7 Plas Mair, William Street, Aberystwyth, SY23 1EB
About 7 Plas Mair
7 Plas Mair is a two-bedroom semi-detached house in Aberystwyth (SY23 1EB). It has a recorded floor area of 61 m² (around 657 sq ft), construction records dating it to 1983-1990 and council tax band D. Tenure is freehold. At 61 m² this is the 6th smallest of 9 units on EPC record in the building, where floor areas span 55–88 m². The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (67 versus a best of 81). The latest certificate (January 2016) shows a D (score 67), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 75). Main heating runs on electricity. The latest certificate is from January 2016, so improvements made since then won't be reflected.
Untraded for 26 years, with the last transfer in September 2000. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 1995–2000, sale prices on this property compounded at 2.6% per year. Today's modelled estimate of £156,000 sits 160% above the 2000 sale of £60,000. On a £-per-square-foot basis, the last sale (£91/sq ft) was about 17.7% below the postcode norm.
Know exactly what you're buying at 7 Plas Mair
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms2
- Bathrooms1
Outside
- ParkingYes
Building
- TenureFreehold
Energy performance
7 Plas Mair sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 22 Jan 2026
EPC Rating
Planning history
7 Plas Mair has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
Sales history & valuation
7 Plas Mair valuation sits well clear of the typical sold price in this postcode.
£156,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.6% per year over 5 years.
£60,000
Growth on file: 2.6% per year over 5 years.
Sales timeline
14 September 2000Most recent
£60,000
+13.2%over 4 years8 December 1995
£53,000
Median price across the last 5 sales in SY23 1EB: £140,000 (2022–2009).
Nearby sales in SY23 1EB
3 Plas Mair, William Street, Aberystwyth, SY23 1EB
Sold Feb 2022
£142,0008 Plas Mair, William Street, Aberystwyth, SY23 1EB
Sold Sept 2021
£120,0002 Plas Mair, William Street, Aberystwyth, SY23 1EB
Sold Sept 2013
£177,5001 Plas Mair, William Street, Aberystwyth, SY23 1EB
Sold Sept 2002
£119,9506 Plas Mair, William Street, Aberystwyth, SY23 1EB
Sold Feb 2001
£58,500
Everything we know about 7 Plas Mair, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?

Versus other William Street homes
On epc rating, 7 Plas Mair runs well behind the street norm.
Price per m²
£984
Street avg £1,639
Floor Area
61 m²
Street avg 58 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
4.2 t/year
Street avg 2.9 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Mill Street — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.