Post Construction Cleaning Companies: A Homeowner's Guide

Post construction cleaning companies take on the clean that follows a new build, extension, renovation or fit-out: the fine mineral dust, plaster splashes, adhesive and silicone residue, offcuts and packaging that a normal domestic clean is not equipped to handle. For an Irish homeowner, the difficulty is rarely finding a cleaner at all, but matching a company's scope, equipment and insurance to the state the property is actually in. The sections below explain what the work covers, how to judge whether a company is suitable, what a proper quote should list, and the safety points to settle before anyone starts, so that post-construction cleaning can be booked with a clear idea of what is being bought.

What post construction cleaning actually covers

Post-build cleaning is normally split into two stages, and the first thing to establish is which stage a company is quoting for. A builders' clean, sometimes called a rough clean, happens while trades are still in and out: bulk offcuts and packaging are gathered, floors are swept and vacuumed, and the worst of the dust and surplus material is cleared so finishing trades have a workable space. It is not a finished standard, and the dust settles again within hours. The final clean, often called a sparkle clean, is the one that matters to a homeowner, and it usually happens after the snag list has been worked through, because snag repairs generate fresh dust of their own.

A proper final clean typically takes in:

• All horizontal surfaces worked from the top down: tops of units and wardrobes, shelves, sills, skirting, architraves, door frames, stair spindles, radiators, light fittings and extractor vents.
• The insides of fitted units, drawers and presses, once they have been emptied.
• Kitchen and bathroom fittings: sinks, taps, shower trays and screens, tiles and grout lines, sanitary ware, mirrors and splashbacks.
• Glass inside and out, including frames, sills and sliding-door tracks, along with protective film and stickers left on new glazing.
• Residues specific to building work: plaster splashes on floors, cement and grout haze, paint spots on glass and frames, adhesive and mastic smears, and leftover tile spacers.
• Floors cleaned according to their material, using vacuum, damp-mop or machine methods as the surface allows.
• External areas where they are in scope: paths, patios, driveways, boundary walls, external doors and bin stores.
• Removal of the remaining packaging and waste, where the quote includes it.
• A final walk-through with the homeowner before the company leaves.

Typical exclusions are high-level or roof glazing, the insides of ducts and service voids, attic spaces, anything needing scaffolding, and hazardous materials. Those should be named in writing rather than assumed.

How post construction cleaning differs from domestic and commercial cleaning

Domestic cleaning is recurring maintenance in a finished, lived-in home. The soil is household soil, such as grease, soap scum and everyday dust, and the standard is that the place looks tidy again. Post-build dust is different in kind and in volume: it is mineral dust from plaster, cement, timber, MDF and stone, it is abrasive, and it keeps settling out of the air for days after the work stops. A single pass with a domestic kit leaves a fine film on every surface within a day.

Commercial cleaning is a different model again. It is usually a contract for regular rounds in offices, retail, hospitality or industrial premises, staffed and priced around a recurring schedule. A post-build clean is a one-off, intensive job with a defined start, a deadline and a handover standard, and the waste volumes are far higher. Equipment is a fair proxy for the difference: HEPA-filter vacuums, wet-and-dry machines, telescopic dusters, floor scrubbers, glass scrapers and squeegees, dust sheets and barriers, and damp rather than dry methods throughout.

It also helps to know where this sits among other cleaning services, because homeowners often bundle tasks together: a deep clean of an older part of the house, or a regular domestic arrangement running alongside the after-build work. Those are different jobs with different equipment needs, and folding them into one vague request is how quotes end up impossible to compare.

What to look for in post construction cleaning companies

• Experience with after-build dust and debris. Ask how many post-build jobs the company has handled, of what type, whether new build, extension, attic conversion or kitchen refit, and how it deals with fine dust that keeps settling. An answer built on method, sequence and equipment is a better signal than enthusiasm alone. Ask what is brought on the day.
• Public liability insurance. Request the certificate of insurance before work starts and check that the policy is current and covers this kind of work at the property. That cover is the homeowner's protection if a new worktop is scratched, a tap is damaged or a freshly painted wall is marked.
• A clear written scope. The quote should state what is cleaned, what is not, how many visits are involved and what standard counts as finished.
• Waste handling. Ask who removes the waste, whether a skip is included or hired separately, and where anything taken away ends up. Construction-type waste is not household waste and cannot simply be left out for a normal collection, so responsibility for it needs to be agreed in writing rather than decided on the day.
• Safe working around fresh finishes. Ask how newly laid tiles, fresh grout, new paintwork, silicone joints and sealed floors will be cleaned, and whether the company will wait for anything to cure first. A company used to post-build work will raise this before the homeowner does.
• Who will actually be on site. Find out whether the person quoting is the person working, whether it is a crew, and whether the workers are directly employed or subcontracted.
• Reviews and evidence. Read reviews with an eye for after-build work specifically, and ask to see photographs of comparable jobs.
• Environmental claims. If a company sells the job on green or eco-friendly products, ask what backs the claim up. From 27 September 2026, marketing claims about a product's environmental impact must be supported by evidence (CCPC), so a straight answer about which products are used, and why, should be easy to give.

Comparing quotes and why turnaround matters

Ask three companies to quote against the same written scope, so that the differences reflect real differences in work rather than differences in description. A proper quote should list:

• Every room and external area included, and everything excluded.
• The number of visits, and whether both a rough clean and a final clean are included.
• Who removes waste, and whether skips or disposal form part of the job.
• The products, equipment and methods proposed, including how floors will be cleaned.
• Access arrangements, and what water, power and parking the company needs.
• The number of workers and the expected time on site.
• The start date and the date the property will be handed back.
• What insurance is held.
• What happens if dust reappears after the company has left, whether a return visit or a touch-up.
• Any conditions that change the job, such as no running water yet, newly finished floors, or external work that depends on dry weather.

Turnaround matters for practical reasons. Cleaning usually sits between the last tradesperson leaving and the first delivery arriving, and everything afterwards, from snagging to floor finishes, furniture and the movers, queues behind it. Some finishes need to cure before they can be wet-cleaned, and some cleaning needs to happen before a surface is sealed, so one date will rarely cover the whole job. A rough clean with a return visit for the final clean is normal and should be quoted as such. Booking early pays off, because the end of a build is precisely when every homeowner in the area is trying to get a crew on site at the same time.

After-build safety, dust control and making the home usable again

• Control the dust rather than moving it around. Work from the top down, use damp cloths and HEPA-filtered vacuuming instead of dry sweeping, keep doorways sheeted off, and change mop heads or vacuum filters between the dirtiest areas and the finished rooms. Ventilate as the work goes on.
• Wear basic protection. Gloves, eye protection and a dust mask are sensible for anyone working in a freshly finished space, and more so in a house where sanding, plastering or cutting has taken place.
• Respect fresh finishes. New paint, grout, silicone and sealant need time to cure, and water applied too early can spoil them. Abrasive pads, scourers and aggressive descalers should be kept away from new tiles, glass and stone, and the tradesperson should confirm when a surface is ready to be cleaned.
• Keep water away from unfinished electrics. Where sockets, switches or light fittings are still open, cleaning should wait until the electrician has confirmed the circuits are safe. Wiping around exposed wiring is not a risk worth taking for a tidier finish.
• Dry the property out. Once cleaning is done, air rooms properly and let floors dry fully before furniture goes back, so grit is not walked into a newly sealed surface.
• Judge the job by usability. The purpose of post-build cleaning is a property that can be lived in: no dust on the surfaces people touch, no grit underfoot that will scratch a new floor, clean glass and fittings, and no bags or offcuts left behind.

What the law gives a homeowner

Consumers hiring a tradesperson for home improvement work are protected under the Consumer Rights Act 2022, and where something goes wrong the remedies available can include repair, or termination of the contract with a refund (CCPC). In practice that protection works best when there is a written record: the agreed scope, the dates, any changes made in person or by phone, photographs before and after, and payment through a traceable method rather than cash with no receipt. Problems should be raised early and in writing, with the correspondence kept.

Posting the job on ShamFix

Homeowners can describe the property, the stage the build has reached, what has and has not been done, and the date the clean needs to happen, then compare the responses that come back. Posting a job and listing on ShamFix is free and there is no commission, with a subscription planned for the future. ShamFix does not check or certify tradespeople, and profiles are filled in by tradespeople themselves, so homeowners should check registrations themselves and read reviews before agreeing to anything.

FAQ

Does post construction cleaning happen in one visit?

Usually not. Fine building dust settles out of the air for days, and repairs or final snagging work will stir it up again, so most jobs work better as a rough clean followed by a final clean once the site has gone quiet. The quote should say how many visits are included rather than leaving it open.

Should the clean happen before or after snagging?

The rough clean is best done before snagging, so the snagging walk-through can actually see the finishes. The final clean belongs after the snag repairs are finished, because every repair produces new dust on floors, sills and glass that would otherwise have to be cleaned twice.

What should be cleared from the house before the team arrives?

Anything personal or breakable, along with tools, paint tins and leftover materials the homeowner wants to keep. Presses and drawers should be emptied so their insides can be wiped, and children and pets are best kept away from the working areas until floors are dry.

Does the service cover outside the house?

It often can, but it depends entirely on the scope agreed. Paths, patios, driveways, external doors and bin stores are commonly included, while roof-level glazing, boundary walls beyond the site and anything needing access equipment usually fall outside and are quoted separately.

Who is responsible for the leftover building waste?

That is a question for the company before booking, not after. Whoever takes it away should be named in the quote, along with where it is going, and if the homeowner is handling it, the local authority should be asked what it will and will not accept.