21 Gelli Street, Port Tennant, Swansea, SA1 8NJ is a freehold terraced property built between 1900-1929. The property offers approximately 947 square feet of living space. In this location, properties of similar size usually have three bedrooms.

The estimated current market value of the property is £172,592 , which equates to approximately £182 per square foot. It was last sold on 31 Aug 2007 for £114,000. Since then, the value has increased by £58,592, representing a 51.4% increase, or approximately 2.8% per year.

The current estimated value of £172,592 is:

  • 23.8% higher than the average property price on Gelli Street
  • 22.6% higher than the average in the SA1 8NJ postcode area
  • and 29.2% lower than the average price for Swansea as a whole

This property has had 2 EPC inspections with recorded tenure information. It was recorded once as rented and once as owner-occupied, indicating a change in how it was used over time.

At the most recent EPC inspection on 26 September 2025, the property was recorded as rented.

View sold house prices in SA1 8NJ

Building approximate location

About Property

Type
Terraced House
Built
1900-1929
Interior Size
947 sq ft
Tenure
Freehold
Price (estimate)
£172,592
Price Per sq ft (estimate)
£182
Bedroom Count (estimate)
3 bedrooms

EPC Summary

21 Gelli Street, Port Tennant, Swansea, SA1 8NJ has an Energy Performance Certificate (EPC) rating of C, based on the latest assessment carried out on 26 Sep 2025.

This property uses a gas-fired boiler and radiators, connected to the mains gas supply, as its main heating source. Hot water is provided from main heating system. The windows are fully double glazed.

The previous EPC assessment was conducted on 5 Sep 2015, when the property was rated D. Since then, the rating has improved to C, with the energy efficiency score increasing by 9.5%.

Since the previous assessment, several changes were observed:

  • The roof construction or insulation changed from pitched, 200 mm loft insulation to pitched, 100 mm loft insulation, changing energy efficiency from good to average.
  • The wall construction or insulation changed from granite or whinstone, as built, no insulation (assumed) to sandstone, as built, no insulation (assumed), improving energy efficiency from very poor to poor.
  • The lighting was updated from low energy lighting in 60% of fixed outlets to excellent lighting efficiency, with efficiency improving from good to very good.
Heating Type
Boiler and radiators, mains gas
Good
Hot Water
From main system
Good
Roof
Pitched, 100 mm loft insulation
Average
Walls
Sandstone, as built, no insulation (assumed)
Poor
Windows
Fully double glazed
Poor
Lighting
Excellent lighting efficiency
Very Good

Compared to SA1 8NJ

5 th / 14
Price Rank
23% higher than average
6 th / 13
Size Rank
2% bigger than average
5 th / 13
Price Per Sq FT Rank
20% higher than average

Compared to other properties in SA1 8NJ , this house's estimated value ranks 5th out of 14. Based on price per square foot, it ranks 5th out of 13 properties. In terms of size, this home ranks 6th out of 13 properties in its postcode area.

Sale History

Today
£172,592
streetscan.co.uk estimate
+51 %
31 Aug 2007
£114,000
Leasehold
+29.6 %
13 Oct 2006
£87,950
Leasehold

Area Insights

Similar Properties Sold Nearby

rooms: 4
size: 850 sq ft
sale price: £127,000
sale date: 13 Jan 2025
rooms: 5
size: 1033 sq ft
sale price: £137,950
sale date: 13 Sep 2024
rooms: 4
size: 818 sq ft
sale price: £104,950
sale date: 9 Aug 2024
rooms: 4
size: 1066 sq ft
sale price: £87,000
sale date: 15 Jan 2024
rooms: 4
size: 807 sq ft
sale price: £137,000
sale date: 8 Oct 2021

Data Sources

The property at 21 Gelli Street, Port Tennant, Swansea, SA1 8NJ appears two times in the Land Registry records, with the latest transaction recorded on 31 Aug 2007. It also has two Energy Performance Certificates (EPC) entries, the earliest dating back to 26 Sep 2025. We use this data, to estimate the property's characteristics and current market value.

This website uses public sector information from:

These datasets are licensed under the Open Government Licence v3.0.
This website is not affiliated with or endorsed by HM Land Registry or DLUHC.


Disclaimer: StreetScan.co.uk makes all reasonable efforts to ensure the information provided on this website is current and accurate; however, no warranties or representations are made as to its completeness or accuracy. StreetScan.co.uk expressly disclaims any and all liability for any loss, damage, or expense arising directly or indirectly from the use of, or reliance upon, such information.