How much is 18 Llandennis Avenue, Cardiff, CF23 6JG worth?
Estimated value — November 2026
£1,121,000
Likely range £876,000 – £1,322,000Four in five similar homes sold within their range when we tested it.
Latest recorded sale August 1997
60%
confidence
Medium
Typically within 10% of the sale price
Property details
Detached house
Llandennis Avenue · Cardiff · CF23 6JG
Energy performance
Mains Gas (Not Community) · EPC 8725-7822-3190-2287-4902 · inspected February 2015
Address
- District
- Cardiff
- County
- Cardiff
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 | £408,728 | £349,183 – £471,870 |
| 2001 | £463,942 | £392,273 – £536,976 |
| 2002 | £559,036 | £468,073 – £650,801 |
| 2003 | £635,116 | £527,207 – £740,961 |
| 2004 | £752,525 | £620,609 – £876,946 |
| 2005 | £751,452 | £615,599 – £876,105 |
| 2006 | £780,300 | £633,857 – £912,110 |
| 2007 | £797,119 | £641,874 – £935,146 |
| 2008 | £715,137 | £571,695 – £841,463 |
| 2009 | £723,655 | £575,922 – £855,316 |
| 2010 | £740,507 | £588,974 – £878,028 |
| 2011 | £753,705 | £598,238 – £898,472 |
| 2012 | £742,468 | £588,794 – £888,146 |
| 2013 | £758,479 | £665,115 – £835,076 |
| 2014 | £822,020 | £714,639 – £910,116 |
| 2015 | £847,951 | £730,792 – £944,069 |
| 2016 | £873,345 | £746,096 – £977,741 |
| 2017 | £904,282 | £765,710 – £1,017,967 |
| 2018 | £939,068 | £788,088 – £1,062,933 |
| 2019 | £958,150 | £796,882 – £1,090,456 |
| 2020 | £979,723 | £807,440 – £1,121,065 |
| 2021 | £1,057,232 | £863,351 – £1,216,293 |
| 2022 | £1,153,723 | £933,452 – £1,334,435 |
| 2023 | £1,118,369 | £896,420 – £1,300,458 |
| 2024 | £1,120,488 | £889,674 – £1,309,850 |
| 2025 | £1,123,662 | £883,726 – £1,320,508 |
| 2026 | £1,121,000 | £876,000 – £1,322,000 |
Sale history
Mortgage calculator
£6,016
Estimated monthly repayment
£1,008,900
Loan amount
£1,157,030
Total interest
£2,165,930
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
- 2 Llandennis Avenue, Cardiff, CF23 6JG£695,000 · 2012£1,020,000
- 6 Llandennis Avenue, Cardiff, CF23 6JG£780,000 · 2005£1,190,000
- The Paddock, 20A, Llandennis Avenue, Cardiff, CF23 6JG£2,000,000 · 2023£2,306,000
- 12 Llandennis Avenue, Cardiff, CF23 6JG£1,775,000 · 2021£1,950,000
- 8 Llandennis Avenue, Cardiff, CF23 6JG£1,622,000 · 2021£1,806,000
- 14 Llandennis Avenue, Cardiff, CF23 6JG£1,250,000 · 2007£1,792,000
About this property
18 Llandennis Avenue, Cardiff, CF23 6JG is a detached house on Llandennis Avenue in Cardiff. Stede's estimated value for November 2026 is £1,121,000. Four in five similar homes sold within their likely range when tested; for this property that range is £876,000 to £1,322,000. 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 98 similar homes in the same postcode sector (25%). The confidence score is 60 out of 100 (medium): estimates like this one are typically within 10% of the eventual sale price.
It last sold in August 1997 for £315,000. The current estimate is 256% higher than that price. The current owner has held it for about 29 years.
Its EPC energy-efficiency rating is band C (71 out of 100), with a potential of band B (85) after the recommended improvements. The certificate records a total floor area of 277 m² (2,982 sq ft). It was lodged in February 2015.
The modelled value is unchanged over the past year and up 8% over the past five years.
Among 6 nearby properties Stede tracks in the CF23 area, estimated values run from £1,020,000 to £2,306,000. This detached house's £1,121,000 sits toward the lower end of that range.
Common questions
How much is 18 Llandennis Avenue, Cardiff, CF23 6JG worth?
Stede estimates 18 Llandennis Avenue, Cardiff, CF23 6JG is worth £1,121,000 as of November 2026, within a likely range of £876,000 to £1,322,000. 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 18 Llandennis Avenue, Cardiff, CF23 6JG last sell?
It last sold in August 1997 for £315,000.
What type of property is 18 Llandennis Avenue, Cardiff, CF23 6JG?
It is recorded as a Detached house on Llandennis Avenue in the CF23 postcode area.
What is the EPC rating of 18 Llandennis Avenue, Cardiff, CF23 6JG?
18 Llandennis Avenue, Cardiff, CF23 6JG has an EPC energy-efficiency rating of band C (71 out of 100). Its potential rating after the recommended improvements is band B (85). The certificate records a floor area of 277 m² (2,982 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 60 out of 100 (medium). Tested against real sales of similar homes, estimates like this one are typically within 10% 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 98 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 56,151 real sales of similar homes.
- Recent price per m² in the same postcode sector, for its 277 m²£1,198,76750%
- Its sale in August 1997, brought up to today with the House Price Index£1,394,10125%
- 98 similar homes sold recently in the same postcode sector£693,09625%
Estimate £1,121,000, likely £876,000 – £1,322,000
Read the full methodology and data sources →