21 Carmarthen Avenue, Drayton, Portsmouth, PO6 2AG
About 21 Carmarthen Avenue
21 Carmarthen Avenue is a four-bedroom semi-detached house in Drayton, Portsmouth, Portsmouth (PO6 2AG). It has a recorded floor area of 147 m² (around 1582 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (May 2018) shows an E (score 42), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 78), a 2-band jump.
It lags the bulk of the postcode on energy efficiency (less efficient than 72% of similar EPCs). Today's modelled estimate of £585,000 is 19.4% above the 2018 sale price. On a £-per-square-foot basis, the last sale (£310/sq ft) was about 20.5% above the typical sold price in the postcode. Most recent transfer: August 2018 at £490,000. One historical planning record sits against the property in 2018.
Know exactly what you're buying at 21 Carmarthen Avenue
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
- Bathrooms1
- Dining roomYes
- EnsuiteYes
Outside
- Private gardenWest-facing
- GarageIntegral
Energy performance
21 Carmarthen Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Planning history
- Nov 2018ExtensionFullIn report
Extension: Single storey · Rear of property
Construction of single storey rear extension and raised decking area
- Agent
- FAO Mr Conner Mallen
- Documents
- 10 docs on file
- Reference
- 18/01495/HOU
We flagged 2 things worth checking at 21 Carmarthen Avenue
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.
- Signs of HMO activity in the area
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
£585,000
Modelled from EPC, postcode comparables.
£490,000
Recorded with HM Land Registry.
Sales timeline
15 August 2018Most recent
£490,000
Median price across the last 5 sales in PO6 2AG: £628,000 (2024–2019).
Nearby sales in PO6 2AG
59 Carmarthen Avenue, Drayton, Portsmouth, PO6 2AG
Sold Nov 2024
£660,00015 Carmarthen Avenue, Drayton, Portsmouth, PO6 2AG
Sold Dec 2022
£628,00023 Carmarthen Avenue, Drayton, Portsmouth, PO6 2AG
Sold Sept 2021
£563,00055 Carmarthen Avenue, Drayton, Portsmouth, PO6 2AG
Sold Jun 2019
£770,0001a, Carmarthen Avenue, Drayton, Portsmouth, PO6 2AG
Sold Nov 2018
£465,000
Everything we know about 21 Carmarthen Avenue, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Signs of HMO activity in the area
- Larger development activity nearby

Versus other Carmarthen Avenue homes
21 Carmarthen Avenue is notably below the street on epc rating.
Price per m²
£3,333
Street avg £3,256
Floor Area
147 m²
Street avg 177 m²
Habitable Rooms
7 rooms
Street avg 7 rooms
CO₂ Emissions
8.8 t/year
Street avg 7.4 t/year
Similar properties nearby
1 East Court, Cosham
PO6 2NX
1 Edison Spur, Drayton
PO6 2NW
1 Bernard Avenue, Drayton
PO6 2JP
1 Carshalton Avenue
PO6 2JT
1 Carmarthen Avenue, Drayton
PO6 2AG
1 Beaconsfield Avenue
PO6 2PS
1 Dovercourt Road
PO6 2RZ
1 Cranborne Road, Drayton
PO6 2BG
The neighbourhood at a glance
Crime
9/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
Court Lane — bus stop.
Closest school
0.6 km
Court Lane Infant Academy. 22 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
53.0dB

Night-time· 23:00 – 07:00
43.6dB