# Basement Construction in Highgate

Single-storey, double-storey and lightwell basement excavations under existing London homes. Delivered for Highgate (N6), London, by HXL Construction under a single JCT contract, coordinated with London Borough of Haringey / London Borough of Camden.

## Overview
HXL delivers basement construction in Highgate and across the wider London. 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

## Highgate: local context
**Property stock.** Georgian and Regency listed townhouses in the Village, Victorian stucco-fronted terraces along Highgate Hill, Arts-and-Crafts detached on Fitzroy Park, 20th-century modernist listed stock. Significant Grade II and II* coverage.

**Planning and conservation.** Highgate Village Conservation Area (split across Haringey and Camden LB boundaries). Article 4 directions throughout. High proportion of listed buildings. Local planning authority: London Borough of Haringey / London Borough of Camden.

**Typical scope in Highgate:**
- Grade II listed internal refurbishment
- Basement excavations on listed and unlisted townhouses
- Heritage joinery, sash window and stucco repair
- Conservation-sensitive extensions
- Modernist listed building retrofit

## 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 Highgate?** Yes. HXL delivers basement construction across Highgate (N6) and the wider London, as a principal contractor under a single JCT contract.

**Who is the local planning authority for Highgate?** London Borough of Haringey / London Borough of Camden. Highgate Village Conservation Area (split across Haringey and Camden LB boundaries). Article 4 directions throughout. High proportion of listed buildings.

**What properties does HXL work on in Highgate?** Georgian and Regency listed townhouses in the Village, Victorian stucco-fronted terraces along Highgate Hill, Arts-and-Crafts detached on Fitzroy Park, 20th-century modernist listed stock. Significant Grade II and II* coverage.

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

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