For sale Terraced

12 CASTLE STREET

SWANSEA, MUMBLES, SWANSEA SA3 4BH

2 beds 1 baths 969 sq ft Listed 19 May 2026 (-25d)

£425,000

Offers Over

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08-P1071584.jpg Lounge Photo 3 Kitchen/Breakfast Room Photo 5 Photo 6 14-P1071471.jpg Photo 8 Photo 9 Photo 10 Photo 11 Photo 12 Landing Shower Room Bedroom One Photo 16 Photo 17 Photo 18 Bedroom Two Photo 20 Another Aspect Rear Photo 23 Aerial Aspect Photo 25

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Property details

Tenure

FREEHOLD

Floor area

90 m²

Council tax band

D

EPC rating

D

Last sold

£110,000 Jan 2015

Price per m²

£4,722/m²

Local average

£274,533 (+54.8%)

Street crime

60 incidents within 1 mile (Apr 2026)

Key features

  • BEAUTIFULLY PRESENTED TWO BEDROOM TERRACED HOME
  • SET IN THE HEART OF THE SOUGHT AFTER VILLAGE OF MUMBLES
  • APPROXIMATELY 1,175 SQ FT OF WELL APPOINTED ACCOMMODATION
  • STYLISH KITCHEN AND BREAKFAST ROOM
  • SPACIOUS LOUNGE WITH A WARM AND WELCOMING FEEL
  • TWO GENEROUS DOUBLE BEDROOMS
  • CONTEMPORARY FIRST FLOOR SHOWER ROOM
  • LOW MAINTENANCE REAR GARDEN WITH PATIO SEATING AREA
  • CLOSE TO THE SEAFRONT, BEACHES, CAFÉS AND GOWER COASTLINE
  • EER RATING - TBC

Additional details

Garden
Yes

Description

Set within the ever popular seaside village of Mumbles, this attractive terraced home enjoys the best of coastal living with cafés, independent shops and the promenade all close at hand. Beautiful beaches and the wider Gower coastline are easily reached, while Swansea city centre remains conveniently accessible.

Presented to a very high standard throughout, the property offers stylish and well balanced accommodation extending to approximately 1,175 square feet. The ground floor comprises a porch, welcoming hallway, cloakroom, comfortable lounge and a well appointed kitchen and breakfast room designed for both everyday living and entertaining.

To the first floor are two generous double bedrooms and a contemporary shower room, all finished with a calm and carefully maintained feel.

Externally, the rear garden has been designed for low maintenance and enjoyment, bordered by walling and centred around a spacious patio seating area with ample room for outdoor dining and relaxation.

Set within grounds of approximately 0.5 acres, this is a thoughtfully presented home in one of Swansea Bay’s most sought after coastal locations.

Entrance - Via a frosted double glazed composite door into the porch.

Porch - Glazed hardwood door into the hallway. Tiled floor.

Hallway - Glazed hardwood door into the lounge. Glazed hardwood door into the kitchen/breakfast room. Hardwood door to the cloakroom.

Cloakroom - 1.294 x 0.879 (4'2" x 2'10" ) - Well appointed suite comprising; WC. Wash hand basin. Chrome heated towel rail. Tiled floor. Spotlights. Extractor fan.

Lounge - 3.566 x 3.45 (11'8" x 11'3" ) - You have a set of double glazed sash windows to the front. Radiator. Feature fireplace.





Kitchen/Breakfast Room - 10.857 x 4.034 (35'7" x 13'2" ) - Fantastic room with a feature wood burner set in fireplace. Stairs to the first floor. Set of bi-fold doors leading out to the rear garden. A beautifully appointed kitchen fitted with a range of base and wall units. Running work surface incorporating a double sink with mixer tap over. Four ring induction Bosch hob with extractor hood over. Integral Bosch oven and grill. Integral fridge. Integral freezer. Central breakfast island. Tiled floor.











First Floor -

Landing - Loft access. Door to shower room. Doors to bedrooms.

Shower Room - 3.698 x 2.095 (12'1" x 6'10" ) - With a frosted double glazed window to the side. Beautifully appointed suite comprising; a large walk-in shower with large oversized shower head above. WC. Wash hand basin. Radiator. Part tiled walls. Extractor fan.

Bedroom One - 4.020 x 5.813 (13'2" x 19'0" ) - With a set of double glazed windows to the rear. Velux roof window to the rear. Velux roof window to the side. Radiator. Doors to built-in wardrobes. Door to airing cupboard.







Bedroom Two - 4.107 x 3.504 (13'5" x 11'5" ) - With a double glazed sash window to the front. Feature fireplace. Radiator. Doors to built-in wardrobes.



External -

Another Aspect -

Aerial Aspect -



Front - Low-maintenance gravel garden.

Rear - Low maintenance rear garden bordered by wall comprising a patio seating area with ample room for tables and chairs.





Services - Mains electric. Mains sewerage. Mains water. Mains gas. Broadband type - full fibre. Mobile phone coverage available with EE, O2 Three & Vodafone.

Council Tax Band - Council Tax Band - D

Tenure - Freehold.

Listed by

Mumbles

Astley Residential Limited

Reference: 88676181

EPC Rating & Upgrade Cost

Current rating: D

Potential rating: C

Inspection date: 10/02/2022

Expiry date: 09/02/2032

Current heating cost: £609/year

Potential heating cost: £542/year

Est. upgrade cost to C: £19,675

Recommendations

  • Flat roof or sloping ceiling insulation (£850 - £1,500)
  • 50 mm internal or external wall insulation (£4,000 - £14,000)
  • Solar water heating (£4,000 - £6,000)
  • Solar photovoltaic panels, 2.5 kWp (£3,500 - £5,500)

View full EPC on gov.uk

Flood risk

Zone: 1

Risk: Low

Job (default Low)

Floorplans

Floorplan.jpg

Floorplan.jpg

Price history

-37% since 2012

Event Date Price % change
Listed for sale — £425,000 +286.4%
Sold 23/01/2015 (11 years ago) £110,000 -37.1%
Sold 26/01/2012 (14 years ago) £175,000 —

Source: HM Land Registry Price Paid Data. Crown copyright.

Sold Comparables

Same street and nearby sales within 0.25 miles (last 5 years). Data from Land Registry Price Paid.

Address Price Date Type
12 CASTLE SQUARE, MUMBLES, SWANSEA, SA3 4BJ £208,000 21/11/2025 Terraced
2 WINDSOR PLACE, MUMBLES, SWANSEA, SA3 4LG £240,000 19/11/2025 Terraced
Same street 16 CASTLE STREET, MUMBLES, SWANSEA, SA3 4BH £260,000 31/10/2025 Terraced
11 KINGS ROAD, MUMBLES, SWANSEA, SA3 4AJ £280,000 23/07/2025 Terraced
Same street 14 CASTLE STREET, MUMBLES, SWANSEA, SA3 4BH £387,500 12/02/2024 Terraced
6 CHAPEL STREET, MUMBLES, SWANSEA, SA3 4NH £340,000 09/10/2023 Terraced
Same street 11 CASTLE STREET, MUMBLES, SWANSEA, SA3 4BH £325,000 27/09/2023 Terraced
4 GOWER PLACE, MUMBLES, SWANSEA, SA3 4AB £271,000 20/09/2023 Terraced
8 QUEENS ROAD, MUMBLES, SWANSEA, SA3 4AN £280,000 16/08/2023 Terraced
4 VICTORIA AVENUE, MUMBLES, SWANSEA, SA3 4NQ £285,000 04/08/2023 Terraced
15 QUEENS ROAD, MUMBLES, SWANSEA, SA3 4AW £240,000 27/04/2023 Terraced
22 CHAPEL STREET, MUMBLES, SWANSEA, SA3 4NH £461,000 28/11/2022 Terraced
57 NEWTON ROAD, MUMBLES, SWANSEA, SA3 4BL £325,000 25/11/2022 Terraced
14 GOWER PLACE, MUMBLES, SWANSEA, SA3 4AB £392,500 14/11/2022 Terraced
3 CASTLE SQUARE, MUMBLES, SWANSEA, SA3 4BJ £290,000 28/10/2022 Terraced
8 DUNNS LANE, MUMBLES, SWANSEA, SA3 4AA £300,000 22/09/2022 Terraced
Same street 2 CASTLE STREET, MUMBLES, SWANSEA, SA3 4BH £341,000 13/09/2022 Terraced
4 DUNNS CLOSE, MUMBLES, SWANSEA, SA3 4AF £325,000 12/08/2022 Terraced
20 WOODVILLE ROAD, MUMBLES, SWANSEA, SA3 4AD £345,000 12/08/2022 Terraced
114 CASTLE ROAD, MUMBLES, SWANSEA, SA3 5TA £480,000 10/08/2022 Terraced
43 GLOUCESTER PLACE, MUMBLES, SWANSEA, SA3 4LF £95,000 23/06/2022 Terraced
5 WINDSOR PLACE, MUMBLES, SWANSEA, SA3 4LG £295,000 10/06/2022 Terraced
22 VICTORIA AVENUE, MUMBLES, SWANSEA, SA3 4NG £330,000 07/06/2022 Terraced
42 OAKLAND ROAD, MUMBLES, SWANSEA, SA3 4AH £445,000 27/05/2022 Terraced

Street average: £328,375 (4 sales)

Area average: £311,375 (20 sales)

Capital growth trend

Land Registry outcode average: last 12 months vs 5y and 10y ago (from sold prices).

5y growth -34.4%
10y growth 38.9%

House Price Index (HM Land Registry — official index, not sold-price averages): Swansea. Series: Terraced. As of March 2026.

1y (index) 1.9%
5y (index) 26.7%
10y (index) 58.9%

Rental Range

Estimated market rent for Swansea. Low = conservative, Realistic = average, Optimistic = best case.

Low £752/mo
Realistic £835/mo
Optimistic £919/mo

Based on Local Authority from postcode lookup → Swansea.

Location

Map view View on Google Maps View on OpenStreetMap Street View SA3 4BH

Nearby

Nearest stations, universities and amenities (distance from property).

Type Name Distance
Shop Ruby Nails and Spa 0.0 miles
Shop Gemma Davies 0.0 miles
Bus stop Oystermouth RBL Club 0.1 miles
Bus stop Castle Avenue 0.1 miles
Hospital Gower Physiotherapy Clinic 1.8 miles
University Swansea University 4.0 miles
Train station Swansea 4.3 miles
Train station Gowerton 5.2 miles

Street-level crime

Category Count
Violence and sexual offences 22
Anti-social behaviour 9
Public order 9
Criminal damage and arson 6
Other theft 5
Vehicle crime 3
Shoplifting 2
Bicycle theft 1
Burglary 1
Drugs 1
Other crime 1
Total incidents 60

Within 1 mile during Apr 2026. Source: data.police.uk (England & Wales).

Schools nearby

Nearest open schools with Ofsted ratings (England). Closed schools are not shown. Data from Get Information about Schools and Ofsted.

Name Type Distance Ofsted
Oystermouth Primary School Other 0.0 miles — (No rating)
Grange Primary School Other 0.5 miles — (No rating)
St David's Catholic Primary School Other 0.5 miles — (No rating)
Newton Primary School Other 0.5 miles — (No rating)
Y.G.G. Llwynderw Other 0.6 miles — (No rating)

Rental Comparables

Residential lets from OpenRent and Rightmove for the area (same bedroom count). Use to validate rent estimates. Student lets are excluded.

Title Rent Beds Distance As seen on
2 Bed Penthouse, Newton Road, SA3 £1,000/mo 2 0.03 miles OpenRent
2 Bed Terraced House, Castle Square, SA3 £1,200/mo 2 0.07 miles OpenRent
2 Bed Flat, Oystermouth Court, SA3 £995/mo 2 0.2 miles OpenRent
2 Bed Terraced House, Park Street, SA3 £2,600/mo 2 0.22 miles OpenRent
2 Bed Flat, Parkside, SA3 £975/mo 2 0.27 miles OpenRent
2 Bed Maisonette, Mumbles Road, SA3 £1,200/mo 2 0.4 miles OpenRent
2 Bed Terraced House, Hatherleigh Drive, SA3 £995/mo 2 0.58 miles OpenRent

Average rent: £1,281/mo (7 listings)

Rent-driven metrics

Based on OpenRent comparables.

Rent ratio 0.24%
Max investor price (0.8%) £125,000
Target investor price (1%) £100,000
Gross yield 2.8%
Cost-to-rent ratio 35.4×
Monthly cashflow £-799/mo 75% LTV, 3.95% APR (5yr fixed), 25yr term
Cash-on-cash ROI -7.8%
  • Rent ratio — Monthly rent ÷ purchase price (1% rule). 1%+ = strong, 0.8–1% = okay, <0.8% = weak for cashflow.
  • Max investor price — Rent ÷ 0.8%; the price at which rent would be 0.8% of price (Stoke-style target).
  • Target investor price — Rent ÷ 1%; the price at which rent would be 1% of price (strong cashflow band).
  • Gross yield — Annual rent as % of purchase price (no costs).
  • Cost-to-rent — Price ÷ annual rent (from OpenRent comparables). Under 14× = strong, 14–16× = acceptable, 17×+ = compressed.
  • Cashflow — Rent minus mortgage, 10% maintenance, £25/mo compliance. Assumes 75% LTV, 3.95% APR (5yr fixed), 25yr term.
  • ROI — Annual profit ÷ cash in (deposit + 4% purchase costs).
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