Sold Terraced

15 CASTLE STREET

SWANSEA, MUMBLES, SWANSEA SA3 4BH

3 beds 1 baths 1,055 sq ft Listed 5 Oct 2018 (-2801d)

£250,000

Offers Over

Reduced on 1 Feb 2019

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# 3 bedroom terraced house for sale (SA3 4BH)

## Property Details

| Key | Value |
|-----|-------|
| Address | 15 CASTLE STREET, SWANSEA, MUMBLES, SWANSEA SA3 4BH |
| Price | £250,000 |
| Bedrooms | 3 |
| Bathrooms | 1 |
| Construction age | England and Wales: 1900-1929 |
| Floor area | 98 m² |
| Last sold | £235,000 Oct 2019 |

## EPC Rating & Upgrade Cost

- **Current rating:** E
- **Potential rating:** C
- **Current heating cost:** £995/year

### Recommendations
- A2 (1,500)
- A3 (2,700)
- B (1,500)
- Q (14,000)
- E (25)
- N (6,000)
- U (8,000)

[View full EPC on gov.uk](https://find-energy-certificate.service.gov.uk/energy-certificate/9898-6963-6200-4168-6924)

## Description

**SUMMARY**

**DESCRIPTION**

A beautifully presented traditional three bedroom home with the added benefit of a loft room. Located in the heart of the popular seaside village of Mumbles, and within a short walking distance to the town where you can take advantage of all the local amenities, the seafront, pier and transport links. The property briefly comprises; entrance hall, lounge, kitchen open to dining area, utility and downstairs bathroom. To the first floor you have the three bedrooms and a spiral staircase leading to the loft room. Externally to the front of the home there is resident permit parking there is a generous rear garden with a large outside shed. Viewing is highly recommended to appreciate the convenient location and home on offer.

**Entrance Hall **

Door to lounge

**Lounge ** 13' 4" Into Bay max  x 13' 5" Max ( 4.06m Into Bay max  x 4.09m Max )

Bay window to front, carpeted, fireplace with a wood burner. Fitted shelving in alcove, radiator and door to;

**Dining Room** 11' 2" x 13' 5" Max Alcove  ( 3.40m x 4.09m Max Alcove  )

Fitted shelving in alcove, radiator, carpeted and stairs to the first floor. Leading on to an opening to the kitchen.

**Kitchen** 12' 2" Max  x 12' 5" Max ( 3.71m Max  x 3.78m Max )

Fitted with matching wall and base units, Induction hob, eye level electric oven. Stainless steel built under sink with stainless steel tap. Plumbing for washing machine. Skylight velux window. Patio door to rear garden and hallway leading to utility space and downstairs bathroom. Tiled flooring

**Utilty Space **

Tiled flooring, door to rear garden and bathroom.

**Bathroom **

Fitted with a three piece suite including a pedestal sink, Wc and paneled bath with shower over. Radiator, tiled flooring and windows to side and rear

**Landing **

Wooden floorboards, doors to bedrooms, spiral staircase to loft room

**Bedroom One** 11' 2" x 12' 3" ( 3.40m x 3.73m )

Wooden floorboards, window to front, traditional fire surround, radiator and fitted storage cupboards

**Bedroom Two** 11' 3" x 8' 3" Max alcove  ( 3.43m x 2.51m Max alcove  )

Carpet, window to rear and radiator

**Bedroom Three** 9' 2" x 7' 1" ( 2.79m x 2.16m )

Wall mounted boiler, carpeted. radiator and window to rear

**Loft Room** 9' 8" Max  x 11' 6" Max ( 2.95m Max  x 3.51m Max )

Windows to the front and rear, carpeted and radiator.

**External**

Lawned garden with a patio section. Large storage shed and rear access. The rear bedrooms and garden offer views of Oystermouth Castle.

## Property Photos

- ![Photo](/listings/photos/76157186/616899)
- ![Photo](/listings/photos/76157186/616900)
- ![Photo](/listings/photos/76157186/616903)
- ![Photo](/listings/photos/76157186/616904)
- ![Photo](/listings/photos/76157186/616906)
- ![Photo](/listings/photos/76157186/616909)
- ![Photo](/listings/photos/76157186/616912)
- ![Photo](/listings/photos/76157186/616914)
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- ![Photo](/listings/photos/76157186/616917)
- ![Photo](/listings/photos/76157186/616918)
- ![Photo](/listings/photos/76157186/616919)

## Floorplans

- ![Floorplan 1](/listings/photos/76157186/616920) - Floorplan 1

## EPC Graphs

- ![EPC](/listings/photos/76157186/616921) - EPC

## FENSA Certificates

This property has 1 FENSA certificate(s) on record.

### FENSA Certificate #2874255
- **Address:** 15 Castle Street, Mumbles, SA3 4BH
- **Certificate Issued:** 18/07/2005
- **Work Completed:** 20/06/2005
- **Items:** 2 window(s)

## Sales History

*Recorded sales for this property. Data from Land Registry Price Paid.*

| Address | Price | Date | Type |
|---------|-------|------|------|
| 15 CASTLE STREET, MUMBLES, SWANSEA, SA3 4BH | £235,000 | 29/10/2019 | Terraced |

## Sold Comparables

*Same street and nearby sales within 0.25 miles. Data from Land Registry Price Paid. Last 5 years.*

| 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 |
| 23 OAKLAND ROAD, MUMBLES, SWANSEA, SA3 4AQ | £456,500 | 18/03/2025 | 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 |
| 3 OAKLAND ROAD, MUMBLES, SWANSEA, SA3 4AQ | £396,000 | 06/10/2022 | 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 |
| 7 OAKLAND ROAD, MUMBLES, SWANSEA, SA3 4AQ | £447,756 | 16/08/2022 | 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 |
| 35 LANGLAND ROAD, MUMBLES, SWANSEA, SA3 4LX | £455,000 | 29/07/2022 | Terraced |

**Street average:** £328,375 (4 sales)
**Area average:** £340,888 (20 sales)

## Price vs local average

*Outcode + property type (HousePrices, last 2 years).*

- **Local average:** £274,533 (15 Terraced, SA3, 2024–2026)
- **Deviation:** -8.9%

## Rental Range

*ONS Price Index of Private Rents (Swansea). Low / Realistic / Optimistic = conservative / average / best case.*

- **Low:** £752/mo
- **Realistic:** £835/mo
- **Optimistic:** £919/mo

## 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 |
|------|------|------|------|------|
| 3 Bed Semi-Detached House, Victoria Avenue, SA3 | £2,500/mo | 3 | 0.07 miles | OpenRent |
| 3 Bed Detached House, Victoria Avenue, SA3 | £2,800/mo | 3 | 0.07 miles | OpenRent |
| 3 Bed Flat, Mumbles, SA3 | £1,300/mo | 3 | 0.07 miles | OpenRent |
| 3 Bed Semi-Detached House, Queens Rd, SA3 | £2,850/mo | 3 | 0.11 miles | OpenRent |
| 3 Bed Terraced House, Gloucester Place, SA3 | £1,250/mo | 3 | 0.19 miles | OpenRent |
| 3 Bed Terraced House, Oakland Road, SA3 | £1,550/mo | 3 | 0.22 miles | OpenRent |
| 3 Bed Detached House, Beaufort Close, SA3 | £1,850/mo | 3 | 0.5 miles | OpenRent |
| 3 Bed Bungalow, Highmead Avenue, SA3 | £2,800/mo | 3 | 0.62 miles | OpenRent |

**Average rent: £2,113/mo (8 listings)**

## 1% Rule

- **Rent ratio:** 0.87% (okay)
- **Max investor price (0.8%):** £271,875
- **Target investor price (1%):** £217,500

*Monthly rent ÷ price. 1%+ = strong, 0.8–1% = okay, <0.8% = weak. Max investor price = rent ÷ 0.8% (Stoke-style target). Target investor price = rent ÷ 1% (strong cashflow band). Based on OpenRent comparables.*

## Rent-driven metrics

*Based on OpenRent comparables (median £2,175/mo).*

- **Gross yield:** 10.4%
- **Cost-to-rent:** 9.6×
- **Monthly cashflow:** £948/mo (75% LTV, 3.95% APR (5yr fixed), 25yr term)
- **Cash-on-cash ROI:** 15.7%

*Gross yield = annual rent as % of price (no costs). Cost-to-rent = price ÷ annual rent (from OpenRent comparables); under 14× = strong, 14–16× = acceptable, 17×+ = compressed. Cashflow = rent − 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).*

## Price per Square Metre

- **£/m²:** £2,551/m²

## Capital growth trend

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

- **5y growth:** -16.6%
- **10y growth:** 52.4%

## House Price Index (HM Land Registry)

*Official index for Swansea; Terraced series; as of March 2026.*

- **1y growth (index):** 1.9%
- **5y growth (index):** 26.7%
- **10y growth (index):** 58.9%

## Flood risk

- **Zone:** 1
- **Risk:** Low
- **Source:** Job (default Low)

[Check long-term flood risk (GOV.UK)](https://check-long-term-flood-risk.service.gov.uk/postcode)

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Property details

Tenure

FREEHOLD

Floor area

98 m²

EPC rating

Year built

England and Wales: 1900-1929

Last sold

£235,000 Oct 2019

Price per m²

£2,551/m²

Local average

£274,533 (-8.9%)

Street crime

42 incidents within 1 mile (Mar 2026)

Key features

Three Bedroom
Loft Room
Modern Kitchen
Good Transport Links
In The Heart Of Mumbles

Additional details

Parking: On street
Garden: Back garden

Description

SUMMARY
A beautifully presented traditional three bedroom home with the added benefit of a loft room. Located in the heart of the popular seaside village of Mumbles, and within a short walking distance to the town where you can take advantage of all the local amenities, the seafront and pier and transport

DESCRIPTION
A beautifully presented traditional three bedroom home with the added benefit of a loft room. Located in the heart of the popular seaside village of Mumbles, and within a short walking distance to the town where you can take advantage of all the local amenities, the seafront, pier and transport links. The property briefly comprises; entrance hall, lounge, kitchen open to dining area, utility and downstairs bathroom. To the first floor you have the three bedrooms and a spiral staircase leading to the loft room. Externally to the front of the home there is resident permit parking there is a generous rear garden with a large outside shed. Viewing is highly recommended to appreciate the convenient location and home on offer.

Entrance Hall
Door to lounge

Lounge 13' 4" Into Bay max x 13' 5" Max ( 4.06m Into Bay max x 4.09m Max )
Bay window to front, carpeted, fireplace with a wood burner. Fitted shelving in alcove, radiator and door to;

Dining Room 11' 2" x 13' 5" Max Alcove ( 3.40m x 4.09m Max Alcove )
Fitted shelving in alcove, radiator, carpeted and stairs to the first floor. Leading on to an opening to the kitchen.

Kitchen 12' 2" Max x 12' 5" Max ( 3.71m Max x 3.78m Max )
Fitted with matching wall and base units, Induction hob, eye level electric oven. Stainless steel built under sink with stainless steel tap. Plumbing for washing machine. Skylight velux window. Patio door to rear garden and hallway leading to utility space and downstairs bathroom. Tiled flooring

Utilty Space
Tiled flooring, door to rear garden and bathroom.

Bathroom
Fitted with a three piece suite including a pedestal sink, Wc and paneled bath with shower over. Radiator, tiled flooring and windows to side and rear

Landing
Wooden floorboards, doors to bedrooms, spiral staircase to loft room

Bedroom One 11' 2" x 12' 3" ( 3.40m x 3.73m )
Wooden floorboards, window to front, traditional fire surround, radiator and fitted storage cupboards

Bedroom Two 11' 3" x 8' 3" Max alcove ( 3.43m x 2.51m Max alcove )
Carpet, window to rear and radiator

Bedroom Three 9' 2" x 7' 1" ( 2.79m x 2.16m )
Wall mounted boiler, carpeted. radiator and window to rear

Loft Room 9' 8" Max x 11' 6" Max ( 2.95m Max x 3.51m Max )
Windows to the front and rear, carpeted and radiator.

External
Lawned garden with a patio section. Large storage shed and rear access. The rear bedrooms and garden offer views of Oystermouth Castle.

Listed by

Swansea

Peter Alan - Connells

Reference: 76157186

EPC Rating & Upgrade Cost

Current rating: E

Potential rating: C

Inspection date: 11/10/2018

Current heating cost: £995/year

Potential heating cost: £724/year

EPC E or below may face future regulation risk. Upgrading to C could improve long-term ROI.

Recommendations

Flat roof or sloping ceiling insulation (1,500)
Room-in-roof insulation (2,700)
Cavity wall insulation (1,500)
50 mm internal or external wall insulation (14,000)
Low energy lighting for all fixed outlets (25)
Solar water heating (6,000)
Solar photovoltaic panels, 2.5 kWp (8,000)

View full EPC on gov.uk

Flood risk

Zone: 1

Risk: Low

Job (default Low)

Floorplans

Floorplan 1

EPC Graphs

EPC

FENSA Certificates

This property has 1 FENSA certificate(s) on record, indicating window/door installations by FENSA-approved installers.

FENSA Certificate #2874255

Property Details

Street: 15 Castle Street

Town: Mumbles

Postcode: SA3 4BH

Installation Details

Items: 2 windows

Certificate Issued: 18/07/2005

Work Completed: 20/06/2005

This certificate data was retrieved from FENSA's database

What is FENSA? FENSA (Fenestration Self-Assessment Scheme) is a government-authorised scheme that monitors building regulation compliance for replacement windows and doors. Certificates indicate that work was completed by FENSA-approved installers.

Price history

Event	Date	Price	% change
Sold	29/10/2019 (6 years ago)	£235,000	—

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
23 OAKLAND ROAD, MUMBLES, SWANSEA, SA3 4AQ	£456,500	18/03/2025	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
3 OAKLAND ROAD, MUMBLES, SWANSEA, SA3 4AQ	£396,000	06/10/2022	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
7 OAKLAND ROAD, MUMBLES, SWANSEA, SA3 4AQ	£447,756	16/08/2022	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
35 LANGLAND ROAD, MUMBLES, SWANSEA, SA3 4LX	£455,000	29/07/2022	Terraced

Street average: £328,375 (4 sales)

Area average: £340,888 (20 sales)

Capital growth trend

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

5y growth -16.6%

10y growth 52.4%

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	Oyster Gallery	0.0 miles
Shop	ROCO Mumbles	0.0 miles
Bus stop	Oystermouth Primary School	0.1 miles
Bus stop	Oystermouth RBL Club	0.1 miles
Hospital	Gower Physiotherapy Clinic	1.8 miles
University	Swansea University	4.0 miles
Train station	Swansea	4.4 miles
Train station	Gowerton	5.2 miles

Street-level crime

Category	Count
Violence and sexual offences	16
Shoplifting	8
Public order	4
Criminal damage and arson	3
Possession of weapons	3
Anti-social behaviour	2
Drugs	2
Vehicle crime	2
Burglary	1
Other theft	1
Total incidents	42

Within 1 mile during Mar 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)
Newton Primary School	Other	0.5 miles	— (No rating)
Grange Primary School	Other	0.5 miles	— (No rating)
St David's Catholic 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
3 Bed Semi-Detached House, Victoria Avenue, SA3	£2,500/mo	3	0.07 miles	OpenRent
3 Bed Detached House, Victoria Avenue, SA3	£2,800/mo	3	0.07 miles	OpenRent
3 Bed Flat, Mumbles, SA3	£1,300/mo	3	0.07 miles	OpenRent
3 Bed Semi-Detached House, Queens Rd, SA3	£2,850/mo	3	0.11 miles	OpenRent
3 Bed Terraced House, Gloucester Place, SA3	£1,250/mo	3	0.19 miles	OpenRent
3 Bed Terraced House, Oakland Road, SA3	£1,550/mo	3	0.22 miles	OpenRent
3 Bed Detached House, Beaufort Close, SA3	£1,850/mo	3	0.5 miles	OpenRent
3 Bed Bungalow, Highmead Avenue, SA3	£2,800/mo	3	0.62 miles	OpenRent

Average rent: £2,113/mo (8 listings)

Rent-driven metrics

Based on OpenRent comparables.

Rent ratio 0.87%

Max investor price (0.8%) £271,875

Target investor price (1%) £217,500

Gross yield 10.4%

Cost-to-rent ratio 9.6×

Monthly cashflow £948/mo 75% LTV, 3.95% APR (5yr fixed), 25yr term

Cash-on-cash ROI 15.7%

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).