21 Brynteg, Clydach, Swansea, SA6 5DS
About 21 Brynteg
21 Brynteg is a semi-detached house in Clydach, Swansea, Swansea (SA6 5DS). It has a recorded floor area of 96 m² (around 1033 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (October 2021) shows a C (score 70). When first surveyed in October 2009 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Poor to Good, lighting went from Average to Very Good and main heating went from Average to Good; while wall efficiency dropped from Good to Average. The recommended improvements would push it to B (score 82).
It hasn't traded since January 2010, a hold of 16 years that's notably long for the area. Today's modelled estimate of £158,000 sits 125.9% above the 2010 sale of £69,950. On a £-per-square-foot basis, the last sale (£68/sq ft) was about 33.5% below the postcode norm. One planning record on file: an extension approved in 2026. Past consents include an extension, meaningful when judging how the property has evolved. At 96 m² it's 16% larger than the typical home in the postcode (83 m² median across 24 EPCs). Its energy rating outperforms most of the postcode (better than 79% of similar EPCs).
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
Low energy lighting percentage decreased
Hot water efficiency decreased
Heating controls upgraded for better temperature management
Hot water efficiency improved
Window efficiency improved
More low energy lighting installed
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Planning history
21 Brynteg has an approved rear extension on the planning record.
1 application on record at 21 Brynteg, Clydach, Swansea, SA6 5DS
- Jan 2026ExtensionFullOutcome in report
Extension: Rear of property
Rear W/C extension with ramped access to front entrance.
- Documents
- 14 docs on file
- Reference
- 2025/2409/FUL
Unlock 21 Brynteg, Clydach, Swansea, SA6 5DS's full planning history
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- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 2 notable nearby
- The 14 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
21 Brynteg valuation sits well clear of the typical sold price in this postcode.
£158,000
Modelled from EPC, postcode comparables.
£69,950
Recorded with HM Land Registry.
Sales timeline
18 January 2010Most recent
£69,950
Median price across the last 5 sales in SA6 5DS: £145,000 (2025–2022).
Nearby sales in SA6 5DS
Versus other Brynteg homes
Floor Area for 21 Brynteg runs comfortably ahead of the street norm.
Price per m²
£729
Street avg £1,285
Floor Area
96 m²
Street avg 85 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
3.1 t/year
Street avg 4.0 t/year
Similar properties nearby
The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Graig Felen School — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







