Landed Home Mould Removal Cost Singapore

Pricing Breakdown

Included on every job: furniture & flooring protection (sheets / masking) plus post-service recovery (surface wipe-down, debris removal).

Scope	From	Notes
Spot patch (≤0.5 m²)	From S$199	Single targeted patch + anti-mould paint + protective sealer; 90-day warranty
Essential — first full ceiling or wall surface	From S$299	Antimicrobial + Nippon anti-mould paint + sealer; 6-month warranty
Essential — each additional full surface	+$100	Same room scope
Signature — first full surface	From S$400	Premium anti-mould paint + waterproofing paint on toilet ceilings; 24-month warranty
Signature — each additional full surface	+$150	Zinsser / Gush / Breathe systems
Wardrobe / cabinet mould + prevention	From S$120	Per trip; walk-ins, built-ins, store rooms
Silicone change + mould prevention	From S$120	Per trip; bathroom/kitchen joints
Exterior wall (rain-driven mould)	From S$500	Per elevation, includes mould vs algae diagnosis
Attic / loft cavity	From S$600	Tile underside + insulation inspection; PPE-intensive
Basement / lower ground	From S$800	Includes RH baseline log + dehumidifier strategy
Heritage shophouse (lime substrate)	From S$1,200	Lime-compatible protocol; URA-aware reinstatement
Whole-property GCB audit	From S$2,500	Quoted post-walkthrough; m² + substrate complexity

Weak Areas We See Most

Basement walls (below DPC line)

Singapore's water table is shallow. Below-grade walls draw moisture by capillary action. Mould appears as a horizontal band 30–80 cm above the floor — the 'rising-damp signature'. Painting over makes it worse by trapping moisture.

Attic timber rafters & roof underlay

Tile roofs sweat at night. Without adequate eave ventilation, condensate forms on rafters and underlay. Often invisible until you smell it from a bedroom below or see staining on the ceiling cornice.

Party wall facing neighbour's exterior

On terraces & semi-Ds, your interior wall is the back of the neighbour's exterior wall. If their face is unsealed, your interior takes the moisture. Tricky because the cause is technically not on your property.

Bay window / cantilever soffit

These features have minimal eave protection. The underside of any cantilever is a chronic mould zone in Singapore — gravity holds condensate against the soffit until it grows.

Garage / car-porch ceiling under master bedroom

Master bath above + uninsulated concrete soffit below = condensation in dry weather, leak in wet. Owners always assume leak; usually it's both.

Heritage shophouse internal lime walls

Lime walls breathe — they need to. Cement render or modern emulsion paint traps vapour, mould blooms behind the paint. Removing wallpaper from a 1930s shophouse often reveals 90 years of layered mould.

Detection Difficulties

Horizontal damp band 30–80 cm above floor on ground level = capillary rise, not surface mould
Bedroom ceiling stains directly under attic = roof condensation, not always a leak
White efflorescence + mould together = active water ingress, not historical
Strong musty smell at the foot of stairs to basement = sub-floor moisture, even if walls look dry
Black streaks running vertically on exterior render = algae (cheaper, $300–$400 wash) — not mould; we'll tell you which during photo triage
Mould only on one elevation = wind-driven rain orientation; usually NW (monsoon) or SE (sumatra squalls)

Removal Challenges

Basement remediation requires moisture-source resolution before paint — otherwise the warranty is void from day 1
Attic work needs hot-weather morning slots (rafter temps reach 50°C+ by midday — unsafe and bad for paint cure)
Heritage shophouses use lime wash + breathable mineral paint, not modern emulsion — different supplier, different cure time
Exterior elevations require scaffold or boom-lift on most landed properties (single-storey extensions sometimes ladder-accessible)
Party-wall jobs need neighbour notification and sometimes coordinated treatment to avoid wave-after-wave recurrence
Garden/landscape proximity matters: dense planting = persistent micro-climate. Solution often includes pruning recommendation, not just paint

What Drives the Cost

Property size: GCB (≈800 m² floor area) vs intermediate terrace (≈250 m²) — 3× audit time
Substrate mix: pure cementitious vs lime+timber+brick — multi-material jobs need parallel protocols
Heritage classification: URA-conserved properties have reinstatement constraints (+15–25%)
Garden/landscape intensity: dense vegetation against walls drives recurrence and influences paint tier choice
Access height: anything above single-storey gable adds platform/scaffold cost
Number of bathrooms: each one is its own ecosystem

Why landed jobs swing widest in price

A bathroom is a bathroom — HDB, condo, or landed, the bathroom price is similar. What makes landed prices range from $199 to $25,000+ is everything around the rooms: external envelope, basement, attic, garden interface, heritage status, and the sheer surface-area math.

We split landed jobs into Phase 1 (urgent biological) and Phase 2 (envelope stabilisation). Phase 1 keeps your family safe at HDB-equivalent prices; Phase 2 is where landed-specific costs concentrate and can be planned over months.

Heritage shophouse — a different protocol

If your property is in Chinatown, Tanjong Pagar, Joo Chiat, Geylang, Tiong Bahru or Little India and pre-1960, it's likely a lime-mortar / lime-render structure. Modern anti-mould paint will accelerate decay by trapping vapour inside the wall.

Our heritage protocol uses breathable mineral silicate paints, lime washes, and where possible removes incompatible past coatings. Cure times are longer (7–14 days vs 24–48 hrs), so plan accordingly.

Frequently Asked Questions

Is the $199 spot rate really available for my property type?

Yes. $199 covers a single targeted patch (typically up to ~0.5 m²) — applied identically whether you're in a 3-room HDB, a penthouse, a landed home, or an office. The figure changes only when scope grows: more area, more substrates, more access constraints, or a higher protection tier.

Should I worry about my basement?

Yes, even if it 'looks dry'. Singapore basements run 75–90% RH year-round without active dehumidification. Mould you can see is the late stage; we measure baseline RH, surface moisture and sub-floor moisture before quoting. Most basements need a dehumidifier strategy as much as a paint job.

Is my exterior wall stain mould or algae?

Black vertical streaks below window sills and gutters are usually algae (Gloeocapsa) — needs a $300–$500 biocide wash, not full mould protocol. Patchy, three-dimensional growth in sheltered corners is mould. Send a photo on WhatsApp and we'll triage free.

Do you handle Black & White houses?

Yes. SLA-leased Black & White properties have specific reinstatement standards — we work within them and coordinate with SLA's appointed managing agent where required.

Why is my exterior wall mouldy on only one side of the house?

Wind-driven rain orientation. In Singapore, NW elevations cop the NE monsoon (Dec–Mar) and SE elevations cop the SW monsoon and sumatra squalls (Jun–Sep). Solution combines biocide + a paint system rated for that exposure (Signature tier strongly recommended).

Why a WhatsApp photo quote instead of a paid inspection?

For 80% of cases, three photos (close-up, mid, room context) plus the affected area in m² is enough to scope honestly. We only quote a paid inspection when the cause is structurally hidden — inter-flat condensation, suspected concealed leak, or HVAC-borne contamination — and we tell you upfront before charging.

Is there a warranty?

Yes. Spot patch ($199) carries a 90-day no-recurrence warranty on the patched area; Essential tier carries a 6-month warranty on the treated surface; Signature tier (with engineered anti-mould paint) carries a 24-month warranty when applied to a properly prepared substrate. Warranty excludes seepage, structural defects, diagnostic scans and new water ingress events. See full terms at /warranty.