How much is 20 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB worth?
Estimated value — November 2026
£697,000
Likely range £475,000 – £933,000Four in five similar homes sold within their range when we tested it.
Latest recorded sale July 1995
42%
confidence
Low
Typically within 15% of the sale price
Property details
Semi-detached house
Southfields Avenue · Ashford · TW15 1LB
Address
- District
- Spelthorne
- County
- Surrey
Value over time
- Modelled value
- Projected
- Likely range (80%)
- Today's estimate
Drawn through each of this property's recorded sales and ending at today's estimate, with the UK House Price Index for its area and property type filling in the months between. The shaded band is where four in five prices fell when we tested this line against real sales of similar homes; it widens the further a month is from a recorded sale, and today it matches the likely range above.
View as a table
| Year | Modelled value | Likely range |
|---|---|---|
| 2000 | £221,096 | £181,308 – £263,566 |
| 2001 | £261,290 | £211,621 – £313,320 |
| 2002 | £325,758 | £261,069 – £391,892 |
| 2003 | £353,048 | £279,835 – £426,764 |
| 2004 | £393,939 | £308,205 – £479,551 |
| 2005 | £411,827 | £317,982 – £505,091 |
| 2006 | £438,525 | £334,590 – £541,853 |
| 2007 | £475,239 | £359,606 – £592,115 |
| 2008 | £411,055 | £309,455 – £516,029 |
| 2009 | £407,812 | £305,096 – £516,872 |
| 2010 | £416,803 | £310,207 – £532,002 |
| 2011 | £414,370 | £344,665 – £488,471 |
| 2012 | £426,078 | £350,037 – £506,914 |
| 2013 | £446,493 | £362,234 – £536,066 |
| 2014 | £487,129 | £390,209 – £590,161 |
| 2015 | £510,561 | £403,748 – £624,110 |
| 2016 | £558,714 | £436,102 – £689,059 |
| 2017 | £579,380 | £446,296 – £720,857 |
| 2018 | £601,547 | £457,207 – £754,990 |
| 2019 | £607,109 | £455,213 – £768,584 |
| 2020 | £634,529 | £469,271 – £810,209 |
| 2021 | £672,194 | £490,238 – £865,624 |
| 2022 | £708,602 | £509,530 – £920,228 |
| 2023 | £688,355 | £487,918 – £901,432 |
| 2024 | £691,719 | £483,214 – £913,373 |
| 2025 | £705,858 | £485,859 – £939,731 |
| 2026 | £697,000 | £475,000 – £933,000 |
Sale history
Mortgage calculator
£3,741
Estimated monthly repayment
£627,300
Loan amount
£719,402
Total interest
£1,346,702
Total repayable
A guide only, based on a capital repayment mortgage held at a constant interest rate for the full term. Not a mortgage offer or financial advice.
Related properties
- 14 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£382,500 · 2013£666,000
- 12 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£590,000 · 2024£609,000
- 3 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£550,000 · 2021£577,000
- 27 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£455,000 · 2020£541,000
- 9 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£420,000 · 2017£546,000
- 11 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£410,000 · 2016£525,000
- 17 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£342,000 · 2014£556,000
- 25 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£485,000 · 2025£504,000
- 19 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£430,000 · 2021£490,000
- 21 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB£413,500 · 2018£499,000
About this property
20 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB is a semi-detached house on Southfields Avenue in Ashford, Surrey. Stede's estimated value for November 2026 is £697,000. Four in five similar homes sold within their likely range when tested; for this property that range is £475,000 to £933,000. It combines its own last sale brought up to date with the House Price Index (75%) and recent sales of 127 similar homes in the same postcode sector (25%). The confidence score is 42 out of 100 (low): estimates like this one are typically within 15% of the eventual sale price.
It last sold in July 1995 for £137,500. The current estimate is 407% higher than that price. The current owner has held it for about 31 years.
The modelled value is down 1% over the past year and up 4% over the past five years.
Among 10 nearby properties Stede tracks in the TW15 area, estimated values run from £490,000 to £666,000. This semi-detached house's £697,000 sits above that range.
Common questions
How much is 20 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB worth?
Stede estimates 20 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB is worth £697,000 as of November 2026, within a likely range of £475,000 to £933,000. The estimate is generated automatically from recorded sale prices of this and similar nearby homes and the UK House Price Index, and is not a formal valuation.
When did 20 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB last sell?
It last sold in July 1995 for £137,500.
What type of property is 20 Southfields Avenue, Ashford, Spelthorne, Surrey, TW15 1LB?
It is recorded as a Semi-detached house on Southfields Avenue in the TW15 postcode area.
How reliable is this estimate?
The confidence score is 42 out of 100 (low). Tested against real sales of similar homes, estimates like this one are typically within 15% of the sale price, and four in five sold within their likely range. The figure is a data model, not a RICS valuation or Home Report, and should not be used for mortgage or legal decisions.
How does Stede calculate this estimate?
It combines its own last sale brought up to date with the House Price Index (75%) and recent sales of 127 similar homes in the same postcode sector (25%). Each piece of evidence gets the share that proved most accurate when tested against real sales of similar homes, and the same testing sets the likely range and confidence. Full detail is on the methodology page.
How we got this figure
We weighed the evidence below, giving each piece the share that proved most accurate when we tested it against real sales of similar homes. The likely range and confidence come from testing the same method against 21,281 real sales of similar homes.
- Its sale in July 1995, brought up to today with the House Price Index£769,21675%
- 127 similar homes sold recently in the same postcode sector£479,42025%
Estimate £697,000, likely £475,000 – £933,000
Read the full methodology and data sources →