25 High Street is a five-bedroom detached house in Guilden Morden, Royston, Royston (SG8 0JP). It has a recorded floor area of 208 m² (around 2239 sq ft), construction records dating it to 1983-1990 and council tax band G. The latest certificate (February 2026) shows an E (score 48), well below the UK norm with real room to improve. Earlier certificates rated it D (March 2014); the latest reading is one band lower. Between certificates, roof efficiency went from Poor to Average and lighting went from Very Poor to Good; while hot-water efficiency dropped from Poor to Very Poor and main heating dropped from Average to Poor. The recommended improvements would lift it to C (score 72), a 2-band jump. Main heating runs on oil. This certificate was lodged in the last six months, so the rating reflects current condition. Other recorded features include attached land beyond the plot.
Today's modelled estimate of £758,000 is 12.3% above the 2021 sale price. Last sale on file: £675,000 in October 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
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25 High Street's carbon output runs well above what efficient homes in the postcode produce.
25 High Street has no planning applications on record.
Notable planning nearby
1applications of note in the surrounding area
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.
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The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£758,000
Modelled from EPC, postcode comparables.
£675,000
Recorded with HM Land Registry.
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
Years Held for 25 High Street lags the street by a wide margin.
Price per m²
£3,245
Street avg £3,010
Floor Area
208 m²
Street avg 228 m²
Habitable Rooms
7 rooms
Street avg 8 rooms
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Closest school
0.4 km

Daytime· 07:00 – 23:00
43.0dB

Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water efficiency decreased
Roof insulation improved
More low energy lighting installed
19 October 2021Most recent
£675,000
Median price across the last 5 sales in SG8 0JP: £580,000 (2018–2014).

CO₂ Emissions
10.0 t/year
Street avg 10.8 t/year
SG8 0PT
Guilden Morden CofE Primary Academy. 2 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Night-time· 23:00 – 07:00
35.8dB