Removing a load-bearing wall is one of the most transformative things you can do to a house, and one of the most technically demanding. Get it right and you gain a light, open-plan space; get it wrong and you can cause serious structural damage, receive a building control notice requiring the work to be taken down or put right, and make the property hard to sell or remortgage.1 This guide walks through the full process as structural engineers see it: from confirming whether the wall is load-bearing, through sizing the steel, to the day of installation and the building control sign-off.

Is the Wall Actually Load-Bearing?

Not every wall that runs parallel to the ridge is carrying loads, and not every partition is purely decorative. The only person qualified to give you a definitive answer is a structural engineer, not a builder, not an estate agent, and not a YouTube channel.

That said, there are indicators that suggest a wall is likely load-bearing:

  • It runs perpendicular to the floor joists (the most reliable on-site check)
  • It sits on or near the centre-line of the building, particularly in Victorian and Edwardian terraces where a spine wall divides front and rear rooms
  • It is solid masonry, brick or block rather than a hollow timber stud partition (though in older houses stud partitions can be load-bearing too)
  • There is another wall or column directly below it on the floor beneath
  • Structural drawings (from the original build or a previous alteration) indicate it as a structural element

If your house has a trussed-rafter roof (common in houses built since the late 1960s), the roof loads may be carried to the external walls only, meaning the internal spine wall is non-structural. But this must be confirmed by an engineer, never assume.

The Structural Engineer’s Role

Before any work starts, appoint a structural engineer (not a draughtsman, not an architect alone) to:

  1. Visit the property, inspect the wall, and assess the loads it carries
  2. Calculate the appropriate steel beam (RSJ) section to span the opening
  3. Produce structural drawings and calculations for building control
  4. Specify the padstone size and bearing length at each end of the beam
  5. Inspect the completed installation (usually one site visit for the steel placement) and confirm it to building control, which issues the completion certificate

Structural engineer fees for a load-bearing wall removal vary with what is included: HomeOwners Alliance puts calculations for an RSJ at £60–£950 in 2026.2 For a straightforward single-beam job, a fixed fee covering the calculations and drawings for building control typically runs £400–£800; a cheaper desk-based calculation may not include a site visit, so clarify at the outset.3

Sizing the RSJ

An RSJ (strictly a Rolled Steel Joist, an older taper-flange section; the beam used today is almost always a parallel-flange Universal Beam, but RSJ is the term that stuck) spans the opening left when the wall is removed.4 The engineer sizes it based on:

  • Span, the clear distance between supports
  • Load, what is bearing down: floor loads, roof loads, any walls above
  • Bearing length, how much wall remains either side to seat the beam on (at least 150 mm is typical, the bearing Approved Document A assumes for lintels)5

For a typical ground-floor through-room in a two-storey Victorian terrace (3.5–4.5 m clear span, carrying one floor and roof), an engineer will commonly specify a 203 × 102 Universal Beam or 203 × 133 Universal Beam, beams roughly 200 mm deep.6 Larger spans or greater loads require deeper sections.

Clear spanTypical beam sectionApproximate steel supply cost
Up to 2.5 m152 × 89 or 178 × 102 UB£180–£300
2.5–4.0 m203 × 102 or 203 × 133 UB£280–£500
4.0–6.0 m254 × 102 or 254 × 146 UB£450–£900
Over 6.0 m305 × 102 or deeper, engineer-specific£700–£1,600+

Note: steel prices fluctuate. The above are 2026 UK supply prices for standard sections. Installation is separate.

Padstones

At each end of the beam, the load is transferred into the masonry through a padstone, a concrete or engineering-brick block that distributes the concentrated point load without crushing the brickwork. Padstone size depends on the load and the masonry, so the engineer will specify it; precast concrete padstones sized to brick or block coursing are common. Their cost is modest (Selco lists a 440 × 215 × 102 mm concrete padstone at £30.50 before VAT), but their correct installation is critical.7

Party walls

In a terrace or semi-detached house, one or both ends of the beam often bear into the party wall. Cutting into a party structure is work covered by section 2 of the Party Wall etc. Act 1996.8 A party structure notice must be served on the neighbour at least two months before that work begins.9

Building Control Sign-Off

Removing a load-bearing wall is building work under the Building Regulations 2010 (England): a material alteration to the structure that needs building regulations approval.1011 This means you must notify your local authority building control (LABC) or a registered building control approver before work starts.12 Permitted development rights are a planning concept and do not exempt structural alterations from the Building Regulations.

You have two routes:

  1. Full Plans application, submit drawings and calculations before work starts; building control approves in writing.13 Recommended for any project with a bank or mortgage, or where you need certainty before committing costs.
  2. Building Notice, notify building control before you start but do not submit drawings. An inspector visits on site instead.14 Simpler but less formal; lenders sometimes prefer full plans.

Building control fees for a single RSJ installation typically run £300–£600 depending on the council: Hillingdon, for example, charges £396 including VAT for forming a structural opening such as a simple through lounge.15 Work with the structural engineer to submit calculations together.

On completion, building control will issue a completion certificate.16 This document is essential for resale and remortgage. Do not proceed without it.

The Build Process: Step by Step

Stage 1 – Preparation (day 1)

Temporary support to the structure above must be erected before the wall is touched. This is typically done with Acrow props and needles, steel or timber beams (needles) that pass through the wall at regular intervals (often around 900 mm to 1 m apart, as the engineer specifies) and bear on props either side. The needles go through the wall just above where the new beam will sit. This temporary support is as important as the permanent steel; never let a builder remove wall material without props in place.

Stage 2 – Removing the wall

Once propped, the masonry or stud is carefully removed section by section. Any buried services (gas pipes, electrical cables, water pipes) must be identified from plans or detection before demolition begins.

Stage 3 – Padstone installation

The masonry at each end of the opening is prepared and the padstones bedded in. These must be fully cured before the beam is lowered.

Stage 4 – Steel installation

The RSJ is craned or manually lifted into position and seated on the padstones. Heavier beams are lifted with a chain block, beam lifter or small crane rather than by hand, often through a window or from a scaffold. For scale, a 203 × 133 × 25 UB weighs 25.1 kg per metre, so a 4 m length is about 100 kg.6 The engineer inspects the seating at this stage.

Stage 5 – Making good

The beam is plastered over (usually a metal lath and plaster box), the floor is made good, and any services are reinstated. Decorating follows.

Typical programme

Most load-bearing wall removals on a standard terraced or semi-detached house can be completed within 3–5 days of on-site build work, not counting the time for structural engineer appointment, building control submission, and drying.

Cost Breakdown

ItemLowTypicalHigh
Structural engineer (calcs + drawings)£400£600£800
Building control fee£300£350£600
Steel beam (supply only)£200£400£900
Labour (propping, removal, installation)£800£1,200£2,000
Padstones and materials£80£150£300
Making good (plaster, floor, decoration)£500£900£1,500
Total£2,280£3,600£6,100

Prices above are 2026 estimates for England, excluding VAT. Labour usually costs more in London and the South East. Complex situations, multiple beams, deep floors, large spans, or properties with no vehicle access, will push costs higher.

Does It Need Planning Permission?

No, generally. Internal structural alterations do not require planning permission.17 Building Regulations approval is required, but that is a separate regime. The main exception is a listed building: listed building consent is needed for any significant works, internal or external, and that includes taking out a structural wall.17 A planning condition that specifically controls internal alterations would also apply. Always check your listing status and any previous planning permissions.

Open-Plan Living: Is It Worth It?

Structurally, the answer is almost always yes, provided the beam is sized and installed correctly. A well-executed wall removal transforms the feel of a house, improves natural light penetration, and can add to a home’s appeal where open-plan living is in demand. The main caveats are thermal: removing the wall between a heated rear kitchen-diner and a front living room can increase heating bills if the resulting space is large and poorly draught-sealed. Consider underfloor heating or column radiators if you are combining two poorly insulated rooms.

The rules in this note are those that apply in England. Scotland, Wales and Northern Ireland have their own building standards and permitted development rights.

References (17)

Figures in this note were checked against the sources below on 2 October 2026. Superscript numbers in the text point to them. Every source the site cites, by topic.

  1. 1technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-NKK4KZSection 36(1) lets the building control authority, without prejudice to prosecuting for a fine, serve notice on the owner requiring work that contravenes building regulations to be pulled down or removed, or at the owner's election altered so as to comply. Section 36(2) applies the same power where work was executed without an application for building control approval, despite refusal of one, or otherwise than in accordance with the requirements of a granted application. Section 36(3) gives the owner 28 days, or longer if the appropriate court or tribunal allows, before the authority may carry out the work itself and recover the reasonable expenses. Section 36(4) is the key protection: a section 36 notice may not be given after 10 years from the date the work was completed. Sections 36(5) and 36(5A) bar a section 36 notice where a building control approval application for work that is not higher-risk building work was granted and the work was executed in accordance with the approved plans and any requirement imposed.
  2. 2technicalfairHomeOwners Alliance, guidance.RN-6O3Y7XHomeOwners Alliance on structural engineer costs in 2026, around £100 an hour, with typical fees for common jobs: calculations for a beam over a knocked-through wall, an extension design, a structural survey. A consumer body's figures, so treat the hourly rate as indicative and the list of what needs an engineer at all as the useful part.
  3. 3costsupplier figureSimplify Structures.RN-PKT6F3A price, true at 2026-09. Simplify Structures publishing its own price guidance for this work. A trade supplier writing about what it charges is evidence of the market rate and not a quotation, and the cost book treats it as one figure among several rather than on its own
  4. 4technicalgoodSCI and BCSA (SteelConstruction.info), guidance.RN-JNHOYTThe SCI 'Blue Book' design data covers universal beams, universal columns and joists to BS 4-1, and notes that joists have tapered flanges.
  5. 5technicalvery strongMinistry of Housing, Communities and Local Government (GOV.UK).RN-Z6AXUWThe full Approved Document A PDF, which carries the deemed-to-satisfy tables a domestic project is checked against. Section 2E covers foundations of plain concrete: paragraph 2E3 gives the recommended minimum widths of strip foundations in Table 10, keyed to ground type and total load of loadbearing walling per linear metre. Table 10 sets, for rock (not inferior to sandstone, limestone or firm chalk, requiring at least a pneumatic or mechanically operated pick to excavate), a width equal to the width of the wall at every load. For medium dense gravel or sand (requires a pick to excavate, a 50mm square wooden peg hard to drive beyond 150mm) and for stiff clay or stiff sandy clay (can be indented slightly by the thumb), the minimum widths are 250mm at 20 kN per linear metre, 300mm at 30, 400mm at 40, 500mm at 50, 600mm at 60 and 650mm at 70. Firm clay and firm sandy clay (thumb makes an impression easily) start at 300mm. The document also covers minimum depth of strip foundations, wall thickness rules for residential buildings up to three storeys (paragraph 2C10 covers internal loadbearing walls in brickwork or blockwork), buttressing, lateral support by floors and at roof level, interruption of lateral support, wall cladding in Section 3, and Section 5 on reducing sensitivity to disproportionate collapse with the building consequence classes.
  6. 6technicalgoodBritish Steel, a data sheet.RN-OILQW6The universal beam data sheet from British Steel, the only UK manufacturer of structural sections: every UB size with its serial size, mass per metre, depth, width, web and flange thickness and root radius. This is where a beam designation like 203 x 133 x 25 is decoded into actual dimensions and weight, which is what decides whether it fits in a floor zone and whether it can be carried in by hand.
  7. 7costsupplier figureSelco Builders Warehouse.RN-1FFJDHA price, true at 2026-09. A builders' merchant product page for a single 440 x 215 x 102 mm precast concrete padstone, priced at £30.50 excluding VAT (£36.60 including VAT).
  8. 8technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-WKDENHSection 2(2) lists the building owner's rights over a party structure: (a) underpin, thicken or raise; (b) make good, repair or rebuild a defective party structure; (c) to (e) demolish and rebuild non-conforming partitions, connected buildings and party structures of insufficient strength or height; (f) to cut into a party structure for any purpose, which may include inserting a damp proof course; (g) to cut away a footing, projecting chimney breast, jamb, flue or other projection to enable a wall to be built; (h) to cut away overhanging parts of an adjoining building; (j) insert flashings; (k) execute incidental works; (l) raise or rebuild a party fence wall; (m) reduce wall heights; (n) expose a previously enclosed party wall. Paragraph (f) is the one that catches chasing or breaking through a shared wall for pipework, which makes it party wall work requiring a party structure notice.
  9. 9technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-C6XFB7A party structure notice must be served at least two months before the date on which the proposed work will begin, and must state the building owner's name and address, the nature and particulars of the proposed work (with plans, sections and load particulars where special foundations are proposed) and the date the work will begin. The notice ceases to have effect if the work has not begun within twelve months of service or is not then prosecuted with due diligence. Two months for a party structure notice against one month for a section 6 excavation notice is the distinction to cite.
  10. 10technicalvery strongThe National Archives, legislation.RN-ZCMRHVRegulation 3 of the Building Regulations 2010, the meaning of building work. Lists what counts: erecting or extending a building, providing or extending a controlled service or fitting, material alteration, work required by a material change of use, and inserting insulation into a cavity wall. If a job is not on this list it is not building work, so this is the first place to check whether approval is needed at all.
  11. 11technicalvery strongPlanning Portal, guidance.RN-BAZDDMThe Planning Portal's answer on moving an internal load-bearing wall: planning permission is generally not needed for internal alterations, but building regulations approval is, and the wall's structural role is exactly why. The clean statement of the distinction people get wrong, that no planning permission does not mean no approval needed.
  12. 12technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-37ODVXRegulation 12(1) applies to anyone intending to carry out building work, replace or renovate a thermal element, change a building's energy status or make a material change of use. Regulation 12(2) requires that person to give the relevant authority either a building notice under regulation 13 or an application for building control approval with full plans under regulation 14. Full plans are compulsory where the Regulatory Reform (Fire Safety) Order 2005 applies (12(3)), where the building fronts onto a private street (12(4)) and where paragraph H4 of Schedule 1 applies (12(5)). Regulation 12(6) exempts work done by a competent person listed in Schedule 3, work listed in Schedule 4, and work inspected by a Schedule 3A third party certifier appointed before work starts. Regulation 12(6A) still requires notification for Part P electrical work consisting of a new circuit, a consumer unit replacement, or any addition or alteration to existing circuits in a special location such as the zone around a bath or shower. Regulation 12(8) allows a building notice after the event for emergency repairs. Text is up to date to 7 September 2026.
  13. 13technicalvery strongGOV.UK, a government page.RN-JYRZYTHow to get building regulations approval: the choice between a full plans application and a building notice, using a competent person scheme instead where the work qualifies, and the determination and appeal routes if approval is refused. This is the page that decides which route a job takes, and the route decides both the fee and how much can go wrong on site before anyone checks.
  14. 14technicalvery strongPlanning Portal, guidance.RN-INBQLGThe Planning Portal on the building notice route: what it is, when it can be used, and the timeline. A building notice needs no detailed plans and work can start 48 hours after it is given, which makes it fast and means nothing is checked before it is built. The plain explanation of the trade-off against a full plans application.
  15. 15coststrong locallyLondon Borough of Hillingdon.RN-XNWC03A price, true at 2026-09. Hillingdon's 2026-27 building control fee schedule lists a regularisation charge for each type of domestic work: £1,210 for an extension under 40 m² and £440 for minor works such as chimney breast removal or a simple structural opening.
  16. 16technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-0BAHFURegulation 17(1) requires the relevant authority to give a completion certificate in all cases where, after taking all reasonable steps, it is satisfied that the relevant provisions have been complied with following completion of the building work. Regulation 17(2) sets the specified period at eight weeks starting from the date the authority receives the regulation 16(4) completion notice, or the equivalent notice under regulation 22A(1) of the Building (Registered Building Control Approvers etc.) (England) Regulations 2024. The relevant provisions checked are listed at 17(2A) and include regulation 25A high-efficiency alternative systems, regulation 26 target CO2 emission rates, regulation 26A target fabric energy efficiency, regulation 26C target primary energy rates, regulation 36 water efficiency, regulation 38 fire safety information, Schedule 1, and regulation 7A of the Energy Performance of Buildings (England and Wales) Regulations 2012. Critically, regulation 17(4) states the certificate is evidence but not conclusive evidence of compliance, and 17(5) requires the certificate itself to say so. This version applies to England only.
  17. 17technicalvery strongPlanning Portal, guidance.RN-CUX72AThe same Planning Portal guidance on internal walls under its longer path: no planning permission for internal alterations in an unlisted house, but building regulations approval where the wall is load-bearing or the work affects escape routes. Both URLs are live and both are cited, which is why the library holds each as its own entry.

  1. Building Act 1984, section 36: Removal or alteration of offending work, legislation.gov.uk, accessed 30 September 2026. legislation.gov.uk

  2. Structural Engineer Costs In 2026, HomeOwners Alliance, accessed 7 September 2026. hoa.org.uk

  3. Structural Engineer Cost: From £450 | Midlands 2026, Simplify Structures, accessed 30 September 2026. Priced at 2026-09, so no calibration is needed. simplifystructures.co.uk

  4. Steel Building Design: Design Data (SCI P363, the Blue Book), The Steel Construction Institute, published on SteelConstruction.info, accessed 30 September 2026. steelconstruction.info

  5. Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments, HM Government (GOV.UK), accessed 2 October 2026. assets.publishing.service.gov.uk

  6. Sections: Universal beams (UB), dimensions and properties, British Steel, accessed 7 September 2026. britishsteel.co.uk

  7. Concrete Padstone 440 x 215 x 102mm, Selco Builders Warehouse, accessed 2 October 2026. Priced at 2026-09 and left there. selcobw.com

  8. Party Wall etc. Act 1996, section 2: Repair etc. of party wall: rights of owner, legislation.gov.uk, accessed 30 September 2026. legislation.gov.uk

  9. Party Wall etc. Act 1996, section 3: Party structure notices, legislation.gov.uk, accessed 30 September 2026. legislation.gov.uk

  10. The Building Regulations 2010, regulation 3: Meaning of building work, legislation.gov.uk, accessed 30 September 2026. legislation.gov.uk

  11. Do I need planning permission to move an internal load bearing wall?, Planning Portal, accessed 7 September 2026. interactive.planningportal.co.uk

  12. The Building Regulations 2010, regulation 12: Giving of a building notice or an application for building control approval, legislation.gov.uk, accessed 7 September 2026. legislation.gov.uk

  13. Building regulations approval: How to apply, GOV.UK, accessed 7 September 2026. gov.uk

  14. Building notice, Planning Portal, accessed 7 September 2026. planningportal.co.uk

  15. Building control fees 2026/27, London Borough of Hillingdon, accessed 2 October 2026. Priced at 2026-09 and left there. pre.hillingdon.gov.uk

  16. The Building Regulations 2010, regulation 17: Completion certificates, legislation.gov.uk, accessed 30 September 2026. legislation.gov.uk

  17. Internal walls - Planning Permission, Planning Portal, accessed 7 September 2026. planningportal.co.uk