Service 02
A&A Contractor Singapore.
Additions and Alterations works for Singapore landed homes, condos, and commercial spaces — rear extensions, upper-floor additions, structural reconfiguration, full-property upgrades. We work around live occupants when needed and keep daily life running through the works.
A&A Scope
What an A&A actually involves.
Most A&A briefs we receive in Singapore fall into one of these categories. Tell us yours at the site visit and we’ll scope the work accordingly — with realistic logistics if you plan to stay in residence.
- ▸ Rear extensions (single or double storey)
- ▸ Upper-floor additions and roof terrace conversions
- ▸ Attic conversions to habitable space
- ▸ Full or partial demolition and rebuild
- ▸ Structural wall removal & beam introduction
- ▸ Pool deck and landscape rebuilds
- ▸ Full re-roof and waterproofing replacement
- ▸ Bathroom and kitchen relocations
- ▸ Window-wall and facade reconfiguration
- ▸ Heritage element retention with new internals
- ▸ Outdoor sheltered structures (porte-cocheres, pergolas)
- ▸ Boundary wall and gate replacement
A&A Process
Five stages. One named site supervisor.
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01
Site Assessment & Feasibility
Free site visit. We assess existing structure, roof condition, plumbing risers, and accessible plant route. You receive a feasibility note within 5 working days — including red-flag items that often blow A&A budgets.
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02
BCA / URA / Town Council Submissions
We coordinate with your QP architect on URA Planning Approval and BCA Building Plan. For condo A&A, we manage MCST notification and conditions. We carry submission timeline risk so you don’t.
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03
Demolition & Structural Works
Hoarding, dust protection, soft strip, then structural demolition. New beams, columns, and slabs cast to engineer’s drawings. Waterproofing pre-tested before next trade comes in.
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04
Re-Build & Trade Coordination
M&E roughing-in, wet trades, dry trades sequenced to avoid rework. If you’re in residence, daily clean-down and partition seal-up at end of works each day.
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05
12-Month Defects Liability Period
Snagging walk before TOP, defects rectified on the spot. After TOP, a 12-month defects liability period covers any latent workmanship issues. Critical defects (water ingress, electrical) get 24-hour response.
Why Lee & Co for A&A
We’ve done these before.
Live-Occupant Logistics
When you stay in residence during works, we partition daily, schedule loud trades around your hours, and keep one bathroom and kitchen functional throughout. Site is cleaned down end-of-day, every day.
Hidden-Condition Honesty
A&A means opening up existing structure and finding things drawings didn’t show. We hold realistic client contingency (10–15%), and unspent contingency comes back to you at TOP. Surprises priced from the same supplier rates.
URA & MCST Coordination
For condo A&A, MCST conditions can stop a job dead. We pre-clear conditions before works start, manage notification windows, and protect common-area access throughout.
Frequently Asked Questions
Questions we hear most often.
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What is A&A and how is it different from renovation?
A&A (Additions & Alterations) involves changes to the structure or layout of a property — extending floor area, adding storeys, removing walls, reconfiguring layouts, replacing the roof structure. Renovation typically refers to non-structural works like painting, joinery, and finish replacement. A&A requires URA Planning Approval and BCA Building Plan submissions; renovation usually does not. -
How long does a landed-house A&A typically take?
A typical landed A&A in Singapore (rear extension, attic conversion, partial demolition + rebuild) runs 5–9 months on site. Add 2–4 months for URA / BCA submissions before site work starts. The full timeline from concept to TOP is usually 9–14 months. Larger interventions (full second-storey addition, full reroof) can push 12–18 months on site. -
Can I stay in the house during the A&A works?
Often yes — we partition the live block from the works zone, schedule loud trades around your routine, and dust-protect the partition daily. Plumbing and electrical isolation is staged so you keep one functional kitchen and bathroom throughout. Tell us your living arrangements at site visit and we’ll quote the logistics realistically. -
Do I need URA approval for an A&A?
Yes — any change to the building footprint, gross floor area (GFA), height, or external appearance triggers URA Planning Approval. Internal-only reconfigurations may still need BCA Building Plan approval if they affect structural elements. Your QP (architect) prepares the URA submission; we coordinate with them to keep the schedule on track. -
How are A&A variations priced?
Under our open-book contract, variations are priced using the same supplier rates as the original contract — no inflated “variation premium”. We hold a 10–15% client contingency on A&A jobs because hidden conditions surface once we open up an existing structure. Unspent contingency comes back to you at TOP. -
What is the Defects Liability Period?
Standard 12 months from TOP. During this period we rectify any latent defects in workmanship at no additional cost — cracks in plaster, paint chips, sticky doors, plumbing leaks. Critical issues (water ingress, electrical faults) get a 24-hour response. We carry insurance throughout.