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Get started21 Castle Street is a mid-terrace house in Newport (NP20 2DF). It has a recorded floor area of 116 m² (around 1249 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (December 2014) shows an E (score 53), well below the UK norm with real room to improve. The rating has held steady at E across 3 certificates since October 2013. Between certificates, hot-water efficiency went from Average to Good. The recommended improvements would lift it to C (score 75), a 2-band jump. The latest certificate is from December 2014, so improvements made since then won't be reflected.
It lags the bulk of the postcode on energy efficiency (less efficient than 79% of similar EPCs). Across 2006–2024, sale prices here grew -0.1% per year, broadly in step with Newport's 0% HPI growth. Today's modelled estimate of £149,000 is 24.2% above the 2024 sale price. On a £-per-square-foot basis, the last sale (£96/sq ft) was about 20.9% above the typical sold price in the postcode. Most recent transfer: May 2024 at £120,000.
21 Castle Street's carbon output runs well above what efficient homes in the postcode produce.
This certificate is over 10 years old and is no longer valid.Expired 02 Dec 2024
21 Castle Street's sale-price growth has lagged the wider UK trajectory across its history on file.
£149,000
Modelled from EPC, postcode comparables and a sale-price growth of -0.1% per year over 17 years.
£120,000
Growth on file: -0.1% per year over 17 years.
21 Castle Street is notably below the street on co₂ emissions.
Price per m²
£1,034
Street avg £885
Floor Area
116 m²
Street avg 101 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Library — bus stop.
Changes detected from historical EPC data
Heating controls changed
Hot water system upgraded
Heating controls upgraded for better temperature management
Hot water efficiency improved
Are we missing something? Tell us about home improvements to help adjust your valuation.
3 May 2024Most recent
£120,000
-1.6%over 17 years24 November 2006
£122,000
Median price across the last 5 sales in NP20 2DF: £135,000 (2025–2018).
CO₂ Emissions
6.1 t/year
Street avg 4.9 t/year
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