How much is 21 Heol Nantlais, Gorseinon, Swansea, SA4 4LS worth?
Estimated value — November 2026
£207,000
Likely range £163,000 – £240,000Four in five similar homes sold within their range when we tested it.
Latest recorded sale June 1999
62%
confidence
Medium
Typically within 9% of the sale price
Property details
Detached house
Heol Nantlais · Swansea · SA4 4LS
Energy performance
Mains Gas (Not Community) · EPC 6139-0525-6000-0429-6226 · inspected May 2021
Address
- District
- Swansea
- County
- Swansea
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 | £49,977 | £43,420 – £58,855 |
| 2001 | £53,024 | £45,697 – £61,224 |
| 2002 | £63,245 | £53,943 – £72,873 |
| 2003 | £80,876 | £68,287 – £93,466 |
| 2004 | £97,162 | £81,256 – £112,821 |
| 2005 | £109,702 | £91,015 – £127,454 |
| 2006 | £117,649 | £97,004 – £136,492 |
| 2007 | £131,505 | £107,700 – £152,588 |
| 2008 | £127,761 | £103,761 – £148,612 |
| 2009 | £114,478 | £92,235 – £133,481 |
| 2010 | £113,688 | £90,978 – £132,949 |
| 2011 | £113,903 | £90,888 – £133,616 |
| 2012 | £113,226 | £90,262 – £133,200 |
| 2013 | £117,469 | £93,506 – £138,812 |
| 2014 | £119,666 | £95,184 – £141,608 |
| 2015 | £125,854 | £109,606 – £138,040 |
| 2016 | £131,253 | £113,281 – £144,732 |
| 2017 | £135,736 | £116,088 – £150,472 |
| 2018 | £141,141 | £119,607 – £157,292 |
| 2019 | £146,866 | £123,309 – £164,534 |
| 2020 | £157,787 | £131,244 – £177,695 |
| 2021 | £181,396 | £149,462 – £205,347 |
| 2022 | £189,513 | £154,667 – £215,647 |
| 2023 | £189,816 | £153,429 – £217,106 |
| 2024 | £193,234 | £154,680 – £222,150 |
| 2025 | £205,162 | £162,623 – £237,066 |
| 2026 | £207,000 | £163,000 – £240,000 |
Sale history
Mortgage calculator
£1,111
Estimated monthly repayment
£186,300
Loan amount
£213,653
Total interest
£399,953
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
- 16 Heol Nantlais, Gorseinon, Swansea, SA4 4LS£192,500 · 2025£212,000
- 20 Heol Nantlais, Gorseinon, Swansea, SA4 4LS£180,000 · 2023£199,000
- 12 Heol Nantlais, Gorseinon, Swansea, SA4 4LS£109,995 · 2016£205,000
- 25 Heol Nantlais, Gorseinon, Swansea, SA4 4LS£71,000 · 2003£217,000
- 14 Heol Nantlais, Gorseinon, Swansea, SA4 4LS£56,000 · 2002£209,000
- 11 Heol Nantlais, Gorseinon, Swansea, Lliw Valley, West Glamorgan, SA4 4LS£49,000 · 1997£218,000
- 22 Heol Nantlais, Gorseinon, Swansea, SA4 4LS£175,000 · 2025£185,000
- 5 Heol Nantlais, Gorseinon, Swansea, SA4 4LS£164,000 · 2023£186,000
- 18 Heol Nantlais, Gorseinon, Swansea, SA4 4LS£172,500 · 2018£237,000
- 4 Heol Nantlais, Gorseinon, Swansea, SA4 4LS£117,000 · 2018£186,000
About this property
21 Heol Nantlais, Gorseinon, Swansea, SA4 4LS is a detached house on Heol Nantlais in Swansea. Stede's estimated value for November 2026 is £207,000. Four in five similar homes sold within their likely range when tested; for this property that range is £163,000 to £240,000. It combines their price per m² applied to its floor area (50%), its own last sale brought up to date with the House Price Index (25%) and recent sales of 80 similar homes in the same postcode sector (25%). The confidence score is 62 out of 100 (medium): estimates like this one are typically within 9% of the eventual sale price.
It last sold in June 1999 for £44,000. The current estimate is 370% higher than that price. The current owner has held it for about 27 years.
Its EPC energy-efficiency rating is band D (64 out of 100), with a potential of band B (87) after the recommended improvements. The certificate records a total floor area of 62 m² (667 sq ft). It was lodged in May 2021.
The modelled value is unchanged over the past year and up 16% over the past five years.
Among 10 nearby properties Stede tracks in the SA4 area, estimated values run from £185,000 to £237,000. This detached house's £207,000 sits around the middle of that range.
Common questions
How much is 21 Heol Nantlais, Gorseinon, Swansea, SA4 4LS worth?
Stede estimates 21 Heol Nantlais, Gorseinon, Swansea, SA4 4LS is worth £207,000 as of November 2026, within a likely range of £163,000 to £240,000. 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 21 Heol Nantlais, Gorseinon, Swansea, SA4 4LS last sell?
It last sold in June 1999 for £44,000.
What type of property is 21 Heol Nantlais, Gorseinon, Swansea, SA4 4LS?
It is recorded as a Detached house on Heol Nantlais in the SA4 postcode area.
What is the EPC rating of 21 Heol Nantlais, Gorseinon, Swansea, SA4 4LS?
21 Heol Nantlais, Gorseinon, Swansea, SA4 4LS has an EPC energy-efficiency rating of band D (64 out of 100). Its potential rating after the recommended improvements is band B (87). The certificate records a floor area of 62 m² (667 sq ft). EPC data is published by the Ministry of Housing, Communities & Local Government and reflects the most recent certificate on record.
How reliable is this estimate?
The confidence score is 62 out of 100 (medium). Tested against real sales of similar homes, estimates like this one are typically within 9% 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 their price per m² applied to its floor area (50%), its own last sale brought up to date with the House Price Index (25%) and recent sales of 80 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 50,831 real sales of similar homes.
- Recent price per m² in the same postcode sector, for its 62 m²£183,23150%
- Its sale in June 1999, brought up to today with the House Price Index£173,32525%
- 80 similar homes sold recently in the same postcode sector£287,16825%
Estimate £207,000, likely £163,000 – £240,000
Read the full methodology and data sources →