ beams and extensions, good photos and plans are usually sufficient for us to produce the full calculation pack. If a site visit is necessary, we tell you before quoting and include it in the fixed fee. Most Northampton residential projects are completed remotely from drawings, which keeps costs lower.
Are your calculations valid for Building Control in Northamptonshire?
Yes. We work to British Standards and Eurocodes and produce professional calculation packs designed for submission to Northampton Building Control, West Northamptonshire Council, North Northamptonshire Council and any private approved inspectors in the county. The pack includes all beam sizing, padstone details and connection specifications your builder needs.
Do you cover all of Northamptonshire?
Yes. We cover the whole county including Northampton, Kettering, Wellingborough, Corby, Rushden, Daventry, Towcester, Brackley, Oundle, Higham Ferrers, Irthlingborough, Long Buckby and Brixworth. We also cover border areas towards Milton Keynes and Market Harborough. Send your postcode and we will confirm the same day.
How long does a structural engineer take in Northampton?
RSJ and wall removal calculations are ready in 24 to 72 hours. Structural alteration projects take 3 to 5 working days. Loft conversions and extensions take 5 to 7 working days. We confirm the turnaround in writing when we give your fixed fee.
What information do I need to send for a Northampton quote?
Your property address and postcode, plans or a simple sketch with dimensions, clear photos of the wall or area, and any existing architect drawings. For loft conversions or extensions, roof section details are helpful. Send them via the quote form on this page or email info@structuralengineercalcs.com.
What structural issues are common in Northampton properties?
The most common structural issues in Northampton homes are lintel failure in Victorian and Edwardian terraces in St James and Abington, cracking caused by clay soil shrinkage in dry summers across the county, and floor joist problems in post-war semis. Northampton's geology — with its mix of Northampton Sand ironstone and Lias clay — can cause differential settlement in older properties. We account for local soil conditions in every foundation and extension design.
Get a Quote from a Structural Engineer Northampton
Fill in the form below. Your details go directly to an engineer for review.
Phone
Email
Response Time
Within one working day for most enquiries
Service Area
Northampton, Kettering, Wellingborough, Corby, Rushden, Daventry, Towcester, Oundle, Brackley, Higham Ferrers, Market Harborough and surrounding Northamptonshire.
Many Northampton projects are designed from drawings, photos and measurements. If a visit is needed we explain this and add it to the quote.
Start your Northampton structural project today
Fixed fees, fast turnaround and Building Control-ready calculations every time. Call us on 07359 267907 or fill in the quote form above and we will come back to you the same working day.
- Head Office: Corwell Lane, Uxbridge, England, UB8 3DE.
- 07359 267907
- info@structuralengineercalcs.com
- Company No: 12653163