Staircase Renovation & Replacement Cost

The staircase is a focal point of a home and, in period London houses, often a tired one. This guide covers what a staircase costs to renovate or replace in 2026, the Part K rules that decide whether the job passes Building Control, and when each option makes sense.

How much does a staircase cost in London?

A new standard staircase costs around £1,500 to £4,000 installed, with London at the upper end, while a bespoke staircase in oak, glass or a feature open design costs from £5,000 to £50,000 or more, according to Checkatrade and MyJobQuote. Renovating what you already have is a different order of money: a repaint and new carpet starts around £500, and a full oak cladding and balustrade upgrade lands at £2,000 to £5,000.

What do the individual parts cost?

Staircase components are cheap; the labour and the finish are where the money goes. That is why a balustrade upgrade is one of the best-value jobs in a house and why an oak staircase costs several times a softwood one for the same amount of fitting.

Renovate or replace?

Renovate if the strings, treads and newels are structurally sound, which in a Victorian or Edwardian house they usually are. A creak, a worn nosing or a wobbly bannister are not reasons to replace a staircase. Fixing the balustrade, cladding or repairing the treads and redecorating gives you a new-looking stair for a fraction of the price, and it keeps original joinery that cannot be bought back.

Replace if the stair is unsafe or non-compliant in ways that cannot be corrected in place: rotten or split strings, risers pulling away, a pitch far outside Part K, or a stair that has to move because you are reconfiguring the floor. Replacement is also the honest answer where a previous owner has already fitted something substandard, which is common in converted flats and old loft conversions.

One warning on period houses. Stripping paint from a pre-1980 staircase can disturb lead paint, and the safe approach is chemical stripping or encapsulation rather than dry sanding. Factor that in before you plan a bare-timber look.

What does Part K require?

Part K of the Building Regulations sets the geometry of a staircase, and it is where most staircase projects fail Building Control. For a private stair in a dwelling the rules are specific and unforgiving:

• Rise: maximum 220mm, and every step in a flight must have the same rise.
• Going: minimum 220mm, again identical throughout the flight.
• The 2R plus G rule: twice the rise plus the going must fall between 550mm and 700mm. This is what stops a stair being either exhaustingly steep or uncomfortably shallow.
• Pitch: maximum 42 degrees.
• Headroom: 2,000mm measured vertically from the pitch line. In a loft conversion this relaxes to 1,900mm at the centre of the stair width and 1,800mm at the edge.
• Handrail: 900mm to 1,000mm above the pitch line, on at least one side. Stairs 1,000mm wide or more need a handrail on both sides.
• Guarding: required wherever there is a drop of more than 600mm, and no gap anywhere in the balustrade may allow a 100mm sphere to pass through.
• Open risers: treads must overlap by at least 16mm, and the 100mm sphere rule applies to the gaps between them too.

The reason this matters in London is space. In a narrow terrace, the going and the pitch fight the available floor area, and the headroom rule fights the position of the ceiling opening above. Getting a compliant stair into a tight plan is a design problem, not a shopping problem, and it needs solving before anything is ordered.

Fire is a separate issue under Part B. Converting a loft creates a third storey, which usually means a protected stairway with fire doors and a compliant escape route all the way to the front door. That requirement drives a large part of the cost in a loft conversion and catches people out repeatedly.

What is commonly missing from a quote?

Staircase quotes look simple and rarely include everything. Check for:

1. Removing and disposing of the old stair, which is normally an extra.
2. Making good. Taking out a staircase leaves damaged plaster on the flanking walls and gaps in the floor at top and bottom.
3. Flooring at the head and foot. A new stair rarely lands in exactly the same footprint, so expect some flooring repair.
4. Decoration. Most stairs are supplied unfinished, and painting or staining is a separate trade at £225 to £700.
5. Carpet or runner, almost always excluded.
6. Building Control fees and inspections where the work is notifiable.
7. Lead time. A bespoke stair is a manufactured item with a six to twelve week wait, not something a joiner turns up with.

Relocating a staircase

Moving a staircase is a significant structural project rather than a joinery one. The floor has to be re-trimmed around a new opening, the joists cut and supported, often on a steel beam designed by a structural engineer, and the headroom checked against Part K at the new position before anything is committed. Expect a structural engineer's design and calculations, Building Control involvement, and a programme of several weeks rather than days. As an indicative figure, a relocation within an existing floor plan typically runs to five figures once the structure, making good and finishes are counted.

It is almost always done inside a bigger reconfiguration, because the same steel and the same making good are already being paid for. GS Renovation renovates, replaces and relocates staircases across London as part of period property and whole-house projects, and handles the engineering through our structural alterations and load-bearing wall removal teams. If you are refreshing rather than rebuilding, our hallway ideas guide and decorating cost guide cover the finishing. For a free quote, contact us or call 07472 424 226.

For the work itself, see full home renovations in London. For how a job like this is priced and run, see what to check before hiring any London builder.