Air conditioning in Croxley Green
We install, service and repair air conditioning in Croxley Green homes and businesses, from Dickinson Square's mill cottages to the houses around the green. Here's how the two conservation areas, an Article 4 direction and permit parking shape an install.
- Dickinson Square conservation area
- 1995
- parish residents (Census 2021)
- 13,534
- single room, from
- £1,850
- annual service, from
- £119
Three Rivers in official figures
- households (2021 Census)
- 36,859
- live in a flat
- 20 in 100
- live in a house
- 79 in 100
- listed building entries
- 350
Of 36,859 households in the 2021 Census, 79 in 100 lived in a house (26 detached, 35 semi-detached, 18 terraced) and 20 in 100 in a flat. Most installs here are on houses, where a back or side wall is usually the simplest place for the outdoor unit.
In a conservation area an outdoor unit can't go on a wall or roof facing a road without planning permission, and an Article 4 direction can remove permitted development rights altogether. Check your postcode to see whether either applies to your street.
Figures for the whole Three Rivers council area. Sources: ONS Census 2021, table TS044 (accommodation type); Historic England's National Heritage List entries within the council boundary, through planning.data.gov.uk (one entry can cover several buildings). Checked October 2026.
A village green that became a paper-mill community
The council's 1996 appraisal describes Croxley Green as an ancient, elongated village green, recorded as 'Croc's Lea' and given to the monastery of St Albans in about 790. It stayed largely rural until the canal crossed Croxley Moor in the 1790s.
In 1830 John Dickinson opened Croxley Mills on the canal's east bank, and by 1887 his company had concentrated its paper-making there. The parish was created in 1872 with All Saints Church, and the mills drove the growth of New Road and the village around it. They closed in 1980 and were demolished in 1982. Today Croxley Green is a commuter village on the Metropolitan line.
Croxley Green homes and what they mean for an install
| Type of home | Typical streets | What it means for the install |
|---|---|---|
| Late Victorian mill workers' houses | Dickinson Square and the original part of Dickinson Avenue | Conservation area with an Article 4 direction. Units go at the rear, reached through the arches between houses. |
| Detached houses in large gardens | Around the green, up to Croxley House and Little Green | Conservation area. Plenty of room for a rear or side position out of sight of the green and the road. |
| Late Victorian to interwar terraces and semis | New Road, Watford Road and the streets between them | Usually outside the conservation areas. A back wall or ground pad, and a multi-split for several bedrooms. |
| Flats and newer houses | Lindiswara Court, Cherry Croft and newer blocks | Flats need the freeholder's consent first. Cherry Croft's 2000 houses sit inside the Dickinson Square boundary. |
Planning: Three Rivers District Council
Three Rivers District Council handles planning in Croxley Green. A heating-capable outdoor unit on a house is often permitted development if it is not used only for cooling, is no bigger than 1.5 m³ and passes the MCS 020(a) noise check of 37 dB(A) at neighbours' windows. A semi-detached or terraced house can have one heat pump, a detached house two.
In a conservation area the unit can't go on a wall or roof facing the road without permission. Croxley Green also has its own neighbourhood plan, listed by Three Rivers, which counts when the council decides an application.
Dickinson Square: an Article 4 direction since 1996
Dickinson Square was built from 1887 on Milestone Field for Croxley Mills' workers, designed by George Hubbard, the architect of the mill extensions. Its houses are yellow brick with terracotta dressings around a railed green. Three Rivers made it a conservation area on 15 June 1995. None of its buildings is listed.
An Article 4 direction dated 28 March 1996 covers 1 to 54 Dickinson Square. It removes rights for alterations and roof changes that face the road, chimneys, front gates, walls and fences, and painting the outside. The council's appraisal says its main aim is to keep the original windows and doors. It doesn't name heat pumps, so ask the council before fitting anything to the front.
The Croxley Green conservation area
The larger conservation area was designated on 22 January 1980. It runs from All Saints Church in the south to Croxley House, Little Green and the fields beyond in the north, and the appraisal calls it overwhelmingly green and open, with mostly detached houses in local red brick and yellow stock brick.
It warns against building on garden land taken from detached houses, so keep an outdoor unit tucked against the house rather than out in the garden where it can be seen from the green. Trees in a conservation area are protected too: a unit placed near one needs care with the roots and branches.
Sites proposed in the draft Local Plan
Three Rivers' Local Plan 2026 to 2042 went out for its final (Regulation 19) consultation from 31 July to 25 September 2026 and has not been examined yet, so these are proposals, not decisions. The plan's Croxley Green section proposes:
- Land at Rousebarn Lane and Little Green Lane: about 600 homes, with a primary school and a country park
- Land at Croxley Station, Watford Road: about 163 homes
- Cinnamond House: about 80 homes
- Land south of Scots Hill: about 30 homes, plus a few smaller sites
Croxley Business Park and local shops
We fit and service air conditioning for offices at Croxley Business Park, which the draft plan keeps as an employment site, and for shops, cafes and clinics on New Road. Since 29 March 2024 an Article 4 direction has stopped offices at the business park becoming homes without planning permission. Commercial installs are done in business hours, and we can keep your F-Gas records.
Permit parking on install day
Three Rivers runs two permit zones in the village. Zone CG covers Dickinson Square, Gonville Avenue, Hazelwood Road, Beechcroft Avenue, The Crescent, Dorrofield Close and parts of New Road and Watford Road. Zone W covers Winton Drive, Winton Approach, Springfield Close and part of Girton Way. Tell us your zone when you book so we can plan where the van unloads the outdoor unit.
What air conditioning costs in Croxley Green
Our starting prices are the same here as across Hertfordshire and London. Home prices include VAT. Business prices are plus VAT. The survey turns them into a fixed written price.
- from£1,850inc. VAT
A bedroom or study
2.5 kW wall unit, 5 m pipe, fitted in a day
- from£2,050inc. VAT
A living room
3.5 kW wall unit
- from£3,650inc. VAT
Two rooms, one outdoor unit
Multi-split
- from£5,100inc. VAT
Three rooms
Multi-split
- from£2,350inc. VAT
Floor-standing unit
2.5 kW console
- from£1,795+ VAT
Commercial wall unit
Fitted in business hours
- from£2,750+ VAT
Ceiling cassette
In a suitable suspended ceiling
- from£119inc. VAT
An annual service
Keeps the manufacturer warranty valid
Areas and postcodes we cover
We cover the whole village and the places around it, including:
- WD3: Croxley Green, Dickinson Square, Little Green and the streets around Croxley station
- Croxley Business Park and the Watford Road end of the village
- Nearby: Rickmansworth, Watford, Chorleywood and Abbots Langley
Croxley Green questions
Do I need planning permission for air conditioning in Croxley Green?
Often not, if the unit also heats and meets the size, position and noise limits. You need permission for a listed building, a cooling-only unit, or a unit facing the road in one of the two conservation areas. Applications go to Three Rivers District Council.
I live in Dickinson Square. Can I have air conditioning?
Usually, yes, at the back. The 1996 Article 4 direction covers changes that face the road, such as windows, doors, front walls and painting, and the conservation area rules stop a unit on a road-facing wall without permission. A rear wall or ground pad, reached through the arches, is the usual answer. We check with the council if anything is borderline.
My house faces the green. Where would the outdoor unit go?
On a side or rear wall, close to the house and out of sight from the green. The conservation area protects the open, green setting, so we avoid putting units out in the garden or on the front. We plan the pipe route through the wall behind the indoor unit, so nothing shows inside.
How much does air conditioning cost for a semi on New Road?
A single bedroom starts from £1,850 including VAT, with a 5 m pipe run. Two rooms on one outdoor unit start from £3,650 and three rooms from £5,100. We size each room at the survey and give you a fixed written price.
Do you fit air conditioning at Croxley Business Park?
Yes. We survey the space, check with the landlord or managing agent where condensers can go, and fit during business hours. Commercial wall units start from £1,795 plus VAT and ceiling cassettes from £2,750 plus VAT.
Can you service or repair my existing system?
Yes. An annual service starts at £119 including VAT, plus £59 for each extra indoor unit on the same visit. We repair most brands, whoever fitted them, and confirm the cost of the repair visit when you book.