RSJ Steel Beam Cost UK 2026

An RSJ (Rolled Steel Joist) supply-and-install in 2026 costs £800–£2,500 — depending on length, depth and access. The steel itself is typically £300–£900; the rest is engineer, props and labour.

Quick answer

Typical UK price range: £800–£3,500. Typical time: 1–2 days.

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Job type Remove load-bearing wall Remove partition wall Knock through (2 rooms) Open plan kitchen-diner Single RSJ only

Region London South East South West Midlands North of England Scotland Wales Northern Ireland

Specification level Basic / standard Mid-range Premium / high-end

Extras

Structural engineer fee £350–£800 Building control £250–£600 Make-good plastering £600–£1,500 Flooring make-good £400–£1,200 Localised rewire £350–£900

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Estimate only. Prices reflect 2026 UK market data — get quotes from local tradespeople for accurate pricing.

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Budget Under £5,000 £5,000 – £15,000 £15,000 – £30,000 £30,000 – £60,000 £60,000+ Not sure

Timeline As soon as possible 1 – 3 months 3 – 6 months 6+ months Just researching

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Key points

• Steel supply: £300–£900 for typical sizes
• Engineer fee: £350–£800
• Acro props: £200–£500
• Labour to lift + install: £400–£1,200

Cost breakdown

Item	Low	High
Steel beam (3–5 m, 152 UB)	£300	£900
Structural engineer	£350	£800
Acro props	£200	£500
Padstones + bearing	£150	£350
Install labour	£400	£1,200

Cost by UK region

Region	Typical cost
London	£2,902
South East	£2,687
South West	£2,365
Midlands	£2,150
North England	£1,935
Scotland	£2,042
Wales	£1,935

How to save money

• Always confirm padstone size with the engineer
• Cover the steel with intumescent paint if exposed
• Order the steel pre-drilled for hangers

How to find a trusted tradesperson

Get at least 3 quotes from vetted UK trade networks:

• Checkatrade
• MyBuilder
• Bark

FAQs

What size RSJ do I need?

Your structural engineer calculates this based on span and loading. Common sizes: 152×89 UB for short spans; 203×133 UB for wider; 254×102 for big openings.

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Disclaimer: Prices are guide ranges based on 2026 UK market data. Get quotes from local tradespeople for accurate pricing.