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12 Gelli Street, Port Tennant, Swansea, SA1 8NJ

Property type
Mid terrace
Floor Ground
Habitable rooms
2
From EPC
Floor area
43 m²
463 sq ft
Energy rating
D
Score 62
Council tax
Band A
Tenure
Private Rental
Overview

About 12 Gelli Street

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

12 Gelli Street is a mid-terrace house in Port Tennant, Swansea, Swansea (SA1 8NJ). It has a recorded floor area of 43 m² (around 463 sq ft), construction records dating it to 1900-1929 and council tax band A. At 43 m² this is the smallest unit on EPC record across the building (43–106 m²). The building's EPC ratings span E to C across 38 units on file. The latest certificate (August 2020) shows a D (score 62), on the cusp of jumping into the C band. The rating has held steady at D across 4 certificates since June 2010. Between certificates, window efficiency went from Very Poor to Average. The recommended improvements would push it to C (score 74).

At 43 m² it sits well below the postcode median (81 m² across 37 EPCs), making it one of the more compact homes locally.

Before you decide

Everything you need to know about 12 Gelli Street

The true value, the hidden risks and the full sale history, in one report.

Signs of HMO activity in the areaLarger development activity nearby

Pick your report · every report is £14.99

One time fee only - money back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Current Certificate(1 of 4)
Aug 2020

EPC Rating

A
B
C
D
D62
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
2.3 t/year
Occupancy
Rented

Property Improvements

Changes detected from historical EPC data

Jan 2011from Jun 2010
EPC improved fromD63toF34
Heating System
Gas BoilerStorage Heaters

Heating system changed

Main Fuel
GasElectric

Changed to a more efficient fuel source

Hot Water
Main SystemImmersion (Off-Peak)

Hot water system changed

Windows
SingleFull Double

Single glazing replaced with double or better glazing

Low Energy Lighting
100%17%

Low energy lighting percentage decreased

Aug 2017from Jan 2011
EPC improved fromF34toD57
Heating System
Storage HeatersGas Boiler

Replaced storage heaters with gas boiler

Main Fuel
ElectricGas

Connected to mains gas supply

Hot Water
Immersion (Off-Peak)Main System

Hot water system upgraded

Low Energy Lighting
17%40%

More low energy lighting installed

Aug 2020from Aug 2017
Hot Water
Very GoodGood

Hot water efficiency decreased

Low Energy Lighting
40%100%

More low energy lighting installed

SDL Surveying

Get a survey for this property

Level 3 Building Survey

Victorian-eraGround Floor FlatEPC DPre-1919 buildExtended multiple times (2+ extensions)

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 £820 · Includes VAT

Planning

Planning history

Applications and permits filed against 12 Gelli Street, Port Tennant, Swansea, SA1 8NJ, sourced from the PlanIt planning register.

12 Gelli Street has no planning applications on record.

53

But the area is active

53 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.

Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.

12 Gelli Street has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.

Current estimate

£112,000

Modelled from EPC, postcode comparables.

See how we calculated this

No sales recorded with HM Land Registry

That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.

Median price across the last 5 sales in SA1 8NJ: £127,000 (2025–2021).

On the street

Versus other Gelli Street homes

Four headline reads against 6 similar flats on this street, drawn from the latest EPC and Land Registry data.

12 Gelli Street outperforms the street on co₂ emissions by a wide margin.

EPC Rating

62 (D)

Street avg 63 (D)

Strongly below

Floor Area

43 m²

Street avg 51 m²

Strongly below

CO₂ Emissions

2.3 t/year

Street avg 2.6 t/year

Strongly above

Habitable Rooms

2 rooms

Street avg 2 rooms

On par
Before you decide

Everything you need to know about 12 Gelli Street

The true value, the hidden risks and the full sale history, in one report.

Signs of HMO activity in the areaLarger development activity nearby

Pick your report · every report is £14.99

One time fee only - money back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£120k

1 Dupre Road, St Thomas

SA1 8HB

£123k

1 Canaan Row, St Thomas

SA1 8EQ

£127k

1 Ivy Bush Court, St Thomas

SA1 8DQ

£131k

1 Grenfell Park Road, St Thomas

SA1 8EY

£139k

1 George Powell House, Balaclava Street, St Thomas

SA1 8BR

£143k

1 Bay Street, Port Tennant

SA1 8LB

£148k

1 Balaclava Street, St Thomas

SA1 8BS

4 bed1 bath
£154k

1 Beaumont Crescent, St Thomas

SA1 8DW

Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Swansea district page.
Full Swansea report

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.

FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 12 Gelli Street, Port Tennant, Swansea, SA1 8NJ. Each answer is also embedded as structured data for search engines.