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Service

Basement

New space beneath the house — cinemas, gyms, wine rooms and guest suites, engineered, waterproofed and daylit properly. Engineered for Oxford's ground conditions and conservation constraints.

Excavator groundworks and basement underpinning excavation
  • Service

    Basement

  • Stages

    4 step process

  • Delivery

    Design & build

  • Coverage

    Oxford & Oxfordshire

Overview

Basement excavation, underpinning and luxury lower-ground conversion.

Basement work is engineering-led. We commission ground investigation, temporary works design and structural engineering before any excavation, and we monitor neighbouring structures throughout.

Type A, B and C waterproofing is combined with drainage, pumps and alarms to BS 8102, and lightwells or sunken courtyards are used wherever daylight can be introduced.

Excavator groundworks and basement underpinning excavation
Why It Works

What You Get

  • Engineered

    Ground investigation and temporary works design before excavation.

  • Dry for life

    Combined waterproofing strategy with maintainable drainage.

  • Neighbour managed

    Party wall awards, monitoring and clear communication.

  • Genuinely liveable

    Lightwells, ventilation and ceiling heights that feel above ground.

How We Work

The Basement Process

  1. 01

    Consultation

    Feasibility, ground investigation and party wall strategy.

  2. 02

    Design

    Structural and waterproofing design plus planning consent.

  3. 03

    Delivery

    Underpinning, excavation, structure and fit-out.

  4. 04

    Handover

    Commissioning of pumps and alarms, plus warranty documentation.

Selected Work

Recent projects with this scope

  • Completed single-storey bungalow rear extension with French patio doors in Kidlington, Oxfordshire
    Kidlington Bungalow Rear ExtensionKidlington, Oxfordshire
  • Full luxury kitchen refurbishment in Bicester featuring a waterfall quartz island
    Bicester Luxury Kitchen RefurbishmentBicester, Oxfordshire
  • Luxury bathroom refurbishment in Woodstock featuring walk-in rainfall shower
    Woodstock Luxury Bathroom & WetroomWoodstock, Oxfordshire
Completed single-storey bungalow rear extension with French patio doors in Kidlington, Oxfordshire by Oasis Builders

FROM CONCEPT TO CREATION

Private residence, Boars Hill, Oxford

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Planning a basement project?

Share the property details and your timescale — we'll come back with an honest view of scope, programme and budget.

  • Fixed-price proposals
  • RIBA-aligned process
  • 10-year workmanship warranty