Flat, 17 St James Street, Monmouth, NP25 3DL
About Flat
Flat is a mid-terrace house in Monmouth (NP25 3DL). It has a recorded floor area of 81 m² (around 872 sq ft), construction records dating it to before 1900 and council tax band C. At 81 m² this is the 9th smallest of 22 units on EPC record in the building, where floor areas span 38–404 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (39 versus a best of 77). The latest certificate (February 2022) shows an E (score 39), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since March 2012. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Very Poor to Poor and main heating went from Very Poor to Average. The recommended improvements would push it to D (score 68). Main heating runs on electricity.
It lags the bulk of the postcode on energy efficiency (less efficient than 81% of similar EPCs).
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's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating system upgraded to a more efficient system
Hot water system upgraded
Window efficiency improved
Wall insulation improved
Planning history
Flat has no planning applications on record.
Notable planning nearby
2applications 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
Flat has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£188,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in NP25 3DL: £350,000 (2023–2019).
Nearby sales in NP25 3DL
20 St James Street, Monmouth, NP25 3DL
Sold Oct 2023
£795,00011 St James Street, Monmouth, NP25 3DL
Sold May 2023
£335,00016a, St James Street, Monmouth, NP25 3DL
Sold Jan 2022
£350,00015 St James Street, Monmouth, NP25 3DL
Sold May 2021
£585,000Flat 1, 5 St James Street, Monmouth, NP25 3DL
Sold Aug 2019
£265,000
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 James Street homes
On epc rating, Flat runs well behind the street norm.
EPC Rating
39 (E)
Street avg 70 (C)
Floor Area
81 m²
Street avg 66 m²
CO₂ Emissions
8.4 t/year
Street avg 2.6 t/year
Habitable Rooms
4 rooms
Street avg 3 rooms
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The neighbourhood at a glance
Crime
1/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Monmouth School — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.