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Online valuation vs agent valuation: what each one is actually telling you
Online valuations and agent valuations answer different questions. Understanding what each one uses and where each one falls short helps you use both more effectively.
In this article
When you start thinking about selling, two valuation options appear almost immediately: an instant online figure, and an in-person assessment from a local agent. They're often treated as rivals. In practice they answer different questions, and the sharpest sellers use both.
What an online valuation does
An online valuation is a statistical estimate. It draws on sold-price records (the prices registered at Land Registry when a sale completes), the characteristics of the property on record, and patterns from comparable sales in the same postcode or street. Feed it your address and it returns a figure, usually in seconds.
The strength of this approach is consistency: the same data, applied the same way, every time. It has no stake in your decision to sell, no pressure to give you a number that flatters you or under-promises so it can manage your expectations later. It's a starting point built on evidence. (We've written before about how Home's own estimate weighs multiple AI models against each other rather than trusting a single output.)
The limits are real, though. Sold-price data at Land Registry can lag completion by several weeks, sometimes longer. An algorithm cannot see whether your kitchen was refitted last year, whether the garden backs onto a railway, or whether the street has changed since the last comparable sold. It also cannot account for live market sentiment: whether demand in your area is rising this month, or whether a cluster of similar properties has just come to market and is competing for the same buyers.
You can explore what sold in your area on our house prices section, which gives you the same underlying data the estimate draws on, or run an instant valuation yourself to see the figure Home produces for your address.
What an agent valuation does
A local estate agent brings things that data alone cannot carry. They know the streets they sell on. They'll walk your home and adjust for condition, layout, what's been done and what needs doing. They'll tell you which buyers are already registered with them and looking for something like yours. They have a live read on how long comparable properties are sitting before they sell, and at what percentage of asking price.
A good agent valuation is, in effect, a priced sales strategy. The figure they give is an assessment of what a buyer will pay in the current market, not just what your home is worth in the abstract. That nuance matters.
The risk with agent valuations is the inverse: they can be shaped by commercial pressure. An agent competing to win your instruction may pitch a higher figure to secure the listing, then guide you toward a reduction once the property has been on the market for a few weeks. This is common enough to have its own name in the industry: "overvaluing to win." Our guide on how to find the right estate agent to sell your home covers how to spot this before you sign an instruction.
How to use both well
Start with Home's instant valuation, run it free on our house prices page, to get your bearings before any agent conversations. You'll see both the estimate and the comparable sales data behind it, so you walk into those meetings with a reference point and a sense of how the figure you're given compares to the data picture.
Then book valuations with two or three local agents (not just one), and compare their figures against what Home's valuation said. Treat any that comes in significantly above as a conversation point rather than a green light. Ask which comparable properties support that number and how recently they sold.
The combination of data grounding and local knowledge is more reliable than either on its own. Neither should be ignored and neither should be taken uncritically.
Browse agents on Home to find local agents with verified reviews, or check house prices in your street before you start.
Sold prices in the house-prices section come from Land Registry records and may not reflect recent completions. Online valuations are estimates; rely on your agent's in-person assessment when you come to price your listing.
Further reading: the ONS UK House Price Index.
