5 Common Mistakes When Valuing Refurb Projects

Getting refurb valuations right

Refurbishment projects are one of the most popular strategies for property investors in the UK. Buy a property below market value, renovate it, and either sell for a profit or refinance to hold as a rental.

The maths can look great on paper. But in practice, many investors make valuation mistakes that eat into their margins or turn a promising project into a loss. Here are five of the most common ones.

1. Overestimating the end value

It’s tempting to look at the best comparable sales in an area and assume your refurbished property will achieve the same price. But comparable values vary, and the highest recent sale might not reflect what your specific property will achieve.

Better approach: Look at a range of comparable sales, not just the top end. Consider the specific street, property type, and condition of recent sales. Be realistic rather than optimistic.

2. Underestimating refurb costs

This is perhaps the most common mistake. Initial cost estimates almost always grow once work begins. Unexpected issues (structural problems, damp, outdated electrics) can add thousands to the budget.

Better approach: Always include a contingency of at least 10-15% on top of your estimated refurb costs. Get multiple quotes before committing, and be honest about the scope of work needed.

3. Ignoring holding costs

The time between purchase and sale (or refinance) isn’t free. Mortgage payments, insurance, council tax, utilities, and finance costs all add up. A project that takes six months longer than planned can significantly impact your overall return.

Better approach: Factor in realistic timescales and all associated holding costs from day one. Include these in your initial deal evaluation, not as an afterthought.

4. Not accounting for selling costs

When calculating profit on a flip, it’s easy to focus on purchase price plus refurb costs versus sale price. But selling costs (estate agent fees, solicitor fees, and potentially capital gains tax) can take a meaningful chunk out of your profit.

Better approach: Build all exit costs into your calculations upfront. A typical estimate for selling costs in England might be 3-5% of the sale price, depending on your circumstances.

5. Rushing the initial assessment

In a competitive market, there’s pressure to move fast. But rushing through the initial valuation, skipping proper comparable research or not properly scoping the refurb, leads to poor decisions.

Better approach: Speed up the process without cutting corners on the analysis. Tools like RightValue can help you check sold prices and comparables faster without leaving the listing page, so you spend less time on research admin and more time on the numbers that matter.

The bottom line

Refurb projects can be excellent investments when the numbers genuinely work. The key is to be thorough in your initial assessment, realistic in your estimates, and disciplined about including all costs.

The investors who consistently profit from refurbs aren’t the ones who find the cheapest properties. They’re the ones who accurately assess the full picture before committing.