25a, Monnow Street, Monmouth, NP25 3EF
About 25a
25a is a two-bedroom end-of-terrace house in Monmouth (NP25 3EF). It has a recorded floor area of 107 m² (around 1152 sq ft), construction records dating it to before 1900 and council tax band D. It is a listed building, which means external alterations are tightly controlled but it may qualify for heritage tax reliefs. At 107 m² this is the largest unit on EPC record across the building (48–107 m²). The building's EPC ratings span E to D, with this unit at the top. The latest certificate (February 2025) shows a D (score 57), a step below the typical UK home. The rating has held steady at D across 2 certificates since March 2023. Between certificates, window efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to B (score 81), a 2-band jump.
At 107 m² the property is well over the postcode median (55 m² across 5 EPCs), placing it in the larger end of the local stock. Across 2017–2024, sale prices on this property compounded at 10% per year. Last sale on file: £285,000 in January 2024.
Know exactly what you're buying at 25a
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
What this property has
Inside
- Bedrooms2
- Bathrooms1
- Dining roomYes
Outside
- ParkingAllocated
Building
- Listed buildingYes
- RefurbishedYes
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Planning history
25a has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 25a
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
£271,000
Modelled from EPC, postcode comparables and a sale-price growth of 10.0% per year over 6 years.
£285,000
Growth on file: 10.0% per year over 6 years.
Sales timeline
31 January 2024Most recent
£285,000
+83.9%over 6 years13 September 2017
£155,000
Everything we know about 25a, 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 Monnow Street homes
On floor area, 25a stands well clear of the street.
EPC Rating
57 (D)
Street avg 59 (D)
Floor Area
107 m²
Street avg 63 m²
CO₂ Emissions
5.9 t/year
Street avg 3.6 t/year
Habitable Rooms
4 rooms
Street avg 2 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
Agincourt Square — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.