Typical piling durations by method

The time required depends on the piling method, pile quantity, depth, diameter, site access, ground conditions and the amount of supporting work required. The ranges below are general planning estimates rather than fixed guarantees.

How long does mini piling take for a house?

Mini piling is commonly used for London house extensions, basement works, underpinning and projects where access is limited. A relatively simple scheme with 6–12 piles may take around two to five working days on site once the working platform, design information and access arrangements are ready.

For budget planning alongside programme planning, see our guide to mini piling costs in London.

How long do CFA and bored piling projects take?

CFA and bored piling projects are generally larger than domestic mini piling schemes. A small commercial package may be completed within roughly one to three weeks, while a project with a high pile count, greater depths or complex reinforcement requirements can take considerably longer.

Production is affected by pile diameter, drilling depth, concrete supply, reinforcement cage installation, spoil handling and the distance between pile positions. The rate achieved on the first day is not always representative because initial setup, trial operations and adjustments may be required.

What happens before piling begins?

For many London projects, the pre-construction stage takes longer than the piling installation itself. A realistic programme should allow for investigation, engineering, neighbour procedures and logistics before a start date is fixed.

Ground investigation

A piling contractor and structural engineer need reliable information about the soil profile, groundwater and likely founding strata. Boreholes, trial pits, laboratory testing and utility checks may be required before the pile design is finalised.

Without adequate information, pile depths may remain provisional and the risk of redesign or delay increases. Read our detailed guide to ground investigations required before piling in London.

Structural design and technical review

The engineer must establish design loads, pile type, diameter, depth, reinforcement and the arrangement of caps or ground beams. The contractor may then review buildability, equipment access and installation sequence.

Party wall procedures

Piling near adjoining properties may fall within the scope of the Party Wall etc. Act 1996. Where notices, surveyors and awards are required, the process can add six to ten weeks and sometimes longer, particularly if information is incomplete or appointments are delayed.

Party wall matters should be started early rather than left until the piling contractor is ready to mobilise. See our practical guide to party wall awards and piling works in London.

Planning conditions and local approvals

The piling method may need to comply with planning conditions, a construction management plan, noise restrictions, traffic arrangements or environmental requirements. Basement and central London projects can involve particularly detailed logistics and neighbour-management obligations.

For a broader explanation of methods and regulations, read our complete guide to piling in London.

What can extend a piling timeline?

Restricted access

Narrow side passages, low headroom, occupied buildings, basement locations and limited crane access can reduce productivity. Equipment may need to be dismantled, moved in smaller sections or replaced with a lower-output rig that fits the site.

London clay and variable ground

London clay is familiar to piling contractors, but actual conditions vary between sites. Made ground, soft layers, groundwater, buried foundations and local obstructions may affect drilling speed and pile depth.

Underground obstructions and services

Old footings, concrete slabs, drainage, utility routes and undocumented structures can stop work until the obstruction is investigated or removed. A utility survey and sensible trial excavation can reduce this risk, but not every obstruction can be identified in advance.

Working-hour restrictions

Noisy construction work is commonly restricted by London boroughs. For example, Camden allows noisy building work from 8am to 6pm Monday to Friday and from 8am to 1pm on Saturdays, with no unauthorised noisy work on Sundays or bank holidays. Exact conditions vary by borough, planning permission and site-specific agreements, so the relevant council requirements should be checked before programming the works.

See the London Borough of Camden guidance on noisy building works.

Weather and concrete supply

Heavy rain can affect site access, excavation stability, spoil handling and working platforms. Concrete deliveries may also be disrupted by London traffic, road restrictions or supplier availability. A delayed concrete pour can affect the planned sequence of several piles.

Changes after work starts

Unexpected ground conditions, revised structural loads or clashes with existing foundations may require engineering review. Even a small design change can interrupt production if revised drawings and approvals are needed before work continues.

Example timeline for a London residential mini piling project

The following is an illustrative programme for a modest house extension. Actual durations vary.

1. Initial enquiry and site information – 2 to 5 days: photographs, drawings, postcode, access details and basic project requirements are reviewed.
2. Site visit and preliminary assessment – 1 day: access, working space, existing structures and likely mobilisation requirements are checked.
3. Ground investigation – 1 to 3 weeks: booking, site work, laboratory results and reporting.
4. Engineering and pile design – 1 to 2 weeks: pile loads, depths, reinforcement and caps or beams are developed.
5. Party wall process – commonly 6 to 10 weeks where required: this can run alongside design and procurement.
6. Final quotation and scheduling – several days to 2 weeks: scope, rig selection, concrete, reinforcement and labour are confirmed.
7. Site preparation and mobilisation – 1 to 2 days: access, protection, working platform and equipment setup.
8. Mini piling installation – approximately 2 to 5 working days: based on a straightforward 6–12 pile scheme.
9. Pile trimming, caps and ground beams – several days to 2 weeks: depending on design and curing requirements.
10. Testing and handover – as specified: results and records are completed before follow-on work proceeds.

Although the rig may only operate for a few days, the full process from initial investigation to completed foundation work can therefore take several weeks or months.

Can piling work be completed faster?

The best way to reduce delay is to complete the necessary preparation early. Before requesting a firm mobilisation date, the project team should have suitable drawings, ground information, confirmed pile loads, access details and clarity on party wall or planning requirements.

Frequently asked questions

How long does mini piling take for a house extension?

A straightforward residential scheme with around 6–12 mini piles may take approximately two to five working days on site. Additional time is normally required for preparation, pile caps, ground beams, curing and any testing.

How long does the complete piling process take?

The physical installation may take days or weeks, but the complete process can take several weeks or months once ground investigation, engineering, party wall matters, approvals and contractor scheduling are included.

Can piling be done in one day?

A very small and uncomplicated operation may involve only one day of drilling, but mobilisation, setup, concrete placement, records and follow-on foundation work mean the overall package is rarely a genuine one-day project.

Does bad weather stop piling?

Some piling work can continue in light rain, but severe weather may make the working platform unsafe, hinder spoil removal or disrupt concrete deliveries. The contractor must assess whether conditions allow safe and controlled installation.

Does a party wall award delay piling?

It can. Where a party wall award is required, allowing approximately six to ten weeks is sensible, although more complex or disputed matters can take longer. The process should begin as early as possible.

Request a piling assessment in London

Every piling programme depends on the design, site access, pile quantities and ground conditions. KHB Piling can review your drawings and project information, identify the likely installation method and provide a realistic indication of the on-site duration.

For an initial assessment, send the project address, structural drawings, ground investigation information, expected start date and photographs showing access to the proposed piling area.

Contact KHB Piling for a free, no-obligation quotation.