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Building and renovation

Groundworks and foundations

Digging, foundations, drainage runs and hardcore.
Post a task Groundworks and foundations by county

Whether this needs a licence in Ireland

Ireland

No licence required

Taken from the statute below; not yet reviewed by a lawyer

Irelandwww.cru.ieChecked

Groundworks and foundations: what the job involves

Digging and preparing the ground for an extension, garden room, driveway or drainage: excavation, foundations, drainage runs, levelling and hardcore. Usually done with a mini-digger and dumper, and the first trade on most building projects.

Also asked for as: digger hire with driver · excavation · site clearance · driveway base · mini digger

How the job is usually done

  1. Locate services: ask the customer, check utility maps and scan with a cable avoidance tool before any digging.
  2. Set out the work from the drawings, with levels and boundaries agreed.
  3. Excavate foundations, trenches or reduced levels, and keep spoil separate for reuse or removal.
  4. Check the formation with the engineer or certifier where required, then pour foundations or lay pipes and bedding.
  5. Backfill and compact in layers; lay hardcore and blinding for slabs or driveways.
  6. Remove surplus spoil to an authorised facility and leave the site level and safe.

Groundworks and foundations: what is included

Usually included

  • Machine and operator for the excavation
  • Foundations, trenches and hardcore as quoted
  • Drainage pipe runs and manholes where specified
  • Removal of spoil as agreed

Usually not included — agree it separately

  • Rock breaking, unless allowed for
  • Diverting electricity, gas or water services, which the utility does
  • Engineer’s design and inspections
  • The building work on top of the foundations
  • Reinstating lawns, paving or driveways beyond the work area

Materials and who supplies them

  • Concrete, steel reinforcement, hardcore (Clause 804) and sand — usually supplied by the contractor
  • Drainage pipes, bends, manholes and bedding
  • Mini-digger, dumper, compactor and skip or grab lorry

How long it takes

A few days to a few weeks depending on the project; rock, a high water table, services to divert or wet weather add time.

When to book

Late spring to autumn when ground is drier; winter digging on clay turns sites to mud and slows everything.

Groundworks and foundations: the rules in Ireland

What the official sources say, checked against them on the date shown. A summary, not legal advice — follow the link to read the rule itself.

  • Excavations where somebody could be buried by an earthfall, and work near overhead power lines, are “particular risks”: the homeowner must appoint project supervisors in writing, and the contractor must support or batter the sides of deep trenches.

    Applies to: the homeowner, as client, and the contractor

    Safety, Health and Welfare at Work (Construction) Regulations 2013 — HSA guide for homeowners · hsa.ie · Checked 9 October 2026

  • Rubble, soil and stone leaving the site are waste and must be carried by a holder of a waste collection permit to an authorised facility. Ask for the permit number and keep the receipts.

    Applies to: the builder and the homeowner

    Waste Management (Collection Permit) Regulations — National Waste Collection Permit Office · nwcpo.ie · Checked 9 October 2026

  • Ireland has no separate party wall act: work to a wall, chimney or boundary shared with a neighbour is covered by the Land and Conveyancing Law Reform Act. The owner doing the work must make good any damage and may need the neighbour’s consent, or a court works order if consent is refused.

    Applies to: the homeowner

    Land and Conveyancing Law Reform Act 2009, sections 43 to 47 · irishstatutebook.ie · Checked 9 October 2026

What groundworks and foundations costs, and why

What jobs on Talqero came to

Not enough comparable jobs yet to publish a range here. Talqero shows a price range only once at least five comparable jobs, agreed prices or offers exist — a range from fewer would describe a handful of jobs, not the market. Post your job and compare the offers you get.

What affects the price

  • Volume to dig and to take away, and whether spoil can stay on site
  • Ground conditions: rock, soft ground, high water table
  • Access for machinery, and whether work is by hand
  • Drainage and services that need diverting or connecting
  • Engineer’s requirements for deeper or reinforced foundations
  • VAT: building work on a home is charged at the reduced 13.5% rate by a VAT-registered builder, unless materials are more than two-thirds of the price (Revenue’s two-thirds rule)
  • VAT: building work on a home is charged at the reduced rate of 13.5% by a VAT-registered business — unless the materials come to more than two-thirds of the price, when Revenue’s two-thirds rule applies the goods rate to the whole job. Ask whether a quote includes VAT.

Paperwork to ask for at the end

  • Waste transfer receipts for spoil taken off site
  • Photographs of foundations and drains before they were covered
  • Any engineer or certifier inspection record for the foundations
  • An as-built drawing of drain runs and manholes

Safety

  • Never enter a trench deeper than about knee height that is not supported or battered back.
  • Keep children and pets well away from a working digger and open excavations; fence the site at night.
  • Tell the contractor about any oil tank lines, septic tank, cables to a shed or garden lights before digging.

Groundworks and foundations: before you hire

Questions to ask a tradesperson

  • How will you find buried cables and pipes before digging?
  • What happens if you hit rock — is there a rate for breaking?
  • Is removing the spoil included, and where does it go?
  • Is VAT included?

What you can do yourself

Digging a small shed base by hand is a reasonable homeowner job; machine excavation and foundations for buildings are not.

What to put in your task

  • What is the groundwork for?
  • Do you have drawings or an engineer’s design?
  • How wide is the access to the work area?
  • Can soil stay on site?
  • Roughly what area is involved?

Photos that help

  • The work area from a few angles
  • The access route from the road, with a tape measure across the narrowest point
  • Any manholes, gullies, oil tank, poles or cables nearby

Groundworks and foundations by county

Choose your county for groundworks and foundations close to home.

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Questions about groundworks and foundations

Does groundworks and foundations need a licence in Ireland?

No licence is required for this work in Ireland (source: www.cru.ie). Ask instead for references and photographs of similar jobs.

How deep do extension foundations need to be?

It depends on the ground and the design. Strip foundations commonly go down to firm natural ground below the topsoil, deeper on clay, near trees or on filled ground. Your engineer or designer specifies them, and they are often inspected before the concrete is poured.

Who removes the soil?

Agree it in the quote. Soil and stone leaving the site is waste and must be carried by a permitted waste collector to an authorised facility. Reusing it on site to level the garden is cheaper where possible.

What if the digger hits a pipe or cable?

Stop work and keep away from a damaged electricity cable or gas pipe, and call the network emergency line. Good contractors scan for services and dig by hand near them, which is why you should tell them about anything you know is buried.

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