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Ynysddu

Interactive map displaying Ynysddu

About

Ynysddu ward sits within the Caerphilly county borough, encompassing the village of Ynysddu itself along with the neighbouring settlement of Cwmfelinfach. The area is defined by its position in the western Sirhowy Valley, with steep, wooded hillsides characterising much of its topography. Historically, the local economy was centred on coal mining, with several former collieries located in the valley. The landscape still bears the marks of this industrial past, which shaped the development of its communities.

The ward is traversed by the Sirhowy River and the A4048 road, which follows the valley floor. A notable local feature is the Nine Mile Point colliery industrial railway, a relic of the mining era. Land use is primarily residential, with some areas of open countryside and forestry on the valley slopes. The community is served by local amenities including primary schools and recreational grounds, maintaining its own distinct identity within the wider valley network.

Area overview

On average Ynysddu has moderate deprivation and moderate crime levels, with around 54 crimes per 1,000 residents per year. Approximately 12.6% of homes in this area are social housing provided by a local council or housing association. The average income per household in Ynysddu is £41,516 per year. Ynysddu is home to around 3,966 people, with a population density of about 280.4 per km2.

Crime rate
3/10
Crimes per 1k residents
54
Deprivation level
6/10
Income level
4/10
Social housing
12.6%
Connectivity
N/A

Area Profile

Ynysddu Population
3,966
Population density
280.4 per km²

Crime

Crime per 1,000 population

Anti-social behaviour
30.51(+110%)
Violence and sexual offences
24.71(-33%)
Criminal damage and arson
11.35(+40%)
Public order
9.08(+2%)
Burglary
3.28(+22%)
Wales average

Demographics

Ethnic groups

British
3,818
96.2%
Other White
58
1.46%
Irish
13
0.33%
White and Asian (mixed)
12
0.3%
White and Black Caribbean (mixed)
12
0.3%
Total population: 3,969

Economics

Education (age 16+)

Level 4 qualifications or above
795
24.57%
No qualifications
730
22.56%
Level 3 (A level)
608
18.79%
Level 2 (GCSEs 9-4)
524
16.19%
Level 1 (GCSEs 3-1)
342
10.57%
Total 16+ residents: 3,236

Housing

Housing tenure

Owns outright
590
35.39%
Owns with a mortgage
575
34.49%
Private landlord or letting agency
241
14.46%
Other social rented
107
6.42%
Social rents from council
96
5.76%
Total households: 1,667

Property prices in Ynysddu

Based on 37 recent sales, the median property price is £160,000 in Ynysddu area, with individual transactions ranging from £92,518 up to £525,000.

Price distribution per property type (last year)

Price distribution by property type for Ynysddu in the last year.

Median sale price and percentiles per property type (last year)

Median sale price, sales count, and percentile information for each property type in Ynysddu over the last year.
TypeSalesMedian
Detached7£410,000
Semi-Detached2£199,000
Terraced28£154,500

10 years median price trend in Ynysddu

Ten year median sale price trend for each property type in Ynysddu.

All postcodes in Ynysddu

NP117JR

Mount Pleasant

NP117PU

Railway Cottages

NP117BA

Twyn Gwyn Farm Lane

NP117BJ

Maindee Road

NP117NY

Ynys Hywel Lane

NP122HN

Glanhowy Road

NP117GZ

Melin Street

NP117HJ

Western Terrace

NP117QR

Prince Street

NP117RE

South Blackvein Industrial Estate

NP122HU

Pen Y Cwarel Road

NP117JA

Llys Deri

NP117GY

William Street

NP117JN

Commercial Street

NP117AX

Twyngwyn Road

NP117LF

Ynysddu

NP117HT

Commercial Buildings

NP117QZ

Morrisville

NP117HR

Maindee Road

NP117JP

Brynderwen

NP117QJ

Islwyn Road

NP117HB

Glannant Street

NP117HW

Commercial Road

NP117LG

Glenview Terrace

NP117GX

Arthur Street

NP117LL

Islwyn Close

NP117JD

Ynysddu

NP122HB

The Glade

NP117QQ

Hafod Tudor Terrace

NP117QW

Llanarth Street

NP117JE

Ynysddu Hotel Approach

NP122BQ

Ynysddu

NP117GT

Chapel View

NP117LA

Alexandra Road

NP117QY

Falcon Terrace

NP122HL

Tirbach Road

NP117AY

Twyn Gwyn Road

NP117JW

Ynysddu Hotel Approach

NP117HD

Syndicate Terrace

NP117LJ

Princes Court

NP122HJ

The Avenue

NP122HW

Glanhowy Road

NP117HY

Islwyn Street

NP117JL

Glyn Terrace

NP117JU

Bridge Street

NP117LN

The Gardens

NP117QN

Duffryn Terrace

NP117QX

Llanarth Villas

NP117PT

Blackvein Road

NP117QU

Duffryn Road

NP122JB

Newport Road

NP117HX

Ynysddu

NP117GU

New Road

NP117HF

Stanley Street

NP117HH

Mill Street

NP117HE

Penllwyn Street

NP117JG

Graig View

NP117JJ

High Street

NP122NH

Heol Y Coed

NP122HH

Greenhalgh Crescent

NP117HQ

Maindee Road

NP117BD

Ynysddu

NP117GW

Hillview

NP117LE

Caerllwyn Terrace

NP117RB

Ynysddu

NP117HP

Coronation Buildings

NP117JQ

Mount Pleasant

NP117JT

John Street

NP117QD

Islwyn Road

NP117QL

Islwyn Road

NP117BB

Troed-Y-Rhiw Road

NP117DP

Ynysddu

NP117QT

Nine Mile Point Road

NP117QS

Troed Y Rhiw Road

NP117LB

Myrtle Cottages

NP117HZ

Nine Mile Point Industrial Estate

NP117PX

North Blackvein Industrial Estate

NP117LD

Pontgam Terrace

NP117QF

Beechwood Avenue

NP117HA

Islwyn Street

NP117QE

Ynysddu

NP117QG

George Street

NP117BN

Llwyn Derwen

NP117GN

Ynysddu

NP117JZ

Alexandra Road

NP117HU

Firbank Terrace

NP117JY

Alexandra Road

NP117HL

King Street

NP117JH

High Street

NP117BP

Ynysddu

NP117JF

Alexandra Road

NP117NR

Cwrt Y Babell

NP117QH

Islwyn Road

NP122HP

Pen Y Cwarel Road

NP117RF

Duffryn Terrace

NP117JX

Station Avenue

NP117JS

Station Avenue

NP117HS

Pioneer Terrace

NP117HG

Bridge View

NP122HQ

Heol Y Coed

Data Sources

All data is sourced from official UK government agencies and public datasets. Last updated: 16/01/2026.