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Get started11 Llys Castell is a detached house in Margam, Port Talbot, Port Talbot (SA13 2UX). It has a recorded floor area of 164 m² (around 1765 sq ft), construction records dating it to 1991-1995 and council tax band F. The latest certificate (November 2022) shows an E (score 53), well below the UK norm with real room to improve. Earlier certificates rated it D (December 2013); the latest reading is one band lower. Between certificates, roof efficiency dropped from Good to Average and hot-water efficiency dropped from Good to Poor. The recommended improvements would lift it to C (score 79), a 2-band jump.
Sale prices here have outpaced England HPI: 3.9% per year against 0% for the wider region. Today's modelled estimate of £374,000 is 49.6% above the 2014 sale price. At 164 m² the property is well over the postcode median (119 m² across 20 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. On the market in July 2014 and unlisted since — roughly 12 years.
11 Llys Castell sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
11 Llys Castell has an approved single-storey extension on the planning record.
Increase in size of existing side garage and attaching it to main dwelling house
11 Llys Castell valuation sits well clear of the typical sold price in this postcode.
£374,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.9% per year over 13 years.
£249,995
Growth on file: 3.9% per year over 13 years.
EPC Rating for 11 Llys Castell lags the street by a wide margin.
Price per m²
£1,524
Street avg £1,964
Floor Area
164 m²
Street avg 118 m²
Habitable Rooms
8 rooms
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
Coed Hirwaun Primary School — bus stop.
Extension: Single storey
Single-storey extensions to the front and side of the existing garage - including replacement garage door to front elevation and insertion of door to rear elevation
18 July 2014Most recent
£249,995
2 September 2005
£249,995
+66.7%over 4 years18 January 2001
£149,995
Median price across the last 5 sales in SA13 2UX: £345,000 (2025–2022).
Street avg 6 rooms
CO₂ Emissions
8.7 t/year
Street avg 3.9 t/year
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