Staircase Installation Cost UK: Pricing Guide 2024

Quick Answer: Standard straight softwood staircase £450–£900 supply, £600–£1,100 fit (one day, 2 carpenters). Quarter-turn with half landing £900–£1,600 supply, £900–£1,500 fit. Hardwood (oak, walnut) doubles cost. Bespoke open-string or floating designs £3,000–£15,000+. All staircases must meet Building Regulations Part K (pitch, going, rise, headroom) and Part B (fire/escape) under BS 5395-1.

Summary

Staircase installation is high-margin trade work that sits between joinery (manufacture/supply) and general carpentry (fit). Get the survey wrong and the stairs don't fit; quote the wrong material spec and margin disappears in correction work. Get the Building Regs wrong and you fail inspection — costly to rectify after fit-out.

The market has three tiers:

This guide covers all three tiers, Building Regs Part K compliance, balustrade and handrail requirements, and how to package the supply and fit components.

Key Facts

Quick Reference Table

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Type Supply Trade Fit Labour Balustrade Total Installed
Straight softwood (closed string) £450–£900 £600–£1,100 £180–£450 £1,200–£2,450
Straight pine (closed string, paint-grade) £350–£700 £600–£1,100 £150–£400 £1,100–£2,200
Straight oak (closed string) £900–£1,800 £700–£1,300 £400–£900 £2,000–£4,000
Quarter-turn (half landing) softwood £900–£1,600 £900–£1,500 £300–£700 £2,100–£3,800
Quarter-turn oak £1,800–£3,200 £1,000–£1,800 £600–£1,400 £3,400–£6,400
Open-string winder (mid-flight curve) £2,200–£4,500 £1,400–£2,400 £800–£1,800 £4,400–£8,700
Bespoke joinery-shop oak £4,500–£12,000+ £1,500–£3,500 £1,500–£4,000 £7,500–£19,500+
Glass balustrade upgrade n/a £400–£800 £1,200–£3,000 + £1,600–£3,800
Replacement spindle set £200–£600 £400–£900 included £600–£1,500
Newel post replacement (decorative) £80–£300 each £150–£300 each n/a £230–£600 each

Detailed Guidance

Survey first — measure twice, order once

A staircase survey takes 30–45 minutes:

  1. Floor-to-floor measurement — Vertical from finished ground floor to finished first floor surface, both at top and bottom of stair
  2. Total going (length) — Floor space available for the stair run
  3. Width — Wall to wall or stairwell width
  4. Headroom — Clearance above any step; check at top of flight where ceiling lowest
  5. Stairwell shape — Straight? Quarter turn? Half turn? Open at top, bottom, both?
  6. Doors and openings — Where stair lands; what doors are nearby
  7. Substrate — Joists for stair to land on; wall structure for fixing newels

Mis-measure and the stair won't fit. Order-then-discover-it's-wrong is a £1,000+ mistake.

Going, rise, and pitch — the maths

Building Regs Part K requires the rise and going relationship to fit a comfort formula:

2R + G = 550–700mm (for private stairs)

Where R = rise height, G = going (tread depth)

For example:

Plus rules:

For a 2,600mm floor-to-floor with 13 risers: rise = 200mm. Comfortable, well within limits.

Manufacturer specification process

Most domestic stairs are made-to-order by specialist manufacturer. Process:

  1. Site survey by you or stair company surveyor
  2. Drawing produced — Manufacturer's design office produces cutting drawing
  3. Sign-off by client — Customer agrees design and finish
  4. Manufacturing 3–6 weeks — Kit cut to spec
  5. Delivery to site — Often direct to fit day
  6. Install 4–8 hours — Carpenter team assembles and fits
  7. Snag list — Client and BC inspector check

Typical manufacturers handle the design and Building Regs compliance for you — but always verify their drawing against your survey before signing off.

Installation sequence

  1. Remove old stair if replacement (allow 2–4 hours strip-out)
  2. Make-good substrate — Joists, hangers, wall fixings
  3. Position newel posts — Bottom newel first, fixed to substrate
  4. Fit strings (closed) or carriage (open) — Sides of staircase
  5. Fit treads and risers — Bottom to top
  6. Fit top newel — Connecting to landing structure
  7. Fit balustrade — Spindles, top handrail
  8. Wall side handrail — Fixed to wall at correct height
  9. Stop-chamfer and trim — Cosmetic finishing
  10. Sand and prep for finish — If supplied unfinished

A skilled 2-carpenter team installs a standard straight closed-string in 4–6 hours. Quarter-turn 6–8 hours. Bespoke 1–3 days.

Closed-string vs open-string

Closed-string (cut-string from below, side panel above): Most domestic. Side panel hides tread profile from below. Easier to manufacture, cheaper.

Open-string: Tread profile visible from side. Treads "sit" on cut-string profile. Cleaner look, more expensive. Common in high-end staircases.

Cut-string (cantilever from wall): Treads project from wall only, no string opposite. Architectural look, requires structural wall support. Specialist.

Balustrade systems

Standard:

Upgrades:

Spindle spacing: max 100mm gap between (Part K — sphere rule, child can't get head through).

Building Control sign-off

For new dwellings: BC inspector signs off staircase as part of completion. Common reasons for failure:

For replacement in existing dwelling (like-for-like): BC not always required. New stair to new opening or completely different layout: BC notification required.

Bespoke joinery work

For high-end work (oak open-string, glass balustrade, curved stair):

Quoting:

Typical bespoke project £6,000–£18,000+ depending on complexity. Margin good but risk high; structural engineer often involved.

Removing old staircase

Strip-out adds 2–4 hours labour plus disposal:

Always quote strip-out as separate line. Some old stairs hidden in panelling — additional discovery work.

Worked example — straight softwood replacement

Existing 2-storey end-terrace, 2,600mm floor-to-floor, straight closed-string stair replacement (like-for-like).

For oak equivalent: add £900–£1,400 supply + £200 fit = ~£3,800–£4,400 quoted.

Frequently Asked Questions

Can I keep my existing staircase and just refinish it?

Yes — sanding and re-staining/re-painting an existing staircase typically £400–£900 for a 2-storey domestic stair. Includes sanding treads (industrial sander), filling joints, primer and 2 coats finish. For structural issues (squeaks, sag, loose treads), repair before refinishing.

Do I need planning permission for a new staircase?

Not for like-for-like replacement. For new opening or significantly different layout: Building Regulations approval required, planning sometimes. For loft conversion: full Building Regs (Part B, K, L) and planning (in many cases).

How wide should my staircase be?

Minimum 800mm clear width (Part K). 900mm comfortable. 1,000mm+ feels generous. For 2-storey single dwelling: 800–900mm typical. For wider hallways or larger properties: 1,000–1,200mm. Width affects manoeuvring furniture more than walking comfort.

What's a winder vs landing?

Winder: Triangular tread changing direction (e.g. 3 winders for 90° turn). Saves floor space; harder to descend safely; restricted in Part K (each winder must meet narrow-end going minimum).

Half-landing: Full-platform turn (e.g. straight up, landing, straight up again). Safer, easier; takes more floor space. Preferred for steeper houses or where space allows.

Most domestic preference: half-landing over winders. Winders work where space is constrained.

How long does a new staircase take?

Manufacturing 3–6 weeks. Site install 1 day (straight) to 3 days (bespoke). Total elapsed time from order to use: 4–8 weeks. Add planning/BC if structural opening changing.

Regulations & Standards