15 St James Street, Monmouth, NP25 3DL
About 15 St James Street
15 St James Street is a four-bedroom mid-terrace house in Monmouth (NP25 3DL). It has a recorded floor area of 231 m² (around 2486 sq ft), construction records dating it to before 1900 and council tax band F. The latest certificate (November 2024) shows an E (score 52), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since June 2012. Between certificates, window efficiency went from Very Poor to Poor, hot-water efficiency went from Poor to Good and lighting went from Good to Very Good. The recommended improvements would lift it to C (score 77), a 2-band jump. Other recorded features include a basement. Period features are noted in the property record.
At 231 m² the property is well over the postcode median (83 m² across 21 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 81% of similar EPCs). 5 planning records sit against the property, 4 approved, 0 refused. Past consents include an extension and partial demolition, meaningful when judging how the property has evolved. The record references listed-building consent, which constrain future alterations. Across 2013–2021, sale prices on this property compounded at 11.6% per year. Today's modelled estimate of £650,000 is 11.1% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£235/sq ft) was about 28.7% above the typical sold price in the postcode. Last sale on file: £585,000 in May 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 15 St James Street
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
- Bedrooms4
- Bathrooms2
- Open-plan layoutYes
- BasementYes
Building
- Period featuresYes
Energy performance
15 St James Street's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water system upgraded
Window efficiency improved
More low energy lighting installed
Planning history
Planning history includes recorded demolition works, indicating a major rebuild phase at this address.
- Feb 2022ConditionsIn report
Discharge of condition 4 (Level 1 Building Record) for planning decision DM/2021/01565.
- Documents
- 5 docs on file
- Reference
- DM/2022/00127
- Dec 2021RenovationHeritageIn report
The installation of a modern waterproof tanking system to an existing basement space to create a family room and study. The waterproofing system will be an egg crate system to BS8102. Works include repairs to existing historic finishes and restoration of lath and plaster ceiling. Upgraded lighting and movement of existing services and plumbing.
Listed- Documents
- 15 docs on file
- Reference
- DM/2021/01565
We flagged 1 thing worth checking at 15 St James Street
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
Sale price has at least doubled since 2013.
£650,000
Modelled from EPC, postcode comparables and a sale-price growth of 11.6% per year over 8 years.
£585,000
Growth on file: 11.6% per year over 8 years.
Sales timeline
25 May 2021Most recent
£585,000
+134.0%over 7 years15 August 2013
£250,000
Median price across the last 5 sales in NP25 3DL: £335,000 (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
£350,000Flat 1, 5 St James Street, Monmouth, NP25 3DL
Sold Aug 2019
£265,0004 St James Street, Monmouth, NP25 3DL
Sold Mar 2019
£290,000
Everything we know about 15 St James Street, 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
CO₂ Emissions for 15 St James Street lags the street by a wide margin.
Price per m²
£2,532
Street avg £2,306
Floor Area
231 m²
Street avg 204 m²
Habitable Rooms
10 rooms
Street avg 8 rooms
CO₂ Emissions
12.0 t/year
Street avg 9.5 t/year
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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.