How Much Does It Cost to Renovate a House in London?

The honest answer is that renovation costs in London vary enormously — a light cosmetic refresh is a fundamentally different exercise to a full gut-and-reconfigure of a Victorian terrace. As a working guide, residential renovation in London typically ranges from around £800 to £2,500+ per square metre depending on scope, specification, and the condition of the property you are starting with. These figures are indicative only and should not be treated as a quotation; every project requires a proper survey and detailed specification before any reliable pricing can be produced.

Understanding what drives cost is more useful than any headline figure. The sections below break down the main variables.

Scope and specification

The single biggest lever on cost is what you are actually doing. A cosmetic renovation — new flooring, replastered walls, redecorated throughout — sits at the lower end of the range. A full refurbishment involving structural alterations, a new kitchen and bathrooms, rewiring, new plumbing, and insulation upgrades will sit considerably higher.

Specification matters just as much as scope. The cost difference between a well-made, mid-range kitchen and a bespoke joinery fit-out can be £20,000 or more. Flooring, sanitaryware, tiles, and ironmongery all follow the same logic: the market for these products spans an enormous price range, and your choices compound across every room.

For a sense of how scope affects the overall budget, our renovation costs guide for London properties sets out more detailed breakdowns by project type.

Property condition

Older properties — particularly pre-war terraces and Victorian stock — frequently contain concealed problems that only become apparent once work begins. Inadequate subfloor ventilation, historic damp treatment that has failed, knob-and-tube wiring tucked behind plasterwork, or buried drainage in poor condition: none of these are visible at the outset, but all carry a cost when discovered.

A thorough pre-contract survey reduces (though cannot eliminate) these surprises. If you are buying a property specifically to renovate, commissioning a full structural survey before exchange is strongly advisable.

London-specific factors

Labour rates in London are materially higher than national averages. Access and logistics also add cost: restricted parking, narrow roads, conservation area restrictions on skip placement, and the general density of the city all affect programme and price.

Planning and regulatory requirements can also add time and cost, particularly for period property renovation in conservation areas, where certain materials and methods may be specified by the local authority.

Professional fees

A common mistake is to budget only for construction and treat professional fees as an afterthought. For a comprehensive project, fees for an architect, structural engineer, and project manager can add 10–20% to the base construction cost.

These fees are not optional extras — they are what translate a rough brief into a buildable, costed, coordinated set of information. Projects that cut corners on professional input tend to encounter more problems during construction and spend more resolving them.

Contingency

No renovation budget is complete without a contingency. For a relatively straightforward project in a property of known condition, 10% is a reasonable minimum. For an older building, a complex structural programme, or any project where limited investigation has been possible before work begins, 15–20% is more prudent.

Contingency is not pessimism — it is the recognition that renovation, especially in older London housing stock, involves a degree of uncertainty that cannot be designed away.

VAT

Renovation work on existing residential properties is generally subject to VAT at the standard rate (currently 20%). There are specific reliefs — notably for properties that have been empty for two years or more, and for certain works for disabled occupants — but these are tightly defined. If you believe you may qualify, take advice from a VAT specialist rather than assuming eligibility.

Common mistakes

• Budgeting only for construction and omitting professional fees, surveys, and statutory costs.
• Using per-square-metre figures from other regions or from significantly different project types.
• Setting a contingency below 10%, or treating it as money that will be returned if unused.
• Proceeding with a fixed budget before a detailed specification has been agreed — cost cannot be reliably controlled without scope control.
• Overlooking the cost of temporary accommodation if the property will be uninhabitable during works.

In short

House renovation costs in London are driven by scope, specification, property condition, and professional input — not just the headline construction rate. A realistic budget requires a proper survey, a detailed specification, adequate professional fees, and a meaningful contingency. If you are at the early stages of planning a project, the next step is a conversation with a contractor and, where the project warrants it, an architect. You can get in touch with our team to discuss your project or read more about how the renovation process typically unfolds.