What type of property is Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU?

Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU is a detached house.

What energy rating does Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU have?

The current EPC rating for Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU is F with a score of 35 out of 100, lodged in November 2017. The assessor estimates the property could reach a C. Source: EPC Register.

What is the floor area of Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU?

Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU has a recorded floor area of 232 m² (2,497 sq ft). That makes it about 338% larger than the median EPC-recorded property in WD17 3TU. Source: EPC Register.

How is Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU heated?

The latest EPC at Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU records mains gas as the main heating fuel. Source: EPC Register.

What planning history does Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU have?

Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU has 3 planning records on file (2 approved), most recent in October 2025. Source: PlanIt planning register.

What council tax band is Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU?

Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU is in council tax band D.

Where is Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU located?

Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU sits in Watford. It falls within the WD17 postcode district in Hertfordshire.

How safe is the area around Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU?

Police records around Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU show an average of 266 reported crimes per month over the last 14 months. Violent crime makes up roughly 29% of reports, the most common category. The overall trend is falling (13% versus the prior period). Source: Police UK.

Which schools serve Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU?

The closest primary school to Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU is Holy Rood Catholic Primary School (740m), one of 23 primaries within walking distance. The closest secondary is West Herts College (2.3km), with 3 secondaries in the surrounding area.

What transport links are near Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU?

The closest bus stop to Old Mill House, Lower Flat, Grove Mill Lane, WD17 3TU is Grove Mill Lane, 409m away. In total there are 30 bus stops within the surrounding area.

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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

From EPC

Floor area

232 m²

2497 sq ft

Energy rating

Score 35

Council tax

Band D

Tenure

Owner Occupied

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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.

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Everything you need to know about Old Mill House

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

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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.

Current Certificate

Nov 2017

EPC Rating

F35

Main Heating

Gas

Main Fuel

Gas

Hot Water

Average

Windows

Very Poor

CO2 Emissions

17.0 t/year

Occupancy

Owner Occupied

Certificate validity

Valid until 1 November 2027

1 year remaining

Get a survey for this property

Level 3 Building Survey

Victorian-eraGround Floor FlatEPC FPre-1919 buildSolid (non-cavity) walls

Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.

From £1,155 · Includes VAT

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.

3 applications on record at Old Mill House, Lower Flat, Grove Mill Lane, Watford, WD17 3TU

3decisions28documents1nearby

Flagged:RetrospectiveConservation area

Feb 2008
Tree WorksTrees
Outcome in report
To fell a large Sycamore tree.
Reference
08/0054/TPO
Full record in report
More recent applications — locked
Tree WorksOct 2025I 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 youDecision
AmendmentMar 2023Decision

Unlock Old Mill House, Lower Flat, Grove Mill Lane, Watford, WD17 3TU's full planning history

You're seeing the shape of it. The report has the substance.

Every decision — granted, refused or withdrawn (3 on record)
All 3 applications on this property in full, plus 1 notable nearby
The 28 documents, officer reports & conditions
What the pattern means for extending or converting here

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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

£674,000

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).

Nearby sales in WD17 3TU

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

Pick your report · from £14.99

One time fee only - money back guarantee

The data behind every report

Comparables

Similar properties nearby

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

£528k

Old Mill House, Upper Flat, Grove Mill Lane

WD17 3TU

Flat

£720k

10 Beechpark Way

WD17 3TY

4 bed

£600k

10 Berceau Walk

WD17 3BL

3 bed

£802k

1 Orchard Close

WD17 3DU

3 bed1 bath

£826k

1 Berceau Walk

WD17 3BL

3 bed1 bath

£832k

10 Bellmount Wood Avenue

WD17 3BW

3 bed1 bath

£544k

1 Grove Wharf, Hempstead Road

WD17 3NL

£850k

1 Bellmount Wood Avenue

WD17 3BN

4 bed

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

266/mo

Falling 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

A Local Area 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· 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.