11 Gelli Street, Port Tennant, Swansea, SA1 8NJ
About 11 Gelli Street
11 Gelli Street is a mid-terrace house in Port Tennant, Swansea, Swansea (SA1 8NJ). It has a recorded floor area of 88 m² (around 947 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (March 2016) shows a D (score 59), a step below the typical UK home. The recommended improvements would push it to C (score 69). The latest certificate is from March 2016, so improvements made since then won't be reflected.
Untraded for 25 years, with the last transfer in March 2001. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £130,000 sits 519% above the 2001 sale of £21,000. On a £-per-square-foot basis, the last sale (£22/sq ft) was about 78.5% below the postcode norm.
Everything you need to know about 11 Gelli Street
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 30 Mar 2026
EPC Rating
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
11 Gelli Street has no planning applications on record.
But the area is active
53 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
11 Gelli Street's modelled value sits at over four times its earliest registered sale price (2001).
£130,000
Modelled from EPC, postcode comparables.
£21,000
Recorded with HM Land Registry.
Sales timeline
15 March 2001Most recent
£21,000
Median price across the last 5 sales in SA1 8NJ: £127,000 (2025–2021).
Nearby sales in SA1 8NJ
35 Gelli Street, Port Tennant, Swansea, SA1 8NJ
Sold Jan 2025
£127,0003 Gelli Street, Port Tennant, Swansea, SA1 8NJ
Sold Sept 2024
£137,95040 Gelli Street, Port Tennant, Swansea, SA1 8NJ
Sold Aug 2024
£104,9509 Gelli Street, Port Tennant, Swansea, SA1 8NJ
Sold Jan 2024
£87,00037 Gelli Street, Port Tennant, Swansea, SA1 8NJ
Sold Oct 2021
£137,000
Versus other Gelli Street homes
11 Gelli Street is notably below the street on price per m².
Price per m²
£239
Street avg £1,257
Floor Area
88 m²
Street avg 86 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
4.2 t/year
Street avg 3.4 t/year
Everything you need to know about 11 Gelli Street
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

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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 Stephens Church — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.






