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Deiniolen

Interactive map displaying Deiniolen

About

Deiniolen ward lies within the historic slate quarrying region of Dyffryn Nantlle, north of Llanberis. The area is defined by its industrial heritage, with the remnants of the Dorothea Quarry and its flooded pits forming a significant part of the local landscape. The community is centred around the village of the same name, with residential streets set against a backdrop of former quarry workings and upland terrain.

The physical environment is a mix of built settlement and post-industrial land, with Mynydd Mawr rising to the west. Local life focuses on the primary school, community centres, and chapels. The ward's history is visibly embedded in the terrain, where water-filled quarries and slate tips are common features across the open, rugged ground.

Area overview

On average Deiniolen has high deprivation and very low crime levels, with around 51 crimes per 1,000 residents per year. Approximately 17.3% of homes in this area are social housing provided by a local council or housing association. The average income per household in Deiniolen is £49,454 per year. Deiniolen is home to around 1,896 people, with a population density of about 108.3 per km2.

Crime rate
2/10
Crimes per 1k residents
51
Deprivation level
7/10
Income level
9/10
Social housing
17.3%
Connectivity
N/A

Area Profile

Deiniolen Population
1,896
Population density
108.3 per km²

Crime

Crime per 1,000 population

Violence and sexual offences
31.65(-14%)
Anti-social behaviour
11.6(-20%)
Criminal damage and arson
4.75(-41%)
Public order
4.75(-47%)
Other crime
4.22(+79%)
Wales average

Demographics

Ethnic groups

British
1,826
96.41%
Other White
30
1.58%
White and Black Caribbean (mixed)
8
0.42%
Other Mixed or Multiple ethnic groups
8
0.42%
Irish
6
0.32%
Total population: 1,894

Economics

Education (age 16+)

Level 4 qualifications or above
548
35.98%
Level 2 (GCSEs 9-4)
249
16.35%
Level 3 (A level)
234
15.36%
No qualifications
228
14.97%
Level 1 (GCSEs 3-1)
136
8.93%
Total 16+ residents: 1,523

Housing

Housing tenure

Owns outright
316
39.3%
Owns with a mortgage
213
26.49%
Social rents from council
88
10.95%
Other social rented
80
9.95%
Private landlord or letting agency
69
8.58%
Total households: 804

Property prices in Deiniolen

Based on 20 recent sales, the median property price is £158,000 in Deiniolen area, with individual transactions ranging from £92,000 up to £372,000.

Price distribution per property type (last year)

Price distribution by property type for Deiniolen 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 Deiniolen over the last year.
TypeSalesMedian
Detached6£292,500
Semi-Detached5£115,000
Terraced9£130,500

10 years median price trend in Deiniolen

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

All postcodes in Deiniolen

LL553EQ

Deiniolen

LL553ER

Deiniolen

LL553HG

Deiniolen

LL553EA

Deiniolen

LL553EL

Bro Elidir

LL553DT

Brynteg

LL553HT

Marian Terrace

LL553EZ

Deiniolen

LL553LH

New Street

LL553DY

Gwyrfai Terrace

LL553HH

High Street

LL553HX

Deiniolen

LL553NG

Minffordd

LL553NB

Deiniolen

LL553HR

High Street

LL553DR

Glynafon Terrace

LL553HL

Rhydfadog Estate

LL553DS

Penyrolchfa

LL553ED

Deiniolen

LL553NA

Lon Garret

LL553HS

Caradog Place

LL553HU

High Street

LL553LL

Deiniol Road

LL553LS

Pentre Helen

LL553LA

Gwel Y Bigil

LL553EW

Deiniolen

LL553HD

Follet Close

LL553LJ

Bro Gwenlyn

LL553EE

Lon Tai Castell

LL553LE

Green Terrace

LL553LD

Glyn Terrace

LL553LG

Cynfi Terrace

LL553ND

Deiniolen

LL553LP

Hafodoleu

LL553ES

Minffordd

LL553HY

North Road

LL553DG

Lon Haern

LL553ET

Dinorwic Cottages

LL553HW

Vaynol Terrace

LL553EB

Maes Gwylfa

LL553EY

Deiniolen

LL553LN

Pentre Helen

LL553DL

Deiniolen

LL553DU

California Terrace

LL553NF

Hafod Oleu

LL553PA

Deiniolen

LL553LR

Hafod Oleu

LL553EP

Lon Garret

LL553DP

Glandwr Terrace

LL553LB

View Terrace

LL553LU

Deiniolen

LL553DH

Arfon Cottages

LL553EN

Lon Garret

LL553HN

High Street

LL553DE

Deiniolen

LL553EF

Lon Tai Castell

LL553HP

High Street

LL554TY

Lon Garret

LL553AJ

Gwel Y Bigil

LL553EG

Deiniolen

LL553NE

Deiniolen

LL553LW

Pentre Helen

LL553DN

Dinorwic Terrace

LL553DW

Deiniolen

LL553LY

Deiniolen

LL553EH

Deiniolen

LL553LT

Victoria Terrace

LL553UA

Tai Gerddi

LL553EU

Dinorwic Houses

LL553HB

Deiniolen

LL553EJ

Stad Macpela

LL553HA

Deiniolen

LL553LF

Tabernacl Street

LL553DF

Stad Hafod

Data Sources

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