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 18 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 £265,000 sits 74.3% 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
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.
£265,000
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 £1,136
Floor Area
162 m²
Street avg 150 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
3/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.







