Builders Clean Guide: Phase 1, 2 & 3 Explained (Ireland 2026)

What Is a Builders Clean?

A builders clean — also known as a post-construction clean, after-build clean, or construction clean-down — is the professional cleaning of a property after building or renovation work has been completed. Every construction project, from a single-room refurbishment to a 200-unit housing development, generates dust, debris, and residue that must be professionally removed before the property can be occupied or handed over to the client.

Construction dust is not ordinary dust. It contains fine particles of cement, plaster, silica, wood, fibreglass, paint, and adhesive that settle on every surface, penetrate into every crevice, and can remain airborne for days. A domestic vacuum cleaner and a damp cloth will not remove it. Professional builders cleaning requires industrial extraction equipment, specialist cleaning chemicals, and trained operatives who understand the specific challenges of post-construction environments.

Optus Glean provides post-construction cleaning services for residential and commercial projects across Ireland. We work with main contractors, developers, project managers, and private homeowners.

The Three Phases of a Builders Clean

A professional builders clean is completed in three distinct phases. Each phase has a different purpose, different tasks, and different timing in the construction schedule. Understanding these phases is essential for scheduling correctly.

Phase 1: The Rough Clean

Phase 1 happens while the building work is nearing completion. Minor trades may still be on site. The purpose is to remove bulk debris and make the site safe and accessible for final-fix trades (painters, tilers, plumbers, electricians, kitchen fitters).

Phase 1 Tasks

• Remove all construction waste, rubble, and debris from all rooms
• Sweep all floors to remove loose dust, plaster, and mortar
• Scrape windows to remove paint, plaster, and cement splashes
• Remove protective sheeting and coverings from floors and surfaces
• Vacuum accessible surfaces with industrial vacuum (HEPA filter)
• Wipe down window sills, door frames, and architraves
• Remove sticker residue and labels from windows, sanitaryware, and appliances
• Clear external areas of construction waste and packaging

Phase 1 Timing

Schedule Phase 1 when the major structural work, plastering, and first-fix electrical and plumbing are complete. Do not wait until all trades have finished — the purpose of Phase 1 is to clear the way for final-fix trades to work in a clean environment.

Phase 1 Duration and Cost

A 3-bed house typically takes 3–6 hours for Phase 1. Cost: €100–€250 residential, or €1.00–€2.00 per m² commercial.

Phase 2: The Builders Clean (Main Clean)

Phase 2 is the core of the builders clean. It happens after ALL trades have completed their main work but before snagging begins. This is the most intensive phase and takes the longest.

Phase 2 Tasks

• Full dust extraction of all surfaces using industrial vacuum with HEPA filter
• Damp-wipe all horizontal surfaces: window sills, shelves, worktops, ledges
• Clean all internal windows (scrape remaining paint/plaster, wash, polish)
• Clean all door faces, frames, architraves, and handles
• Clean all skirting boards and dado rails
• Clean all light fittings, switches, and sockets
• Scrub and clean all kitchen units (inside and out), worktops, splashbacks, sink, and appliances
• Scrub and clean all sanitaryware: toilets, sinks, baths, showers, taps
• Clean all tiles, grout lines, and splashbacks
• Remove silicone smears, adhesive residue, and grout haze from tiles and glass
• Clean all mirrors and glass surfaces
• Vacuum and mop all floors (hard floors may require scrubbing to remove cement and adhesive)
• Clean radiators inside and out
• Clean built-in wardrobes and storage cupboards inside and out
• Wipe down staircase, banisters, and handrails
• Clean attic hatch and frame
• Damp-wipe all ventilation grilles and extractor fans

Phase 2 Timing

Schedule Phase 2 after all trades have finished their main work. If painters are still touching up, or plumbers are still connecting radiators, wait. Any work done after Phase 2 will create mess that needs cleaning again. The single biggest waste of money in builders cleaning is scheduling Phase 2 too early.

Phase 2 Duration and Cost

A 3-bed house typically takes 6–12 hours (one full day or two half days) for Phase 2. Cost: €150–€300 residential, or €1.50–€3.00 per m² commercial.

Phase 3: The Sparkle Clean (Final Clean)

Phase 3 happens after snagging is complete — after all touch-ups, fixes, and corrections have been done. It is the final detail clean that brings the property to presentation standard for handover to the client or for marketing photography.

Phase 3 Tasks

• Full re-clean of all windows (inside and accessible outside)
• Polish all glass, mirrors, and chrome fittings
• Detail clean all kitchen surfaces and appliances
• Detail clean all sanitaryware and bathroom fittings
• Touch-up clean any areas disturbed during snagging
• Final vacuum of all carpets and rugs
• Final mop and polish of all hard floors
• Wipe all light switches, sockets, and door handles
• Remove any remaining sticker residue or protective film
• Final inspection walk-through with site manager or client

Phase 3 Timing

Schedule Phase 3 as close to handover as possible. Ideally the day before or the morning of handover. No other trades should enter the property after Phase 3.

Phase 3 Duration and Cost

A 3-bed house typically takes 3–6 hours for Phase 3. Cost: €100–€250 residential, or €1.00–€2.50 per m² commercial.

Pricing Summary by Property Type

Prices are exclusive of VAT (23%). Actual pricing depends on the level of construction debris, the quality of surface protection during the build, and any specialist requirements (such as high-level cleaning in double-height spaces or external window cleaning requiring access equipment). For a full comparison with other cleaning service types, see our cleaning prices guide.

Health and Safety Considerations

Post-construction cleaning is one of the higher-risk cleaning activities due to the nature of the dust and the site conditions. These are the key health and safety considerations:

Silica Dust

Crystalline silica is present in concrete, mortar, sandstone, granite, brick dust, and some plasters. When inhaled, fine silica particles can cause silicosis — a progressive, irreversible lung disease. The Health and Safety Authority (HSA) classifies respirable crystalline silica as a carcinogen.

Professional builders cleaning mitigates silica risk through:

• Industrial vacuums with HEPA H13/H14 filters that capture fine particles
• Wet cleaning methods (damp wiping, wet mopping) to suppress airborne dust
• RPE (FFP3 masks) for all operatives during dust-generating tasks
• Adequate ventilation during cleaning (open windows, mechanical ventilation)
• Never dry sweeping (which redistributes fine dust into the air)

Other Hazards

• Chemical exposure: Builders clean chemicals (acid-based tile cleaners, solvent-based adhesive removers) require COSHH training and appropriate PPE.
• Slip and trip hazards: Construction sites have uneven floors, cables, wet surfaces, and loose materials. Safe Pass training is essential.
• Working at height: Cleaning windows, high-level surfaces, and stairwells may require step ladders, scaffolding, or access platforms. Only trained operatives should work at height.
• Sharp objects: Nails, screws, glass shards, metal offcuts, and blade fragments are common on construction sites. Cut-resistant gloves and robust footwear are essential.
• Electrical hazards: Temporary site electrics, exposed wiring, and water near electrical installations require awareness and caution.

All Optus Glean post-construction cleaning operatives hold Safe Pass certification, receive COSHH training, and are equipped with appropriate PPE. Our teams carry €6.5M public liability insurance and €13M employer's liability insurance as standard.

Scheduling the Builders Clean: A Guide for Project Managers

Correct scheduling of the builders clean is critical. Get it wrong and you either pay for re-cleaning or delay handover. Here is the recommended timeline:

1. Week -4 to -3 (before handover): Book the builders clean team. Provide floor plans and approximate m². Agree access arrangements and site induction requirements.
2. Week -3 to -2: Phase 1 (rough clean) when major works complete and final-fix trades are mobilising.
3. Week -2 to -1: All final-fix trades complete their work. Snagging list prepared by site manager.
4. Week -1: Phase 2 (main builders clean) after all trades have finished main work.
5. Week -1 to handover: Snagging works completed by trades.
6. Day -1 or morning of handover: Phase 3 (sparkle clean) after all snagging complete.
7. Handover day: Property presented to client in show-home condition.

For multi-unit developments, we work plot-by-plot in coordination with the site manager, ensuring each unit is cleaned in the correct sequence relative to the trades programme.

New Build vs Renovation: Different Challenges

New Builds

New builds are generally more straightforward to clean because all surfaces are new and there is no existing furnishing or decoration to protect. The main challenges are volume of construction dust (especially plaster dust), cement and mortar residue on floors, grout haze on new tiles, sticker residue on windows and sanitaryware, and paint splashes on glass and fittings.

Renovations

Renovations are more complex because:

• Dust migration: Construction dust travels through the entire property, not just the renovated area. Existing rooms, furniture, and belongings may be contaminated.
• Surface protection: Existing floors, worktops, and fixtures may have been damaged or stained during the renovation.
• Mixed surface ages: New tiles next to old grout, new paint next to old woodwork — different surfaces require different cleaning approaches.
• Occupied properties: If the client was living in the property during the renovation, personal belongings, furniture, and soft furnishings may need cleaning.

Renovation builders cleans typically cost 20–30% more than equivalent new-build cleans because of the additional complexity and care required.

What to Expect from a Professional Builders Clean

When you hire Optus Glean for a post-construction clean, here is what you can expect:

• Site visit and assessment before work begins (for projects over €500)
• Written quotation with itemised scope of work for each phase
• Safe Pass certified operatives with full PPE
• Industrial vacuum extraction equipment (HEPA filtered)
• Specialist construction cleaning chemicals (acid-free tile cleaners, solvent-free adhesive removers where possible)
• Protection of finished surfaces during cleaning (we do not use abrasive methods on polished surfaces)
• Walk-through inspection with site manager after each phase
• Snagging-related re-clean included (one return visit after snagging for Phase 3)