Updated 22 October 2026 · 97 new leads in the last 30 days
Construction Leads in Three Rivers
Access construction leads in Three Rivers by tracking newly submitted planning applications. See which homeowners and developers across the district are preparing extensions, loft conversions, and new builds, and get in touch before they begin shortlisting builders.
- New planning applications added frequently from Three Rivers District Council
- Connect with homeowners at the early planning stage
- No shared enquiries or competitive bidding
Data sourced from Three Rivers District Council planning records and refreshed regularly.
97
New Leads (30 Days)
£121,649
Average Project Value
29
High Value Projects
Over £100k
Extensions
Most Common Project
Construction Trends in Three Rivers
Three Rivers takes its name from the confluence of the Chess, Colne, and Gade rivers alongside the Grand Union Canal, and Rickmansworth's Aquadrome remains a focal point for the district's waterside character. Chorleywood, a few miles east, is known for its large area of common land — 76 hectares of grassland and woodland within a mile of the M25 — with a conservation area covering much of the village around it. Croxley Green keeps a similarly protected village character. Much of the district sits within London's Metropolitan Green Belt, which restricts new-build development outside existing settlement boundaries and keeps construction activity focused mainly on extending and refurbishing the district's substantial detached and semi-detached housing stock.
Project Type Breakdown
Here's a breakdown of the most common types of construction projects in Three Rivers over the past 30 days.
In Three Rivers, Extensions are the most common project type, appearing in 77 of the 97 leads tracked in the last 30 days, with Loft Conversions also showing consistent demand alongside Garden Rooms. Projects can fall into more than one category, so these figures don't need to add up to the total.
Most Active Architects and Planning Consultants in Three Rivers
The architects and planning consultants submitting the most construction-related applications in Three Rivers, based on recent planning records.
- 1Architects Corporation Ltd
- 2YOOP Architects
- 3Noades Architects
- 4Dusek Design Associates Ltd
- 5H-JAG Architecture
- 6KG Plan & Design Ltd
- 7KDB Building Designs Ltd
- 8Malathy Group Limited
- 9KRN Design Studio
- 10Architecture for the Senses
Project Value Insights
Understanding typical project values in Three Rivers helps you prioritise the most profitable leads and manage your workload effectively. These ranges are a general guide to the scale of work involved — individual project costs vary by design, specification, and site conditions.
- £25k – £50kSmall extensions, porches, and internal alterations
- £50k – £100kRear extensions and loft conversions
- £100k – £250kLarge extensions and full property refurbishments
- £250k+New builds and high-end residential projects
Higher-value projects are especially common in Chorleywood and Rickmansworth, where larger properties and more extensive upgrades are the norm.
Recent Planning Applications in Three Rivers
Extensions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Single Storey Front Extension | 69 Sycamore Road Croxley Green Rickmansworth Hertfordshire WD3 3TE | £50k–£100k | Construction of single-storey front extension and garage conversion. | Approved |
| Single Storey Front Extension | 76 Hayling Road South Oxhey Watford Hertfordshire WD19 7BP | £50k–£100k | Part retrospective application for construction of single storey front and rear extensions and outbuilding. | Approved |
| Wrap-Around Extension | 76 Eastwick Crescent Mill End Rickmansworth Hertfordshire WD3 8YJ | £100k–£250k | Demolition of storage building and construction of a single storey wrap around extension. | Approved |
| Wrap-Around Extension | Picketty House 22 Wyatts Road Chorleywood Rickmansworth Hertfordshire WD3 5TE | £100k–£250k | Demolition of garage and construction of a two storey side and rear extension. | Approved |
| Single Storey Rear Extension | Watford Rural | £50k–£100k | Retrospective application for a single-storey rear extension to a dwelling. | Approved |
Single Storey Front Extension
69 Sycamore Road Croxley Green Rickmansworth Hertfordshire WD3 3TE
Construction of single-storey front extension and garage conversion.
Single Storey Front Extension
76 Hayling Road South Oxhey Watford Hertfordshire WD19 7BP
Part retrospective application for construction of single storey front and rear extensions and outbuilding.
Wrap-Around Extension
76 Eastwick Crescent Mill End Rickmansworth Hertfordshire WD3 8YJ
Demolition of storage building and construction of a single storey wrap around extension.
Wrap-Around Extension
Picketty House 22 Wyatts Road Chorleywood Rickmansworth Hertfordshire WD3 5TE
Demolition of garage and construction of a two storey side and rear extension.
Single Storey Rear Extension
Watford Rural
Retrospective application for a single-storey rear extension to a dwelling.
Loft Conversions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Loft Conversion | 37 Russell Road Moor Park Northwood Hertfordshire HA6 2LP | £250k–£1m | Construction of first-floor side extension, part two storey and part single storey rear extension, and various alterations including a swimming pool. | Approved |
| Loft Conversion | Three Rivers | £50k–£100k | Variation of Conditions 2 and 5 to amend rear dormer, internal layout, create a three-bedroom dwelling and alter boundary, landscaping and driveway. | Approved |
| Loft Conversion | 2 Artichoke Dell Dog Kennel Lane Chorleywood Hertfordshire WD3 5EQ | £100k–£250k | Full planning application for a single-storey rear extension and loft extension with front and rear dormers. | Approved |
| Loft Conversion | 12 South Approach Moor Park Northwood Hertfordshire HA6 2ET | £100k–£250k | Part single, part two-storey rear extension with loft conversion including rooflights and solar panels, plus internal and fenestration alterations. | Withdrawn |
| Loft Conversion | Briercot 78 Quickley Lane Chorleywood Rickmansworth Hertfordshire WD3 5AF | £100k–£250k | Single-storey side/rear extension, garage conversion and comprehensive loft conversion with ridge increase, hip-to-gable, dormers and rooflights. | Approved |
Loft Conversion
37 Russell Road Moor Park Northwood Hertfordshire HA6 2LP
Construction of first-floor side extension, part two storey and part single storey rear extension, and various alterations including a swimming pool.
Loft Conversion
Three Rivers
Variation of Conditions 2 and 5 to amend rear dormer, internal layout, create a three-bedroom dwelling and alter boundary, landscaping and driveway.
Loft Conversion
2 Artichoke Dell Dog Kennel Lane Chorleywood Hertfordshire WD3 5EQ
Full planning application for a single-storey rear extension and loft extension with front and rear dormers.
Loft Conversion
12 South Approach Moor Park Northwood Hertfordshire HA6 2ET
Part single, part two-storey rear extension with loft conversion including rooflights and solar panels, plus internal and fenestration alterations.
Loft Conversion
Briercot 78 Quickley Lane Chorleywood Rickmansworth Hertfordshire WD3 5AF
Single-storey side/rear extension, garage conversion and comprehensive loft conversion with ridge increase, hip-to-gable, dormers and rooflights.
Other Projects
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| New Build | 5 Sandy Lodge Lane Moor Park Northwood Hertfordshire HA6 2JA | £250k–£1m | Demolition of existing dwelling and erection of two storey detached dwelling. | Refused |
| Garden Room | 36 Blackford Road South Oxhey Watford Hertfordshire WD19 6YN | £50k–£100k | Retrospective application for a replacement detached outbuilding as an annexe. | Approved |
| New Build | Toledo The Green Sarratt Rickmansworth Hertfordshire WD3 6BS | £250k–£1m | Demolition of existing dwelling and buildings and construction of a detached two-storey dwelling with basement, solar panels and landscaping, including access alterations. | Approved |
| Heritage | York House School Sarratt Road Rickmansworth Hertfordshire WD3 4LW | £25k–£50k | Listed building consent application for installation of solar panels on the roof. | Approved |
| Garden Room | 11 Hazelwood Road Croxley Green Rickmansworth Hertfordshire WD3 3EA | £50k–£100k | Construction of a detached annexe (outbuilding) associated with the dwelling. | Approved |
New Build
5 Sandy Lodge Lane Moor Park Northwood Hertfordshire HA6 2JA
Demolition of existing dwelling and erection of two storey detached dwelling.
Garden Room
36 Blackford Road South Oxhey Watford Hertfordshire WD19 6YN
Retrospective application for a replacement detached outbuilding as an annexe.
New Build
Toledo The Green Sarratt Rickmansworth Hertfordshire WD3 6BS
Demolition of existing dwelling and buildings and construction of a detached two-storey dwelling with basement, solar panels and landscaping, including access alterations.
Heritage
York House School Sarratt Road Rickmansworth Hertfordshire WD3 4LW
Listed building consent application for installation of solar panels on the roof.
Garden Room
11 Hazelwood Road Croxley Green Rickmansworth Hertfordshire WD3 3EA
Construction of a detached annexe (outbuilding) associated with the dwelling.
Data sourced from Three Rivers District Council planning records and refreshed regularly.
Featured Projects
A snapshot of recent construction opportunities across Three Rivers.
Construction of single-storey front extension, conversion of garage into habitable accommodation, extension of driveway
£50k–£100k69 Sycamore Road Croxley Green Rickmansworth Hertfordshire WD3 3TE
Construction of single-storey front extension and garage conversion.
Part Retrospective: Construction of single storey front and rear extensions and outbuilding
£50k–£100k76 Hayling Road South Oxhey Watford Hertfordshire WD19 7BP
Part retrospective application for construction of single storey front and rear extensions and outbuilding.
Demolition of existing storage building and conservatory; construction of rear and side extension; alterations to fenestration, including construction of front bay window; construction of rear dormer and front roof lights
£100k–£250k76 Eastwick Crescent Mill End Rickmansworth Hertfordshire WD3 8YJ
Demolition of storage building and construction of a single storey wrap around extension.
Demolition of existing dwelling and erection of two storey detached dwelling with associated alterations to the driveway and amenity space.
£250k–£1m5 Sandy Lodge Lane Moor Park Northwood Hertfordshire HA6 2JA
Demolition of existing dwelling and erection of two storey detached dwelling.
Examples of projects at an early stage before wider competition builds.
See All 97 Construction Leads in Three Rivers
Unlock full details and connect with homeowners while projects are still taking shape.
Get Access NowPlanning Application Status in Three Rivers
51%
Approved
44%
Pending
5%
Refused
Most planning applications in Three Rivers are approved, meaning a large proportion of these projects go ahead and become real building jobs. This creates strong opportunities for builders who contact homeowners early.
Reaching out while applications are still active helps you get ahead of the pack.
Based on planning applications submitted over the last 30 days.
Planning Approval Times in Three Rivers
Among applications tracked by BuildAlert in Three Rivers, the median time from submission to decision is 8 weeks. Smaller projects like extensions tend to be approved more quickly, while larger developments can take longer.
Based on approved applications with recorded decision dates over the last 3 months.
Domestic vs Commercial Projects in Three Rivers
In Three Rivers, the vast majority (89%) of planning applications are domestic projects such as extensions and loft conversions. Commercial developments make up a smaller portion but can offer higher-value opportunities for larger contractors.
Demand for Building Work in Three Rivers
Three Rivers' strong Metropolitan line commuter links into London support one of Hertfordshire's more affluent property markets, and the Green Belt restrictions covering much of the district reinforce a pattern of extending rather than moving among homeowners in Rickmansworth, Chorleywood, and Croxley Green. Chorleywood's conservation area and proximity to its protected common support particularly careful, higher-spec renovation work, while Rickmansworth's waterside setting near the Aquadrome adds a further draw for larger extension and refurbishment projects.
How to Win Jobs in Three Rivers
Contact Homeowners Early
Planning applications highlight upcoming work, giving you a chance to get in touch before builders are shortlisted.
Focus on Approved Applications
Approved applications can be particularly valuable because the project has cleared a major planning hurdle and may be moving closer to construction.
Target Higher-Value Projects
Filter by estimated project value to focus your outreach on jobs that match the size and type of work your business takes on.
How BuildAlert Works
Three simple steps to start winning more construction work in Three Rivers.
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We monitor Three Rivers District Council and surrounding authorities daily for new residential projects.
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Nearby Areas
Builders based in Three Rivers often take on work in nearby Hertfordshire areas such as Watford and Dacorum, helping maintain a consistent flow of projects.
Frequently Asked Questions
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