What kind of home is 21 Alder Avenue, SA9 1AQ?

21 Alder Avenue, SA9 1AQ is a 3-bedroom semi-detached house.

What did 21 Alder Avenue, SA9 1AQ sell for?

21 Alder Avenue, SA9 1AQ last sold for £278,000 in February 2025, around 1 years ago. Before that, it sold for £57,500 in September 1995, so prices have been rising over 29 years on record. Source: HM Land Registry.

Has 21 Alder Avenue, SA9 1AQ appreciated in value?

Across 2 sales between September 1995 and February 2025, 21 Alder Avenue, SA9 1AQ rose from £57,500 to £278,000, a change of £220,500. That works out to roughly +5.5% per year compounded over 29 years. Source: HM Land Registry.

What is the EPC rating for 21 Alder Avenue, SA9 1AQ?

The current EPC rating for 21 Alder Avenue, SA9 1AQ is D with a score of 57 out of 100, lodged in October 2024. The assessor estimates the property could reach a C. Source: EPC Register.

How big is 21 Alder Avenue, SA9 1AQ?

21 Alder Avenue, SA9 1AQ has a recorded floor area of 109 m² (1,173 sq ft), around 36 m² per bedroom. That makes it about 10% larger than the median EPC-recorded property in SA9 1AQ. Source: EPC Register.

What heating system does 21 Alder Avenue, SA9 1AQ use?

The latest EPC at 21 Alder Avenue, SA9 1AQ records mains gas as the main heating fuel. Source: EPC Register.

What is the council tax band for 21 Alder Avenue, SA9 1AQ?

21 Alder Avenue, SA9 1AQ is in council tax band D.

Which area is 21 Alder Avenue, SA9 1AQ in?

21 Alder Avenue, SA9 1AQ sits in Ystradgynlais, Swansea, Swansea. It falls within the SA9 postcode district.

Is 21 Alder Avenue, SA9 1AQ in a safe area?

Police records around 21 Alder Avenue, SA9 1AQ show an average of 6 reported crimes per month over the last 9 months. Violent crime makes up roughly 72% of reports, the most common category. The overall trend is broadly stable. Source: Police UK.

How well connected is 21 Alder Avenue, SA9 1AQ?

The closest bus stop to 21 Alder Avenue, SA9 1AQ is Post Office, 205m away. In total there are 30 bus stops within the surrounding area.

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21 Alder Avenue, Ystradgynlais, Swansea, SA9 1AQ

Property type

Semi-detached

Bedrooms

Bathroom

Floor area

109 m²

1173 sq ft

Energy rating

Score 57

Council tax

Band D

Tenure

Owner Occupied

Overview

About 21 Alder Avenue

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

21 Alder Avenue is a three-bedroom semi-detached house in Ystradgynlais, Swansea, Swansea (SA9 1AQ). It has a recorded floor area of 109 m² (around 1173 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (October 2024) shows a D (score 57), a step below the typical UK home. The recommended improvements would push it to C (score 77).

It changed hands recently, sold February 2025 for £278,000. Across 1995–2025, sale prices on this property compounded at 5.5% per year. On a £-per-square-foot basis, the last sale (£237/sq ft) was about 56.3% above the typical sold price in the postcode.

Before you offer

Know exactly what you're buying at 21 Alder Avenue

Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.

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Valuation

against the asking price

Risks

planning & flood

Sold prices

similar homes nearby

Trends

the local market

Specifications

What this property has

Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.

Inside

Bedrooms3
Bathrooms1

Outside

Private gardenrear
GarageYes

Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

21 Alder Avenue's carbon output runs well above what efficient homes in the postcode produce.

EPC Rating

D57

Main Heating

Gas

Main Fuel

Gas

Hot Water

Good

Windows

Average

CO2 Emissions

6.1 t/year

Occupancy

Owner Occupied

Planning

Planning history

Applications and permits filed against 21 Alder Avenue, Ystradgynlais, Swansea, SA9 1AQ, sourced from the PlanIt planning register.

21 Alder Avenue has no planning applications on record.

Notable planning nearby

2applications of note in the surrounding area

Before you offer

We flagged 1 thing worth checking at 21 Alder Avenue

Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.

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Price

Sales history & valuation

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

Latest sale on 21 Alder Avenue was the highest on Land Registry record across the postcode.

Current estimate

£299,000

Modelled from EPC, postcode comparables and a sale-price growth of 5.5% per year over 29 years.

See how we calculated this

Last sold (2025)

£278,000

Growth on file: 5.5% per year over 29 years.

Sales timeline

26 February 2025Most recent
£278,000
+383.5%over 29 years
28 September 1995
£57,500

Median price across the last 5 sales in SA9 1AQ: £230,000 (2025–2021).

Nearby sales in SA9 1AQ

Before you offerLaunch offer · save £5

Everything we know about 21 Alder Avenue, in one report

What it's really worth, what could be wrong, and the planning, sales and area data in full.

What we flagged

Larger development activity nearby

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On the street

Versus other Alder Avenue homes

Four headline reads against 14 similar houses on this street, drawn from the latest EPC and Land Registry data.

Years Held for 21 Alder Avenue lags the street by a wide margin.

Price per m²

£2,550

Street avg £1,874

Strongly above

Floor Area

109 m²

Street avg 101 m²

Above

Habitable Rooms

5 rooms

Street avg 5 rooms

Below

CO₂ Emissions

6.1 t/year

Street avg 5.2 t/year

Below

Comparables

Similar properties nearby

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

£272k

1 Brynawel Villas, Brecon Road, Ystradgynlais

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£256k

1 Brynygroes Cottages, Ystradgynlais

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£248k

1 Abercrave Villas, Heol Tawe, Abercrave

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3 bed

£240k

1 2 Metz Cottages, Ystradgynlais

SA9 1SB

3 bed1 bath

£188k

1 Caehopkin Cottage, Caehopkin Road, Abercrave

SA9 1TX

3 bed1 bath

£201k

1 Caemaen, Brecon Road, Penycae

SA9 1YN

2 bed

£194k

1 Coedlan, Lower Cwmtwrch

SA9 1ED

4 bed

£164k

1 Brooklands Terrace, Abercrave

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2 bed

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

6/mo

Steady year-on-year across the wider district.

Nearest stop

0.2 km

Post Office — bus stop.

Go deeper on the local area

The full report breaks down crime, transport links, schools and air quality in depth.

Map

Everything within walking distance

Schools, transport stops and scenic spots near this property — 30 points of interest in total.

FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 21 Alder Avenue, Ystradgynlais, Swansea, SA9 1AQ. Each answer is also embedded as structured data for search engines.