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Old Mill House, Lower Flat, Grove Mill Lane, Watford, WD17 3TU

3 planning records
Property type
Detached
Floor Ground
Habitable rooms
7
From EPC
Floor area
232 m²
2497 sq ft
Energy rating
F
Score 35
Council tax
Band D
Tenure
Owner Occupied
Overview

About Old Mill House

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

Old Mill House is a detached house in Watford (WD17 3TU). It has a recorded floor area of 232 m² (around 2497 sq ft), construction records dating it to before 1900 and council tax band D. The latest certificate (November 2017) shows an F (score 35), near the bottom of the EPC scale. The recommended improvements would lift it to C (score 78), a 3-band jump.

At 232 m² the property is well over the postcode median (54 m² across 10 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. 3 planning records sit against the property, 2 approved, 0 refused. Past consents include tree works, meaningful when judging how the property has evolved. The record references conservation-area consent, which constrain future alterations.

Before you decide

Everything you need to know about Old Mill House

The true value, the hidden risks and the full sale history, in one report.

Larger development activity nearbyEnvironmental risk flagged
£14.99one-off

30-day money-back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
  • Beautiful Places, source of nearby scenic places
Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

Old Mill House sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.

EPC Rating

A
B
C
D
E
F
F35
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Average
Windows
Very Poor
CO2 Emissions
17.0 t/year
Occupancy
Owner Occupied
Planning

Planning history

Applications and permits filed against Old Mill House, Lower Flat, Grove Mill Lane, Watford, WD17 3TU, sourced from the PlanIt planning register.

Old Mill House sits within a conservation area — exterior works face additional planning controls.

  1. Oct 2025
    Tree WorksTrees
    In report

    I have a large fir tree in my garden which I have been told is dying and should be felled. If the tree fell it would be a danger to the adjoining highway. I have a blanket TPO order affecting my property which is also situated in a conservation area. It is proposed that the tree would be felled and chopped up in my front garden. I have planted many new trees in my garden and have no proposals to plant a replacement tree. I want to fell the tree as soon as possible and I look forward to receiving consent to proceed. Thank you

    Conservation Area
    Documents
    6 docs on file
    Reference
    25/1686/DDD
    View planning record
  2. Mar 2023
    Amendment
    In report

    Part Retrospective: Replacement of existing timber fence with increase in height adjacent to the highway

    Retrospective
    Documents
    22 docs on file
    Reference
    22/2293/RSP
    View planning record
Before you offer

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
  • Environmental risk flagged
£14.99

30-day money-back guarantee

Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.

Old Mill House has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.

Current estimate

£900,000

Modelled from EPC, postcode comparables.

See how we calculated this

No sales recorded with HM Land Registry

That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.

Median price across the last 5 sales in WD17 3TU: £345,000 (2024–2020).

On the street

Versus other Grove Mill Lane homes

Four headline reads against 9 similar flats on this street, drawn from the latest EPC and Land Registry data.

Old Mill House is notably below the street on epc rating.

EPC Rating

35 (F)

Street avg 68 (D)

Strongly below

Floor Area

232 m²

Street avg 58 m²

Strongly above

CO₂ Emissions

17.0 t/year

Street avg 2.4 t/year

Strongly below

Habitable Rooms

7 rooms

Street avg 3 rooms

Strongly above
Before you decide

Everything you need to know about Old Mill House

The true value, the hidden risks and the full sale history, in one report.

Larger development activity nearbyEnvironmental risk flagged
£14.99one-off

30-day money-back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
  • Beautiful Places, source of nearby scenic places
Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£530k

Old Mill House, Upper Flat, Grove Mill Lane

WD17 3TU

Flat
£883k

1 Peace Drive

WD17 3XE

5 bed
£925k

1 Farm Field

WD17 3DF

2 bed
£875k

1 The Gardens

WD17 3DT

£939k

1 Stratford Way

WD17 3DH

4 bed
£853k

1 Berceau Walk

WD17 3BL

3 bed1 bath
£850k

1 Bellmount Wood Avenue

WD17 3BN

4 bed
£848k

10 Bellmount Wood Avenue

WD17 3BW

3 bed1 bath
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Watford district page.
Full Watford report

Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.

Crime

10/mo

Steady year-on-year across the wider district.

Nearest stop

0.4 km

Grove Mill Lane — bus stop.

Closest school

0.7 km

Holy Rood Catholic Primary School. 26 schools nearby.

Go deeper on the local area

The full report breaks down crime, transport links, schools and air quality in depth.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around WD17 3TU from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for WD17 3TU

Daytime· 07:00 – 23:00

48.5dB

Low
Night-time road noise heatmap for WD17 3TU

Night-time· 23:00 – 07:00

40.9dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about Old Mill House, Lower Flat, Grove Mill Lane, Watford, WD17 3TU. Each answer is also embedded as structured data for search engines.