Local Engineering Context
Kent Geology & Substructure Drivers
Variable Chalk Downs, London Clay in North Kent, and Ragstone bedrock requiring tailored trench-fill vs piled substructure schedules.
South East England · England · NRM2 Section 5 (Foundations, Basements & Trenches)
Excavation Estimating for Kent Construction Tenders
Serving builders, specialist subcontractors, and developers working throughout Kent, our excavation estimating service delivers transparent NRM2 Section 5 (Foundations, Basements & Trenches) bills of quantities calibrated around strong mix of domestic extensions, conservation cottage barn conversions, multi-plot rural housing, and thames-corridor logistics shells.
Local Engineering Context
County Planning & Material Specifications
Kent Downs AONB & heritage conservation brickwork/peg-tile/weatherboarding material matching.
Local Engineering Context
Transport & Site Prelims Considerations
Rural lane narrow-tipper delivery splits vs M2/M20 strategic corridor arterial access.
Measurement & Deliverable Parameters
How are Kent excavation packages measured and delivered?
| Estimating Parameter | Technical Specification | Standard / Audit Basis |
|---|---|---|
| Measurement Section & Units | NRM2 Section 5 (Foundations, Basements & Trenches) measured in m3, m2, m, nr | Scaled GA plans at 1:50 / 1:100 or structural details in mm |
| Local Statutory Framework | Building Regulations (Approved Documents Parts A–S) & Building Safety Act (BSA) Gateways 1–3 | England statutory & local tender compliance notes |
| Wastage & Prelim Separation | Net quantities isolated with 5%–10% typical trade waste allowances | Kent County logistics and phased delivery allowances |
| Deliverables & Drawing Uploads | 100% open-formula Excel BoQ + colour-coded PDF overlays (up to 25 MB upload) | 24–48 hrs turnaround target for focused single-trade packages |
Calibration note: 1:50 and 1:100 architectural and structural drawings are scaled to 25 mm masonry tolerances and 100 mm thermal zones, isolating 5 percent to 10 percent wastage from net quantities.
What is measured in every Kent pack?
Deep basements beneath London townhouses, clay heave foundations near trees, and multi-utility service trenches require disciplined depth-band measurement. We measure exact trench profiles, underpinning sequences, trench sheets/shoring, and disposal offsite.
- Groups dig depths consistently (up to 1.0m, 1.0–2.0m, 2.0–4.0m, and beyond) as standard NRM2 practice.
- Includes working space clearances around external waterproofing membranes and trench sheet line setups.
Which drawings and UK project types are supported?
- Foundation plans & section details
- Basement retaining wall & secant/contiguous pile plans
- Below-ground drainage & statutory utility layouts
Suitable UK Project Types
Urban basement excavationsHouse extension strip/trench-fill footingsDrainage & utility trenching runsTraditional hit-and-miss underpinning
Which other trades do we estimate in Kent?
Where else near Kent is Excavation available?
Excavation Estimating FAQs for Kent
What does a Kent excavation estimate include?
Every workbook provides net measured quantities in m3, m2, m, nr, colour-coded PDF drawing mark-ups, separated material vs labour lines, and clarifications covering Kent site requirements.
Are clay-heave compressible boards (Claymaster/Cellcore) included with trench excavation?
Yes. Void-former and compressible heave protection boards specified near cohesive soils and trees are quantified directly alongside footing excavation.
Do you measure hit-and-miss underpinning sequences in bay runs?
Yes—linear underpinning walls are itemised by bay depth/width with dry-pack pinning allowances.