27 St Helens Avenue, Swansea, SA1 4ND
About 27 St Helens Avenue
27 St Helens Avenue is a mid-terrace house in Swansea (SA1 4ND). It has a recorded floor area of 165 m² (around 1776 sq ft), construction records dating it to 1900-1929 and council tax band E. The latest certificate (July 2019) shows an E (score 53), well below the UK norm with real room to improve. When first surveyed in November 2018 the rating was F, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Average to Good; while lighting dropped from Very Good to Good. The recommended improvements would lift it to B (score 81), a 3-band jump.
It lags the bulk of the postcode on energy efficiency (less efficient than 75% of similar EPCs). Across 1998–2019, sale prices on this property compounded at 4.8% per year. Today's modelled estimate of £270,000 is 35% above the 2019 sale price. On a £-per-square-foot basis, the last sale (£113/sq ft) was about 20.5% above the typical sold price in the postcode. Most recent transfer: January 2019 at £200,000.
Everything you need to know about 27 St Helens Avenue
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
27 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 changed
Hot water 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
27 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
27 St Helens Avenue has more than doubled in price since the earliest registered sale in 1998.
£270,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.8% per year over 21 years.
£200,000
Growth on file: 4.8% per year over 21 years.
Sales timeline
11 January 2019Most recent
£200,000
+166.7%over 21 years8 January 1998
£75,000
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
On co₂ emissions, 27 St Helens Avenue runs well behind the street norm.
Price per m²
£1,212
Street avg £1,123
Floor Area
165 m²
Street avg 149 m²
Habitable Rooms
8 rooms
Street avg 7 rooms
CO₂ Emissions
8.1 t/year
Street avg 6.9 t/year
Everything you need to know about 27 St Helens Avenue
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee
The data behind every report
Similar properties nearby
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.