Can I move my staircase?

Yes — common in side-return extensions to flip stair from front to back. Structural calcs and floor opening engineering required. Adds £4,500–£12,000 over a like-for-like replacement.

Do I need building regs sign-off?

Yes — staircase changes require building control inspection. Part K compliance checked at completion.

Cantilevered (floating) stair — realistic?

Yes but expensive (£25,000–£60,000) and requires structural wall to anchor treads. Engineer-designed; not a DIY job.

Does Builderr replace staircases?

Yes — softwood through bespoke cantilevered. Part of renovation and loft conversion packages.

Quick Answer

How Much Does Staircase Replacement Cost in London?

London staircase replacement costs (supplied and fitted): standard softwood straight-flight £2,400–£4,500, oak closed-string £4,500–£9,500, open-tread oak with steel stringer £8,500–£16,500, glass balustrade £3,500–£7,500 extra and full bespoke designer stair £15,000–£45,000+. Part K building regulations apply: 220mm max rise, 220mm+ going, 1m+ headroom and 900mm balustrade height.

Full House Renovations →Get a Free Quote

Material and configuration

Softwood (pine/redwood) — standard Victorian replacement, paint-grade, cheapest. Oak (closed-string or cut-string) — heritage feature stair, character-grade or prime depending on budget. Open-tread (no riser) — modern look, requires safety detail (sphere test: 100mm sphere cannot pass through openings). Cantilevered (floating) treads — premium, structural steel/timber spine + plate fixings; £20,000–£60,000 zone.

Balustrade and handrail

Timber spindle + newel + handrail (traditional): £900–£3,500 per flight. Glass panel balustrade (frameless with clamps or steel uprights): £3,500–£8,500 per flight — popular in open-plan renovations. Steel/iron rod balustrade (industrial loft style): £2,200–£5,500. Handrail height must be 900mm above pitch line.

Regulations

Part K: max 220mm rise, min 220mm going (private stair), 2 × rise + going = 550–700mm. Max pitch 42°. 2.0m headroom. 1m+ flight width above ground floor. Open risers: no opening to pass 100mm sphere. Loft conversion stair regs slightly relaxed but still need 1.9m headroom on at least 50% of stair width.

Ready to get started?

Senior consultant call within one business hour. Free desk-based planning assessment. Fixed-scope quote — no provisional sums, no day-rate creep.