Flat, 23 St Thomas Square, Monmouth, NP25 5ES
About Flat
Flat is a mid-terrace house in Monmouth (NP25 5ES). It has a recorded floor area of 75 m² (around 803 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (March 2009) shows an F (score 29), near the bottom of the EPC scale. The recommended improvements would push it to E (score 41). Main heating runs on electricity. The latest certificate is from March 2009, so improvements made since then won't be reflected.
At 75 m² the property is well over the postcode median (47 m² across 12 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. Across 1995–2022, sale prices on this property compounded at 2.5% per year. Today's modelled estimate of £192,000 is 42.2% above the 2022 sale price. Last sale on file: £135,000 in October 2022. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at Flat
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
Flat 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This certificate is over 10 years old and is no longer valid.Expired 16 Mar 2019
EPC Rating
Planning history
Flat has no planning applications on record.
Notable planning nearby
1applications of note in the surrounding area
We flagged 1 thing worth checking at Flat
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£192,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.5% per year over 27 years.
£135,000
Growth on file: 2.5% per year over 27 years.
Sales timeline
6 October 2022Most recent
£135,000
+9.8%over 5 years16 December 2016
£123,000
+78.3%over 21 years23 April 1995
£69,000
Median price across the last 5 sales in NP25 5ES: £253,000 (2025–2013).
Nearby sales in NP25 5ES
Flat 1, 9 St Thomas Square, Monmouth, NP25 5ES
Sold Jul 2025
£253,00025 St Thomas Square, Monmouth, NP25 5ES
Sold Jan 2018
£152,00014 St Thomas Square, Monmouth, NP25 5ES
Sold Feb 2017
£332,50012 St Thomas Square, Monmouth, NP25 5ES
Sold Oct 2014
£400,00027 St Thomas Square, Monmouth, NP25 5ES
Sold Jan 2013
£124,000
Everything we know about Flat, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby
Versus other St Thomas Square homes
On price per m², Flat runs well behind the street norm.
Price per m²
£1,811
Street avg £2,441
Floor Area
75 m²
Street avg 162 m²
Habitable Rooms
4 rooms
Street avg 8 rooms
CO₂ Emissions
7.8 t/year
Street avg 5.9 t/year
Similar properties nearby
Abbeyfield House, Flat 10, Goldwire Lane
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1 3, Flat 2, Monnow Bridge
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1 3, Flat 1, Monnow Bridge
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13a, Flat 2, St Thomas Square
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Crompton Court, Flat 13, Drybridge Street
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13a, Flat 1, St Thomas Square
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Crompton Court, Flat 11, Drybridge Street
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1 3, Flat 3, Monnow Bridge
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The neighbourhood at a glance
Crime
1/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Cinderhill — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.