Our Data Sources
18, Mark Street, Cardiff has no records in the Land Registry and a single entry in the EPC database dated October 2013.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 4 out of 5 and is considered of high accuracy.
Price Range & Condition
In very good condition, we estimate 18, Mark Street, Cardiff would be worth £311,258, with a potential rental value of £2,087 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £275,686, with a rental value of £1,849 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
18, Mark Street, Cardiff occupies a 184 m2 plot as recorded by HM Land Registry.
All 33 other houses in this postcode have recorded plot sizes, and this one ranks as the 19th largest.
Energy Efficiency
18, Mark Street, Cardiff has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 22 Oct 2013.
The property is not connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 80 sales of comparable properties within 410 metres of 18, Mark Street, Cardiff since 2014.
Most recently, 34, De Burgh Street, Cardiff, CF11 6LD, a freehold house, sold at £275,000 on the 28th January 2026.
Read more about house prices in CF11.
- Sold Jan 2026£275,000 | 4 Bed House34, De Burgh Street, Cardiff, CF11 6LD34, De Burgh Street, Cardiff, CF11 6LD
- Sold Sep 2025£250,000 | 4 Bed House49, Despenser Street, Cardiff, CF11 6AG49, Despenser Street, Cardiff, CF11 6AG
- Sold May 2025£265,000 | 4 Bed House48, Machen Place, Cardiff, CF11 6EQ48, Machen Place, Cardiff, CF11 6EQ
- Sold Apr 2025£339,000 | 4 Bed House18, Green Street, Cardiff, CF11 6LN18, Green Street, Cardiff, CF11 6LN
- Sold Mar 2025£250,000 | 4 Bed House72, De Burgh Street, Cardiff, CF11 6LD72, De Burgh Street, Cardiff, CF11 6LD
Nearby is defined as the radius comprising the nearest 2,000 addresses.
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Explore Nearby Properties
The surrounding properties have an average estimated value of £263,568, ranging from £97,896 to £326,277.
- 20 Mark Street
4 Bed House | 4 m | Est. Value: £286,982
- 22 Mark Street
4 Bed House | 11 m | Est. Value: £326,277
- 14 Mark Street
4 Bed House | 12 m | Est. Value: £307,833
- 12 Mark Street
3 Bed House | 19 m | Est. Value: £270,266
- 26 Mark Street
4 Bed House | 22 m | Est. Value: £286,982
Location Comparison
Our analysis of the public data ranks 18, Mark Street, Cardiff as the 11th largest and the 10th most expensive of the 35 addresses on Mark Street, Cardiff, CF11.
Against the CF11 postcode district average, it is £46k more expensive than the typical property.
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Schools Nearby
Public Transport Nearby
- Cardiff Central|700 m away
- Ninian Park|1.1 km away
- Cathays|1.1 km away
Available Internet Speeds
Ofcom's latest figures show superfast broadband available in this area.
According to recent data from Ofcom, Superfast Broadband available in this area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.












