BUYING A LONDON HOME TO RENOVATE: IS IT STILL WORTH IT?

By Alex Greaves, Founder of Ridgestone Property | September 2026

Buying a London home that needs renovation can offer the chance to secure a better location, create a layout that suits your family and avoid paying for someone else’s taste. But an unmodernised property is only good value if the purchase price leaves enough room for the work, the associated costs and the uncertainty involved.

The important comparison is between the total cost of creating your home and the cost of buying a genuinely comparable property that is already finished. A lower asking price is only the starting point.

For buyers willing to take on a project, there can still be worthwhile opportunities. The key is knowing which improvements justify the expense and agreeing a purchase price that reflects what lies ahead.

Why a renovation property can still make sense

The strongest reason to buy a project is often the property itself: a good position on the right street, attractive proportions, natural light or a garden that works for your family.

Those qualities can be difficult to find in the right combination. A dated kitchen or tired decoration may be a manageable compromise if the fundamentals are strong.

Renovating also gives you control over the specification. Buying a recently refurbished home can be expensive if you then replace the kitchen, bathrooms or flooring because they do not suit you.

However, there is a significant difference between updating a sound house and undertaking major structural work. Both may be described as a “renovation opportunity”, but the budgets, timescales and demands on the buyer can be very different.

Compare the full cost, not just the builder’s estimate

A building estimate is one part of the calculation. Depending on the project, the budget may also need to include:

• Architect, structural engineer, surveyor and project management fees.
• Relevant applications, approvals and party wall costs.
• VAT where applicable, with clarity over whether estimates include it.
• Temporary accommodation, storage and additional removals.
• Finance, insurance and property running costs during the work.
• A contingency appropriate to the scope and condition of the building.
• Items excluded from the building quote, such as some fittings, landscaping or final decoration.

Check the scope carefully. Two contractors can offer very different prices because they have allowed for different work, finishes or assumptions. An attractive headline estimate is of limited use if substantial items remain unpriced.

The same applies to time. Your budget should account for obtaining approvals, finalising designs, appointing contractors and resolving unexpected issues, as well as the construction period itself.

A lower purchase price can also mean less stamp duty

The stamp duty difference is another benefit to include. For a straightforward purchase followed by separately commissioned renovation work, SDLT is generally calculated on the purchase consideration, rather than the home’s eventual refurbished value. Ask your solicitor to confirm the treatment of your transaction.

In the example below, buying at £1.35 million rather than £1.85 million reduces standard residential SDLT from £135,750 to £78,750: a £57,000 difference. The calculations use HMRC’s residential rates checked on 23 September 2026 and assume an individual buyer with no additional-property or non-resident surcharge. Your actual liability depends on your circumstances, including whether a previous main home has been sold.

Could an empty home qualify for 5% VAT on renovation work?

Qualifying renovation work may attract 5% VAT rather than 20% where an eligible home has not been lived in for at least two years immediately before work starts. This is a VAT provision, not a reduced stamp duty rate.

A probate property may qualify, but probate alone does not establish eligibility. Reliable vacancy evidence is needed, such as council tax or utility records, or confirmation from the council’s Empty Property Officer.

The reduced rate covers qualifying work and eligible materials supplied and installed by the contractor. It does not cover every project expense: separately supplied professional services, landscaping and certain fittings remain standard-rated. Occupation before work starts can affect eligibility, although HMRC provides a limited exception for some new occupiers.

Check the evidence, scope and timing with the contractor and a tax adviser before budgeting for relief. See HMRC VAT Notice 708, section 8.

A worked example: renovation versus ready to move into

Imagine two houses with comparable locations, size, gardens and accommodation once the work is complete. The two renovation columns show alternative tax scenarios for the same project.

Cost	Renovation: 20% works VAT	Renovation: qualifying 5% works VAT	Finished comparable home
Purchase price	£1,350,000	£1,350,000	£1,850,000
Stamp Duty Land Tax	£78,750	£78,750	£135,750
Building works before VAT	£250,000	£250,000	—
VAT on those building works	£50,000	£12,500	—
Professional fees and approvals, including applicable VAT	£40,000	£40,000	—
Contingency allowance	£45,000	£45,000	—
Temporary accommodation, storage and extra moving costs	£35,000	£35,000	—
Illustrative subtotal including SDLT	£1,848,750	£1,811,250	£1,985,750
Difference versus finished home	£137,000	£174,500	—

Illustrative figures, not a construction quote, valuation or client transaction. SDLT assumes the standard residential rates described above. The 5% scenario assumes all £250,000 of the specified building works qualifies; mixed-rate projects require a split. Professional fees and the £45,000 cash contingency are unchanged. The finished home is assumed to need no immediate work. Legal fees, purchase surveys, buying-agent fees, finance costs and differences in ongoing running costs are excluded and must be assessed separately.

The original £80,000 gap before stamp duty becomes £137,000 after including the £57,000 SDLT difference. Where the illustrated works qualify for 5% VAT, a further £37,500 reduction takes the gap to £174,500.

These figures make the potential benefits clearer, but they are not guaranteed savings or profit. The remaining costs, possible overruns and your time still matter. Any unused contingency would improve the final outcome; expenditure beyond it would reduce the margin.

Use realistic evidence for the finished comparable. An optimistic asking price for a refurbished house does not establish what your property will be worth after the work.

What should you check before committing?

Early advice helps distinguish a feasible project from an expensive assumption. Investigate the essentials before making an offer, and resolve material uncertainties before exchange.

The condition of the building. Commission an appropriate survey and follow up any recommended specialist investigations. RICS identifies its Level 3 Home Survey as suitable for properties that are older, run-down, unusual or significantly altered, and where major works are planned. Agree the scope with your surveyor: a survey is not a detailed construction budget.

Whether the proposed changes are achievable. Ask an architect or other suitably qualified professional to assess the layout and likely approval requirements. Planning permission and building regulations approval are separate matters; listed building consent may also be required. A neighbour’s extension does not establish that your own proposal will be acceptable.

The position with adjoining properties. Certain works to party structures or excavations near neighbouring buildings may engage the Party Wall etc. Act. Get advice on the process and allow for its timing and costs.

Restrictions affecting a flat. Have your solicitor check the lease and the consent requirements for alterations. A share of freehold should not be treated as permission to change the property however you wish. Also investigate the wider building’s condition and planned communal expenditure.

Funding and insurance. Confirm that the property’s condition and your proposed works are compatible with the intended lending and insurance arrangements. Funding the purchase and having enough accessible money to complete the renovation are separate considerations.

Which compromises are worth making?

Dated finishes can be an opportunity. A fundamentally poor position is much harder to improve.

A new kitchen will not change traffic noise, an overlooked garden or limited natural light caused by surrounding buildings. Adding floor area does not necessarily produce better accommodation if the result is awkward or dominated by circulation space.

Assess the finished home as carefully as the existing one. Will the work create comfortable, usable rooms? Is the garden still practical after an extension? Does the specification make sense for the location and likely future buyers?

Personal choices can be entirely worthwhile for a long-term home. They should simply be recognised as spending on your own enjoyment, rather than assumed to add an equal amount to the resale value.

When is buying a finished home the better decision?

A completed property can make more sense when you have a firm move-in date, limited time to manage decisions or little flexibility for additional expenditure.

This can be particularly relevant for families coordinating a school move or buyers arranging a purchase from overseas. The cost of temporary accommodation matters, but so does the disruption of moving twice and managing a building project alongside work and family life.

Paying more for a finished home can be reasonable if the quality is good, the layout suits you and the alternative offers only a modest saving after costs. A recently renovated property still needs appropriate survey and legal checks, including the documentation for relevant works.

How a buying agent can help assess a renovation purchase

The buying decision brings together the property’s current condition, the feasibility of your plans, the total budget and evidence of comparable values.

At Ridgestone Property, our London property search service helps buyers assess opportunities and negotiate with a clear understanding of the property and its market position. My background across residential sales, new homes and development consultancy informs that assessment, alongside the specialist advice a particular project requires.

A buying agent’s role complements the work of your solicitor, surveyor, architect and contractor. It helps bring their findings into the purchase decision and keeps the offer grounded in what the home is worth to you once the costs and compromises are understood.

Buying a London home to renovate can still be worthwhile. The strongest purchases combine a good underlying property, achievable plans and a price that leaves sufficient room to complete the work properly.

Considering a London home that needs renovation? Contact Ridgestone Property to discuss your search and how we can help you assess the options before committing.