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Registered Address: 2 Leman St, London E1 8FA
SA1 4NNHouse Prices / Wales, Swansea, St. Helens Avenue
Last updated May 2026
Key Postcode Insights
SA1 4NN is a residential postcode situated on St. Helens Avenue, Swansea, SA1 with 44 addresses.
It ranks as the 1585th largest and 1441st most expensive of the 1,821 postcodes in the SA1 area. The dominant property type is a period house built between 1800 and 1911.
The postcode contains a total of 44 properties: 28 houses, 15 flats and 1 other property.
44
Properties
- Houses
- Flats
- Other (unknown)
Key Postcode Insights
SA1 4NN is a residential postcode situated on St. Helens Avenue, Swansea, SA1 with 44 addresses.
It ranks as the 1585th largest and 1441st most expensive of the 1,821 postcodes in the SA1 area. The dominant property type is a period house built between 1800 and 1911.
The postcode contains a total of 44 properties: 28 houses, 15 flats and 1 other property.
44
Properties
- Houses
- Flats
- Other (unknown)
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House Pricesin SA1 4NN
Sale prices range from £112,867 for 2 bedroom leasehold flats with a garden (510 ft2) to £219,675 for 4 bedroom freehold houses with a garden (1,345 ft2) .
Monthly rental prices range from £668 pcm for 2 bed flats to £960 pcm for 4 bed houses.
The gross rental yield is between 5.2% and 7.4%.
The average value per square foot is £177.
Average Sale Value
£173,018
Average Rental Value
£851 pcm
Average Rental Yield
5.9% /year
Average Value Per Sqft
£177 /ft2
Sales Market Trendsin SA1 4NN
The last sale in SA1 4NN sold for £175,000 on 5th November 2025. Since then prices are up an average of 3.4%.
The current average value in the postcode is £173,018.
The SA1 4NN Sales Market has increased by 44.8% over the last 10 years.
| Period | Year on Year | Average Price |
|---|---|---|
| April 2026 | 2.3% | £173,018 |
| April 2025 | 3.1% | £169,055 |
| April 2024 | 1.8% | £163,994 |
| April 2023 | 2.7% | £161,046 |
| April 2022 | 11.9% | £156,778 |
| April 2021 | 5.9% | £140,161 |
| April 2020 | 1.8% | £132,306 |
| April 2019 | 2.4% | £130,025 |
| April 2018 | 3.5% | £127,003 |
| April 2017 | 2.7% | £122,724 |
| April 2016 | 1.1% | £119,479 |
| April 2015 | 2.7% | £118,215 |
| April 2014 | 4.3% | £115,117 |
| April 2013 | 0.6% | £110,416 |
| April 2012 | -5.7% | £109,762 |
| April 2011 | -3% | £116,411 |
| April 2010 | 3.8% | £120,026 |
| April 2009 | -10.1% | £115,680 |
| April 2008 | -1.6% | £128,691 |
| April 2007 | 0% | £130,807 |
Rental Market Trendsin SA1 4NN
The current average rental value in the postcode is £851.
The SA1 4NN Rental Market has increased by 59.2% over the last 10 years.
| Period | Year on Year | Average Price |
|---|---|---|
| April 2026 | 3.9% | £851pcm |
| April 2025 | 3.7% | £819pcm |
| April 2024 | 7.4% | £790pcm |
| April 2023 | 7.6% | £735pcm |
| April 2022 | 13.6% | £683pcm |
| April 2021 | 6.1% | £601pcm |
| April 2020 | 2.5% | £567pcm |
| April 2019 | 0.8% | £553pcm |
| April 2018 | 0.7% | £549pcm |
| April 2017 | 2% | £545pcm |
| April 2016 | 2.1% | £534pcm |
| April 2015 | 1.7% | £523pcm |
| April 2014 | 1.4% | £514pcm |
| April 2013 | 0.8% | £507pcm |
| April 2012 | 0.7% | £503pcm |
| April 2011 | -0.9% | £500pcm |
| April 2010 | 0% | £504pcm |
| April 2009 | -5.9% | £504pcm |
| April 2008 | 4.6% | £536pcm |
| April 2007 | 0% | £512pcm |
Properties and Buildingsin SA1 4NN, St. Helens Avenue, Swansea, SA1
- Flat 3, Gabriel Lofts 70, St. Helens Avenue, Swansea, SA1 4NN
- 71, St. Helens Avenue, Swansea, SA1 Period building 2 units
- 72, St. Helens Avenue, Swansea, SA1 Period building 2 units
- 73, St. Helens Avenue, Swansea, SA1 4NN4 bed period house
- 74, St. Helens Avenue, Swansea, SA1 4NN3 bed house
- 75, St. Helens Avenue, Swansea, SA1 4NN4 bed period house
- 76, St. Helens Avenue, Swansea, SA1 Modern building 4 units
- 77, St. Helens Avenue, Swansea, SA1 Period building 2 units
- 78, St. Helens Avenue, Swansea, SA1 4NN4 bed period house
- 79, St. Helens Avenue, Swansea, SA1 4NN3 bed period house
- 80, St. Helens Avenue, Swansea, SA1 Modern building 3 units
- 81, St. Helens Avenue, Swansea, SA1 4NN3 bed period house
- 82, St. Helens Avenue, Swansea, SA1 4NN4 bed period house
- 83, St. Helens Avenue, Swansea, SA1 4NN4 bed period house
- 84, St. Helens Avenue, Swansea, SA1 4NN
- 85, St. Helens Avenue, Swansea, SA1 4NN
- 86, St. Helens Avenue, Swansea, SA1 4NN3 bed period house
- 87, St. Helens Avenue, Swansea, SA1 4NN3 bed period flat
- 88, St. Helens Avenue, Swansea, SA1 Modern building 2 units
- 89, St. Helens Avenue, Swansea, SA1 4NN3 bed period house
- 90, St. Helens Avenue, Swansea, SA1 4NN
- 91, St. Helens Avenue, Swansea, SA1 4NN3 bed period house
- 92, St. Helens Avenue, Swansea, SA1 4NN4 bed period house
- 93, St. Helens Avenue, Swansea, SA1 4NN3 bed period house
- 94, St. Helens Avenue, Swansea, SA1 4NN4 bed period house
- 95, St. Helens Avenue, Swansea, SA1 4NN3 bed period house
- 96, St. Helens Avenue, Swansea, SA1 4NN
- 97, St. Helens Avenue, Swansea, SA1 4NN3 bed period house
- 98, St. Helens Avenue, Swansea, SA1 4NN3 bed period house
- 99, St. Helens Avenue, Swansea, SA1 4NN4 bed period house
- 100, St. Helens Avenue, Swansea, SA1 4NN4 bed house
- 101, St. Helens Avenue, Swansea, SA1 4NN2 bed flat
- 102, St. Helens Avenue, Swansea, SA1 4NN
- 106, St. Helens Avenue, Swansea, SA1Building 2 units
Sales Historyin SA1 4NN
The last sale was on 5th November 2025 for £175,000 and since then the market in the area has increased by 3.4%. The postcode has had a total of 58 sales since 1995.
SA1 4NN has seen 5 sales in the last three years and 2 sales in the last twelve months.
Sold Nov 2025£175,000 | 3 Bed HouseSt. Helens Avenue74, St. Helens Avenue, Swansea, SA1 4NN
Sold Sep 2025£212,000 | 3 Bed HouseSt. Helens Avenue89, St. Helens Avenue, Swansea, SA1 4NN
Sold Aug 2024£155,000 | 3 Bed HouseSt. Helens Avenue97, St. Helens Avenue, Swansea, SA1 4NN
Sold Jul 2024£160,000 | 3 Bed HouseSt. Helens Avenue79, St. Helens Avenue, Swansea, SA1 4NN
Sold May 2023£178,000 | 3 Bed HouseSt. Helens Avenue74, St. Helens Avenue, Swansea, SA1 4NN
Sold Sep 2022£136,000 | 2 Bed FlatSt. Helens Avenue101, St. Helens Avenue, Swansea, SA1 4NN
Sold Aug 2022£250,000 | 3 Bed FlatSt. Helens Avenue87, St. Helens Avenue, Swansea, SA1 4NN
Sold Jul 2021£166,000 | 4 Bed HouseSt. Helens Avenue92, St. Helens Avenue, Swansea, SA1 4NN
Sold Nov 2020£145,000 | 4 Bed HouseSt. Helens Avenue75, St. Helens Avenue, Swansea, SA1 4NN
Sold May 2019£193,500 | 3 Bed HouseSt. Helens Avenue88A, St. Helens Avenue, Swansea, SA1 4NN
Sold Dec 2017£119,950 | 2 Bed FlatSt. Helens Avenue101, St. Helens Avenue, Swansea, SA1 4NN
Sold Nov 2017£137,750 | 2 Bed FlatSt. Helens Avenue101, St. Helens Avenue, Swansea, SA1 4NN
Sold Nov 2017£80,000 | 2 Bed FlatSt. Helens Avenue77A, St. Helens Avenue, Swansea, SA1 4NN
Sold Oct 2017£290,000 | 2 Bed FlatGabriel Lofts 70, St. Helens AvenueFlat 3, Gabriel Lofts 70, St. Helens Avenue, Swansea, SA1 4NN
Sold Mar 2017£95,000 | 3 Bed FlatSt. Helens Avenue77, St. Helens Avenue, Swansea, SA1 4NN
Sold Jun 2016£195,000 | 4 Bed HouseSt. Helens Avenue83, St. Helens Avenue, Swansea, SA1 4NN
Sold Aug 2015£105,000 | 4 Bed HouseSt. Helens Avenue82, St. Helens Avenue, Swansea, SA1 4NN
Sold Aug 2015£138,000 | 4 Bed HouseSt. Helens Avenue83, St. Helens Avenue, Swansea, SA1 4NN
Sold Jul 2015£90,000 | 2 Bed FlatSt. Helens Avenue76B, St. Helens Avenue, Swansea, SA1 4NN
Sold May 2015£159,200 | 3 Bed HouseSt. Helens Avenue76, St. Helens Avenue, Swansea, SA1 4NN
Sold Jan 2015£152,000 | 4 Bed HouseSt. Helens Avenue78, St. Helens Avenue, Swansea, SA1 4NN
Sold Aug 2014£149,000 | 3 Bed HouseSt. Helens Avenue89, St. Helens Avenue, Swansea, SA1 4NN
Sold May 2014£215,000 | 2 Bed FlatSt. Helens Avenue101, St. Helens Avenue, Swansea, SA1 4NN
Sold May 2014£80,000 | 2 Bed FlatSt. Helens Avenue77A, St. Helens Avenue, Swansea, SA1 4NN
Sold May 2014£95,000 | 3 Bed FlatSt. Helens Avenue77, St. Helens Avenue, Swansea, SA1 4NN
Sold Mar 2014£153,000 | 4 Bed HouseSt. Helens Avenue73, St. Helens Avenue, Swansea, SA1 4NN
Sold Oct 2013£40,000 | 3 Bed FlatSt. Helens Avenue80B, St. Helens Avenue, Swansea, SA1 4NN
Sold Jul 2013£140,000 | 3 Bed HouseSt. Helens Avenue86, St. Helens Avenue, Swansea, SA1 4NN
Sold Jul 2012£140,000 | 3 Bed HouseSt. Helens Avenue81, St. Helens Avenue, Swansea, SA1 4NN
Sold Dec 2011£132,500 | 3 Bed HouseSt. Helens Avenue91, St. Helens Avenue, Swansea, SA1 4NN
Sold May 2011£130,000 | 3 Bed HouseSt. Helens Avenue95, St. Helens Avenue, Swansea, SA1 4NN
Sold Jan 2010£116,800 | 4 Bed HouseSt. Helens Avenue75, St. Helens Avenue, Swansea, SA1 4NN
Sold Dec 2009£137,500 | 4 Bed HouseSt. Helens Avenue100, St. Helens Avenue, Swansea, SA1 4NN
Sold Mar 2009£134,000 | 3 Bed HouseSt. Helens Avenue79, St. Helens Avenue, Swansea, SA1 4NN
Sold Aug 2008£148,000 | 3 Bed HouseSt. Helens Avenue89, St. Helens Avenue, Swansea, SA1 4NN
Sold Jul 2008£158,000 | 4 Bed HouseSt. Helens Avenue83, St. Helens Avenue, Swansea, SA1 4NN
Sold May 2008£120,000 | 4 Bed HouseSt. Helens Avenue82, St. Helens Avenue, Swansea, SA1 4NN
Sold Dec 2007£195,000 | 3 Bed HouseSt. Helens Avenue88A, St. Helens Avenue, Swansea, SA1 4NN
Sold Nov 2007£165,000 | 4 Bed HouseSt. Helens Avenue80, St. Helens Avenue, Swansea, SA1 4NN
Sold Oct 2005£100,000 | 3 Bed FlatSt. Helens Avenue77, St. Helens Avenue, Swansea, SA1 4NN
Sold Jan 2005£150,000 | 3 Bed HouseSt. Helens Avenue74, St. Helens Avenue, Swansea, SA1 4NN
Sold Mar 2003£87,500 | 3 Bed HouseSt. Helens Avenue74, St. Helens Avenue, Swansea, SA1 4NN
Sold Aug 2002£46,000 | 2 Bed FlatSt. Helens Avenue77A, St. Helens Avenue, Swansea, SA1 4NN
Sold Apr 2002£55,000 | 3 Bed HouseSt. Helens Avenue85, St. Helens Avenue, Swansea, SA1 4NN
Sold Jan 2002£51,750 | 3 Bed FlatSt. Helens Avenue77, St. Helens Avenue, Swansea, SA1 4NN
Sold Nov 2001£41,500 | 3 Bed HouseSt. Helens Avenue93, St. Helens Avenue, Swansea, SA1 4NN
Sold Aug 2001£76,000 | 4 Bed HouseSt. Helens Avenue73, St. Helens Avenue, Swansea, SA1 4NN
Sold Mar 2000£62,000 | 4 Bed HouseSt. Helens Avenue73, St. Helens Avenue, Swansea, SA1 4NN
Sold Jan 2000£44,500 | 3 Bed FlatSt. Helens Avenue77, St. Helens Avenue, Swansea, SA1 4NN
Sold Dec 1999£69,950 | 4 Bed HouseSt. Helens Avenue83, St. Helens Avenue, Swansea, SA1 4NN
Sold Apr 1999£43,250 | 4 Bed HouseSt. Helens Avenue78, St. Helens Avenue, Swansea, SA1 4NN
Sold Jan 1999£51,000 | 3 Bed HouseSt. Helens Avenue95, St. Helens Avenue, Swansea, SA1 4NN
Sold Jul 1998£50,000 | 3 Bed HouseSt. Helens Avenue86, St. Helens Avenue, Swansea, SA1 4NN
Sold Sep 1997£55,000 | 3 Bed HouseSt. Helens Avenue74, St. Helens Avenue, Swansea, SA1 4NN
Sold May 1997£36,000 | 3 Bed HouseSt. Helens Avenue89, St. Helens Avenue, Swansea, SA1 4NN
Sold Apr 1997£55,000 | 4 Bed HouseSt. Helens Avenue75, St. Helens Avenue, Swansea, SA1 4NN
Sold Sep 1996£50,950 | 3 Bed HouseSt. Helens Avenue96, St. Helens Avenue, Swansea, SA1 4NN
Sold Jul 1995£51,000 | 3 Bed HouseSt. Helens Avenue79, St. Helens Avenue, Swansea, SA1 4NN
Nearby Postcodesto SA1 4NN
SA1 4NN is the 1585th largest and the 1441st most expensive postcode out of the 1,821 postcodes in the SA1 area.
- 49 mSA1 4NW, St. Helens Avenue, Swansea, SA1SA1 4NW46 Addresses
- 86 mSA1 4NP, Francis Street, Swansea, SA1SA1 4NP19 Addresses
- 98 mSA1 4LX, King Edward's Road, Swansea, SA1SA1 4LX20 Addresses
- 102 mSA1 4NH, Francis Street, Swansea, SA1SA1 4NH10 Addresses
- 108 mSA1 4LY, King Edward's Road, Swansea, SA1SA1 4LY1 Addresses
- 116 mSA1 4LN, King Edward's Road, Swansea, SA1SA1 4LN25 Addresses
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Property Typesin SA1 4NN
- 17 period houses built between 1800 and 1911
- 9 period flats built between 1800 and 1911
- 9 modern houses built after 1980
- 2 houses of an unknown age
- 1 flat of an unknown age
- 6 other addresses of unknown type
- period house (17)
- period flat (9)
- modern house (9)
- house (2)
- flat (1)
- Unknown (6)
Energy Efficiencyof properties in SA1 4NN
- Energy Performance Certificate (EPC) surveys conducted for 33 properties.
- The dominant rating is D.
- A (0)
- E (3)
- B (2)
- F (0)
- C (13)
- G (0)
- D (15)
- No EPC (10)
Top 3 Most Expensive Saleson St. Helens Avenue
- Sold Oct 2017£290,000 | 2 Bed FlatGabriel Lofts 70, St. Helens AvenueFlat 3, Gabriel Lofts 70, St. Helens Avenue, Swansea, SA1 4NN
- Sold Jul 2025£285,000 | 4 Bed HouseSt. Helens Avenue5, St. Helens Avenue, Swansea, SA1 4ND
- Sold Dec 2021£253,000 | 4 Bed HouseSt. Helens Avenue1, St. Helens Avenue, Swansea, SA1 4ND
Schools Nearbyto SA1 4NN
Public Transport Nearbyto SA1 4NN
The closest station to SA1 4NN is Swansea station which is 2.0 kilometres away.
- 2.0kmSwansea
- 6.3kmGowerton
- 7.6kmLlansamlet
- 9.7kmSkewen
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