# Basement Construction in Chorleywood

Single-storey, double-storey and lightwell basement excavations under existing London homes. Delivered for Chorleywood (WD3), Home Counties, by HXL Construction under a single JCT contract, coordinated with Three Rivers District Council.

## Overview
HXL delivers basement construction in Chorleywood and across the wider Home Counties. Basement construction under existing London townhouses, semi-detached and detached homes is high-margin, technically demanding work that HXL routinely delivers. Single-storey excavations under footprint, double-storey schemes, lightwell and sub-pavement vault construction in conservation-area streets. All schemes include temporary-works design, structural propping, BS 8102-compliant waterproofing, and party wall coordination across all affected neighbours.

## Capability
- Single-storey basement excavation under existing footprint
- Double-storey basement schemes
- Lightwell and sub-pavement vault construction
- Temporary works and propping design
- BS 8102 Type C cavity-drainage waterproofing
- BS 8102 Type A and Type B tanked waterproofing
- Underpinning to existing foundations
- Party wall award coordination across all neighbours

## Chorleywood: local context
**Property stock.** Heronsgate private estate, Arts-and-Crafts Metroland detached homes, 1930s mock-Tudor, contemporary rebuilds on half-acre-plus plots. Chilterns AONB sits at the western edge.

**Planning and conservation.** Chorleywood Common protected open space. Conservation area pockets in the historic village core. Green Belt surrounds the built-up area. Local planning authority: Three Rivers District Council.

**Typical scope in Chorleywood:**
- Ground-up rebuilds on mature Metroland plots
- Substantial rear and wrap-around extensions
- Basement excavations under existing footprint
- Pool houses, outbuildings and landscape works
- Loft conversions within roof-form constraints

## Process
01. **Survey & design** — Ground investigation, structural engineering design, party wall service, planning consent where the scheme falls outside permitted development.
02. **Excavation** — Underpin, install temporary works, excavate, remove spoil, construct retaining walls.
03. **Waterproofing & fit-out** — BS 8102 system installation, M&E first fix, plant install, second fix and finishes.
04. **Sign-off** — Structural sign-off, Building Control completion, waterproofing system warranty, 12-month workmanship warranty.

## FAQ
**Does HXL carry out basement construction in Chorleywood?** Yes. HXL delivers basement construction across Chorleywood (WD3) and the wider Home Counties, as a principal contractor under a single JCT contract.

**Who is the local planning authority for Chorleywood?** Three Rivers District Council. Chorleywood Common protected open space. Conservation area pockets in the historic village core. Green Belt surrounds the built-up area.

**What properties does HXL work on in Chorleywood?** Heronsgate private estate, Arts-and-Crafts Metroland detached homes, 1930s mock-Tudor, contemporary rebuilds on half-acre-plus plots. Chilterns AONB sits at the western edge.

## Related
- Basement Construction (overview): https://hxlconstruction.co.uk/services/basement-construction
- Construction in Chorleywood: https://hxlconstruction.co.uk/areas/chorleywood

Contact: info@hxlconstruction.com · +44 7845 585147 · HXL Construction Ltd, 102 Vine Lane, Uxbridge, London UB10 0BE