30b, Cymmer Street, Cardiff, CF11 7AB
About 30b
30b is a mid-terrace house in Cardiff (CF11 7AB). It has a recorded floor area of 75 m² (around 807 sq ft) and construction records dating it to before 1900. At 75 m² this is the 12th smallest of 29 units on EPC record in the building, where floor areas span 32–175 m². The building's EPC ratings span F to C, with this unit at the top. The latest certificate (October 2021) shows a C (score 73). The rating has held steady at C across 2 certificates since August 2009. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Good to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 82).
Today's modelled estimate of £171,000 is 64.4% below the 2025 sale of £480,000, below the original sale price, which typically signals condition or completion-status changes worth verifying. On a £-per-square-foot basis, the last sale (£595/sq ft) was about 276% above the typical sold price in the postcode. A recent sale: £480,000 in June 2025. At 75 m² it's 20.3% smaller than the typical home in the postcode (94 m² median across 28 EPCs). Its energy rating outperforms most of the postcode (better than 86% of similar EPCs).
Everything you need to know about 30b
The true value, the hidden risks and the full sale history, in one report.
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The data behind every report
Energy performance
EPC Rating
Certificate validity
Valid until 21 October 2031
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
Wall insulation improved
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
30b has no planning applications on record.
But the area is active
8 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Latest sale on 30b was the highest on Land Registry record across the postcode.
£171,000
Modelled from EPC, postcode comparables.
£480,000
Recorded with HM Land Registry.
Sales timeline
25 June 2025Most recent
£480,000
Median price across the last 5 sales in CF11 7AB: £285,000 (2026–2023).
Nearby sales in CF11 7AB
Versus other Cymmer Street homes
Floor Area for 30b runs comfortably ahead of the street norm.
EPC Rating
73 (C)
Street avg 63 (D)
Floor Area
75 m²
Street avg 47 m²
CO₂ Emissions
2.2 t/year
Street avg 2.4 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
Everything you need to know about 30b
The true value, the hidden risks and the full sale history, in one report.
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One time fee only - money back guarantee
The data behind every report
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
362/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Cymmer Street — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.