21 Church Street is a five-bedroom detached house in Thriplow, Royston, Royston (SG8 7RE). It has a recorded floor area of 289 m² (around 3111 sq ft), construction records dating it to 2007 onwards and council tax band G. The latest certificate (March 2019) shows a C (score 74). The rating has held steady at C across 3 certificates since October 2008. The recommended improvements would push it to B (score 87). Main heating runs on oil.
Sale prices here have outpaced England HPI: 5.2% per year against 0% for the wider region. Today's modelled estimate of £1,274,000 is 15.8% above the 2020 sale price. At 289 m² the property is well over the postcode median (162 m² across 24 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 88% of similar EPCs). 5 bedrooms is on the larger side for this postcode, where 3 is the typical count. 7 planning records sit against the property, 4 approved, 0 refused. Past consents include an extension and an annexe, meaningful when judging how the property has evolved. The record references listed-building consent, which constrain future alterations. Most recent transfer: November 2020 at £1,100,000.
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
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21 Church Street's carbon output runs well above what efficient homes in the postcode produce.
21 Church Street has a listed-building consent on record — alterations to a listed property are tightly controlled.
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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21 Church Street has more than doubled in price since the earliest registered sale in 2007.
£1,274,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.2% per year over 14 years.
£1,100,000
Growth on file: 5.2% per year over 14 years.
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
EPC Rating for 21 Church Street runs comfortably ahead of the street norm.
Price per m²
£3,806
Street avg £4,408
Floor Area
289 m²
Street avg 186 m²
Habitable Rooms
10 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
0.3 km

Daytime· 07:00 – 23:00
42.8dB

Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Changes detected from historical EPC data
Switched from oil to mains gas, reducing emissions and costs
Heating controls changed
Hot water efficiency improved
Low energy lighting percentage decreased
Fuel source changed
Hot water efficiency decreased
Wall insulation upgraded
Roof insulation improved
More low energy lighting installed
Submission of details required by conditions 3 (External Materials), 4 (Methodology for protection of the listed buildings), 5 (Arboricultural Method Statement and Tree Protection Strategy), 6 (Surface water and foul water), 7 (Construction Ecological Management Plan (CEcMP)) and 9 (Scheme of biodiversity enhancement) of planning permission 20/01678/FUL
Submission of details required by condition 12 (Carbon Emissions) of planning permission 20/01678/FUL
5 November 2020Most recent
£1,100,000
+29.4%over 9 years11 September 2011
£850,000
+54.5%over 4 years16 March 2007
£550,000
Median price across the last 5 sales in SG8 7RE: £865,000 (2024–2019).

Street avg 7 rooms
CO₂ Emissions
6.2 t/year
Street avg 9.5 t/year
SG8 7XP
Thriplow CofE Primary School. 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
35.9dB