HDB Licensed
BCA Class 1
BizSafe
ISO
BCA Class 1 licensed. Every structural modification endorsed by a Professional Engineer (PE). Full BCA & URA submission management — from Envelope Control compliance to TOP certification.
Addition & Alteration (A&A) works for landed homes typically range from $50,000–$500,000+ depending on scope. Single-storey rear extensions run $80,000–$200,000, additional storeys $150,000–$400,000, and full Good Class Bungalow (GCB) structural overhauls can exceed $500,000. Every project requires structural endorsement by a Professional Engineer (PE), including subfloor structural analysis and load calculations.
As a BCA Class 1 registered contractor, Proptality manages the entire regulatory workflow — BCA building plan submissions, URA planning permission for envelope changes, and Envelope Control compliance for GCBs in Nassim, Tanglin, Holland and Bukit Timah. We serve landed properties across Serangoon, Marine Parade, Sentosa Cove and island-wide. Free site inspection before any quotation.
Contractor insight: In our experience, most landed homeowners underestimate the BCA approval timeline — plan for 6–8 weeks just for building plan approval, plus 4–8 weeks more if URA planning permission is needed. The most common reason for A&A cost overruns is unexpected subfloor conditions in pre-1990 properties, which is why we always recommend a PE structural assessment before committing to a budget.
Maximise your plot ratio with PE-endorsed rear extensions, side additions and additional storeys — all structurally certified and BCA-approved.
Don't navigate regulatory submissions alone. We manage building plan approvals, URA planning permission and Envelope Control compliance for GCBs end-to-end.
Every load-bearing modification — wall removal, column work, mezzanine floors — is backed by Professional Engineer (PE) certification with full subfloor structural analysis.
Every landed property A&A project follows a regulated approval pathway. As a BCA Class 1 contractor, Proptality manages this entire process.
Professional Engineer conducts on-site inspection, subfloor structural analysis and load-bearing assessment. Identifies structural constraints and feasibility.
Duration: 1–2 weeksDetailed architectural plans, structural engineering calculations and PE endorsement prepared. For GCBs, Envelope Control compliance is verified at this stage.
Duration: 2–4 weeksFormal submission to BCA for building plan approval. Includes structural plans, PE certifications and compliance documentation. BCA reviews and grants approval.
Duration: 6–8 weeksRequired when works affect the building envelope, plot ratio or land use. GCBs in designated areas (Nassim, Tanglin, Holland, Bukit Timah) require Envelope Control clearance from URA.
Duration: 4–8 weeksConstruction begins upon approval. BCA conducts periodic inspections at key milestones. Proptality coordinates all inspections and ensures compliance throughout.
Duration: 8–36 weeks (varies by scope)Upon completion, Temporary Occupation Permit (TOP) or Certificate of Statutory Completion (CSC) is applied for. Final PE certification, as-built drawings and compliance records handed over.
Completion milestone
General Builder Class 1 — licensed for high-value structural projects including GCB renovations, additional storeys and large-scale landed extensions.
Deep experience with Envelope Control compliance, plot ratio optimisation and structural modifications across Nassim, Tanglin, Holland and Bukit Timah GCB zones.
All structural works endorsed by accredited Professional Engineers. Subfloor structural analysis, load calculations and engineering certification for every project.
End-to-end BCA submission, URA planning permission, Envelope Control clearance and TOP/CSC application — no regulatory gaps.
ISO 9001 quality management and BizSafe Level 3 workplace safety. All projects comply with MOM and NEA standards.
Detailed quotations after mandatory site inspection. No hidden costs. Clear scope, PE fees, permit costs and construction timeline agreed upfront.
Tell us the best rate you've received from another contractor — and let us check if we can offer a better deal. We provide a free on-site assessment with a detailed, transparent quotation. No obligation. No hidden costs.
Send Us Your Quote for Review →Don't wait until the last minute. Start planning your dream home with us today — so we're ready to begin work the moment you receive your keys. Early consultation helps you lock in the best pricing, finalise designs, and avoid the rush.
Book Free Consultation →We do not issue quotations over the phone, via email, or based on drawings and floor plans. A physical site inspection is mandatory before any quotation can be prepared. This is non-negotiable and ensures accuracy for all parties involved. If you are unable to facilitate a site visit, kindly refrain from contacting us.