Old Mill House, Kiln Green, Diggle, Oldham, OL3 5JY
About Old Mill House
Old Mill House is a detached house in Diggle, Oldham, Oldham (OL3 5JY). It has a recorded floor area of 238 m² (around 2562 sq ft), construction records dating it to before 1900 and council tax band G. The latest certificate (September 2023) shows an E (score 44), well below the UK norm with real room to improve. Earlier certificates rated it D (September 2012); the latest reading is one band lower. Between certificates, lighting went from Good to Very Good; while wall efficiency dropped from Good to Very Poor and window efficiency dropped from Good to Average. The recommended improvements would lift it to C (score 77), a 2-band jump.
It hasn't traded since August 1999, a hold of 27 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 238 m² the property is well over the postcode median (97 m² across 12 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs). Today's modelled estimate of £720,000 sits 206.4% above the 1999 sale of £235,000. On a £-per-square-foot basis, the last sale (£92/sq ft) was about 61% below the postcode norm. 9 planning records sit against the property, 5 approved, 2 refused. Past consents include an extension and subdivision, meaningful when judging how the property has evolved.
Know exactly what you're buying at Old Mill House
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
Energy performance
Old Mill House's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heat pump installed, significantly improving energy efficiency
Changed to a more efficient fuel source
Heating controls upgraded for better temperature management
More low energy lighting installed
Solar PV panels (50 kWp) installed
Floor insulation added or improved
Heating system changed
Connected to mains gas supply
Heating controls changed
Hot water system changed
Solar PV panels (40 kWp) installed
Planning history
A recent planning application at Old Mill House was refused — worth checking the council file.
- Jun 2023ConditionsIn report
Discharge of condition 9 (Access and car parking space) relating to application MMA/344408/20
- Agent
- HNA Architects Ltd
- Documents
- 4 docs on file
- Reference
- CND/351165/23
- Sept 2021OutbuildingFullIn report
Erection of new detached double garage with workshop space
- Agent
- HNA Architects Ltd
- Documents
- 6 docs on file
- Reference
- HOU/346468/21
We flagged 2 things worth checking at Old Mill House
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
- A planning decision worth checking
30-day money-back guarantee
Sales history & valuation
Old Mill House's estimated value is more than triple its earliest registered sale price (1999).
£720,000
Modelled from EPC, postcode comparables.
£235,000
Recorded with HM Land Registry.
Sales timeline
26 August 1999Most recent
£235,000
Median price across the last 5 sales in OL3 5JY: £325,000 (2025–2021).
Nearby sales in OL3 5JY
7 Shaw Lee, Kiln Green, Diggle, Oldham, OL3 5JY
Sold Jun 2025
£210,0002 Shaw Lee, Kiln Green, Diggle, Oldham, OL3 5JY
Sold Mar 2025
£360,000Waterside Cottage, Kiln Green, Diggle, Oldham, OL3 5JY
Sold Aug 2024
£325,000Hillside Cottage, Kiln Green, Diggle, Oldham, OL3 5JY
Sold Aug 2022
£680,0006 Shaw Lee, Kiln Green, Diggle, Oldham, OL3 5JY
Sold Aug 2021
£190,000
Everything we know about Old Mill House, 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
- A planning decision worth checking

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The neighbourhood at a glance
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Nearest stop
0.4 km
Sunfield Lane — bus stop.
Closest school
0.3 km
Diggle School. 5 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
47.1dB

Night-time· 23:00 – 07:00
37.3dB