What is the average house price in Gwynedd (LL51)?

Over the last 12 months the median house sale price in LL51 (Gwynedd) was £145k, with an average of £145k, from 3 recorded sales (HM Land Registry).

What is the price per square metre in LL51?

Typical sale prices per square metre in LL51 are £2,237 for houses and £0 for flats, where floor area is recorded on the energy certificate.

What EPC rating do homes in LL51 have?

Homes in LL51 most commonly hold EPC band E, with a median current energy-efficiency score of 46 (a potential of 80 after improvements).

How many properties sold in LL51 in the last year?

3 properties were sold in LL51 over the last 12 months, and 19 over the last three years (HM Land Registry Price Paid data).

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AREA REPORT · GWYNEDD LL51

LL51.

Gwynedd

LL51 is an outcode in Gwynedd, covering the neighbourhoods of Porthmadog, Pen-y-groes, Tal-y-sarn & Dyffryn Nantlle and Cricieth & Llanaelhaearn. Over the last 12 months 3 properties changed hands — a median of — for flats (£0/sqm) and £145k for houses (£2,237/sqm). Housing stock peaks at EPC band E.

Recorded dwellings

293

residential addresses we hold records for

Across

sectors — see breakdown below

Sales

12 month

3 year

Flats

Houses

Recorded transactions across the area.

Median sale price

12 month

3 year

Flats

—

n = 0

—

n = 0

Houses

£145k

n = 3

£209k

n = 19

Median sale price across the window.

Median £/sqm

12 month

3 year

Flats

—

n = 0

—

n = 0

Houses

£2,237

n = 3

£2,649

n = 17

Typical price per square metre, where floor area is available.

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PRICE MATRIX

Sales by window, type, and floor area.

Headline price

Mean

Houses

▼Correcting

−17.2% vs 12m

−42.6% vs 3y

Flats

·Limited data

— vs 12m

— vs 3y

Bar height = median sale price. Tick = mean. Trend word reads the joint state of the 6m-vs-12m and 6m-vs-3y tiers.

Size-normalised — £ per sqm

Mean

Houses

▼Correcting

−27.5% vs 12m

−38.8% vs 3y

Flats

·Limited data

— vs 12m

— vs 3y

From EPC-matched floor area. Hatched bars mark windows where fewer than 60% of sales matched a certificate.

›Show numbers

Segment

Avg £

Median £

Avg £/sqm

Median £/sqm

Houses · 6m

Avg £

£120k

n=1

Median £

£120k

n=1

Avg £/sqm

£1,622

n=1

Median £/sqm

£1,622

n=1

Houses · 12m

Avg £

£145k

n=3

Median £

£145k

n=3

Avg £/sqm

£2,216

n=3

Median £/sqm

£2,237

n=3

Houses · 3y

Avg £

£255k

n=19

Median £

£209k

n=19

Avg £/sqm

£2,773

n=17

Median £/sqm

£2,649

n=17

Flats · 6m

Avg £

—

n=0

Median £

—

n=0

Avg £/sqm

£0

n=0

Median £/sqm

£0

n=0

Flats · 12m

Avg £

—

n=0

Median £

—

n=0

Avg £/sqm

£0

n=0

Median £/sqm

£0

n=0

Flats · 3y

Avg £

—

n=0

Median £

—

n=0

Avg £/sqm

£0

n=0

Median £/sqm

£0

n=0

PRICE + VOLUME · 25Y

Medians and monthly sales, 2001–present.

EPC · 25Y

Certificates issued, by band.

Median EPC score

Median potential

COUNCIL TAX

Band distribution.

Column width shows the number of properties in each council tax band. Colour shows the composition within that band.

Flats/maisonettes

Terraced

Bungalows

Band A

Terraced

Semi-detached

Band B

220

Terraced

Semi-detached

Detached

Bungalows

Band C

139

Detached

Bungalows

Band D

299

Detached

Bungalows

Band E

207

Detached

Band F

Detached

Band G

Band H

Band I

Flats/maisonettes

Terraced houses

Semi-detached houses

Detached houses

Bungalows

Other/unknown

Property type totals

Flats/maisonettes

2.0%

Terraced houses

181

19%

Semi-detached houses

149

15%

Detached houses

406

42%

Bungalows

212

22%

Other/unknown

<1%

AMENITIES

Transport access and schools.

Counts of public transport stop points and schools inside the outcode (or within ~100m of the boundary). Drill into a sector for the full stop-by-stop list.

Rail stations

Metro & tram

Bus & coach

Bus stops

Schools

SECTORS

Drill down to sector.

Drill in

Open the full report for any LL51 sector.

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Sector

Sales (3y)

Median house

Median flat

COVERAGE

Neighbourhoods and wards.

Neighbourhoods (MSOA)

3 · click column to sort

Porthmadog

295

192

Pen-y-groes, Tal-y-sarn & Dyffryn Nantlle

Cricieth & Llanaelhaearn

Wards

4 · click column to sort

Dolbenmaen

288

185

Clynnog

Glaslyn

Llanystumdwy

NEARBY OUTCODES

Nearby outcodes.

FAQ

LL51 property data — common questions

What is the average house price in Gwynedd (LL51)?: Over the last 12 months the median house sale price in LL51 (Gwynedd) was £145k, with an average of £145k, from 3 recorded sales (HM Land Registry).
What is the price per square metre in LL51?: Typical sale prices per square metre in LL51 are £2,237 for houses and £0 for flats, where floor area is recorded on the energy certificate.
What EPC rating do homes in LL51 have?: Homes in LL51 most commonly hold EPC band E, with a median current energy-efficiency score of 46 (a potential of 80 after improvements).
How many properties sold in LL51 in the last year?: 3 properties were sold in LL51 over the last 12 months, and 19 over the last three years (HM Land Registry Price Paid data).

REFRESHED 13 JUN 2026 ·DATA & SOURCES