18 St Helens Avenue, Swansea, SA1 4ND
About 18 St Helens Avenue
18 St Helens Avenue is a four-bedroom mid-terrace house in Swansea (SA1 4ND). It has a recorded floor area of 162 m² (around 1744 sq ft), construction records dating it to before 1900 and council tax band E. The latest certificate (September 2019) shows a D (score 59), a step below the typical UK home. When first surveyed in July 2009 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Average to Good; while roof efficiency dropped from Poor to Very Poor. The recommended improvements would push it to C (score 75).
Held since January 2008 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Today's modelled estimate of £251,000 sits 65.1% above the 2008 sale of £152,000.
What this property has
Inside
- Bedrooms4
- Bathrooms1
Energy performance
18 St Helens Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Certificate validity
Valid until 4 September 2029
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Window efficiency improved
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has been extended more than once, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
18 St Helens Avenue has no planning applications on record.
But the area is active
44 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
The latest sale landed at the peak of the pre-credit-crunch market — a high-water reference point.
£251,000
Modelled from EPC, postcode comparables.
£152,000
Recorded with HM Land Registry.
Sales timeline
28 January 2008Most recent
£152,000
Median price across the last 5 sales in SA1 4ND: £252,000 (2025–2020).
Nearby sales in SA1 4ND
Versus other St Helens Avenue homes
18 St Helens Avenue is notably below the street on habitable rooms.
Price per m²
£938
Street avg £1,122
Floor Area
162 m²
Street avg 151 m²
Habitable Rooms
6 rooms
Street avg 7 rooms
CO₂ Emissions
6.8 t/year
Street avg 6.9 t/year
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The neighbourhood at a glance
Crime
580/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
St Helens Crescent — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







