How to Value Your Property: What Estate Agents Don’t Tell You
How to establish a realistic market value for your home using sold price data, comparable analysis, and independent tools — and why estate agent valuations are often inflated.
Published: 17 Mar 2026 · Updated: 17 Mar 2026 · 7 min read
Getting the asking price right is one of the most important decisions a seller makes. Too high and the property sits unsold, accumulating days on market that make buyers suspicious. Too low and you leave money on the table.
Why Estate Agent Valuations Can Mislead
Estate agents are often incentivised to give high valuations to win the instruction. A seller who receives a £380,000 valuation from one agent and £350,000 from another will often instruct the first — even if £380,000 is unrealistic.
The result: properties listed at inflated prices sit on the market, are reduced repeatedly, and eventually sell for less than they would have achieved with a realistic asking price from the start.
How to Value Your Property Yourself
Step 1: Find genuine comparable sales
The most reliable indicator of value is what similar properties have actually sold for. Use:
- **Property Passport UK** — sold prices from HM Land Registry for every property in England and Wales
- **HM Land Registry Price Paid** — the authoritative source
- **Rightmove ‘Sold Prices’** tab
Look for sales of:
- Same or similar property type (detached, semi, terrace, flat)
- Same approximate size (floor area if known)
- Same street or nearby streets
- Within the last 6 months (12 months maximum; adjust for market movement)
Step 2: Adjust for differences
Raw comparable prices need adjustment for differences between the comparables and your property:
- **Condition:** A recently refurbished comparable adds 5–10%; a property needing work deducts
- **Garden:** Larger or south-facing gardens attract a premium
- **Parking:** Off-street parking adds value in urban areas
- **Floor:** Ground floor flats attract a discount; top floor with good views a premium
- **EPC rating:** A and B-rated properties command a premium; F and G-rated properties face discounts
Step 3: Check current competition
Search Rightmove for similar properties currently listed in your area. These are your competition. If similar properties are priced at £350,000, pricing at £360,000 means buyers compare unfavourably.
Step 4: Use automated valuation tools as a sanity check
Zoopla, Rightmove, and Property Passport UK all provide automated valuations. These are computer-generated estimates based on comparable sales data and should not be treated as definitive, but they provide a useful baseline and flag if an estate agent’s valuation is significantly above the algorithmic estimate.
What Affects Your Property’s Value Most
| Factor | Approximate impact |
|---|---|
| Location (street, area, school catchment) | 10–30% vs comparable |
| Size (floor area) | Direct relationship |
| Condition | ±5–15% |
| EPC rating | A/B adds 2–5%; F/G deducts 2–8% |
| Outdoor space | Garden premium varies 3–10% |
| Tenure (freehold vs leasehold) | Freehold premium 5–15% in most markets |
| Parking (in cities) | Off-street adds £10,000–30,000 in some areas |
Getting Agent Valuations
Get valuations from at least three agents. Ask each:
- What are the comparable sales you have used?
- Can you show me those comparables?
- What is your realistic expected sale price, not just asking price?
- How long do you expect the property to take to sell at this price?
An agent who cannot show you comparables for their valuation is guessing.
The Impact of Overpricing
Properties listed 10% above market value typically:
- Attract fewer viewings in the first critical 2 weeks
- Accumulate days on market that make buyers suspicious
- Are reduced 1–3 times before selling
- Ultimately sell for less than if priced correctly from the start
The asking price is a signal. Buyers who see a property reduced twice before making an offer know the seller is motivated and will negotiate harder.
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