Additions & Alterations Works (A&A Works) Services in Singapore
Transform your property with expert Additions & Alterations (A&A) Works in Singapore. SinHao is a A&A contractor that offers top-quality A&A works services for residential and commercial projects. Contact us for a personalized quote!
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Our Customers
We Are Trusted By
At Sin Hao E&C Pte Ltd, we are proud to serve a wide range of clients across Singapore’s residential, commercial, and industrial sectors. As a leading A&A works contractor in Singapore, our success is built on long-term relationships with customers who trust us for reliability, workmanship, and responsive service.
Additions & Alterations Works (A&A Works)
What is Additions & Alterations (A&A) Works?
- Additions: Adding new components to a structure, such as extra rooms, floors, or extensions, thereby increasing the usable space.
- Alterations: Changing the layout, design, or functionality of existing spaces, which might involve demolishing walls, reconfiguring rooms, updating interiors, or modernizing systems like plumbing and electrical.
A&A vs. Reconstruction
In Singapore, work is classified as A&A when the construction work does not exceed 50% of the building or property’s existing Gross Floor Area (GFA). Exceeding this 50% threshold triggers far more complex regulatory requirements associated with full reconstruction. Our team designs projects strategically to maximize your usable space while remaining fully compliant within the A&A regulatory envelope.
Our Additions & Alterations Works (A&A Works) Services
Structural & Building Work
Our experienced professionals excel in a wide range of structural and building services, including:
- Reinforced Concrete (R.C) work for sturdy foundations and structures
- Stainless Steel fabrication for modern, durable installations
- Aluminium Work for lightweight, corrosion-resistant solutions
- Custom Metal Work to meet your specific design needs
Swimming Pool Construction & Repairs
Create your personal oasis with our comprehensive swimming pool services:
- New pool design and construction
- Pool renovation and repair work
- Railing Glass installation for safety and aesthetic appeal
- Expert Waterproofing solutions
Leakage and Seepage Rectification to protect your investment
Sunroom Installation
Bring the outdoors in with our custom sunroom installations. Enjoy natural light and scenic views year-round, adding value and comfort to your home.
Repairs & Redecoration
- Structural repairs to maintain your home’s integrity
- Interior and exterior repainting to refresh your property’s look
- Custom redecoration solutions tailored to your style
Floor Finishes
- General Tiling for versatile, durable surfaces
- Marble & Granite installation for luxurious, long-lasting floors
- Vinyl Flooring solutions combining style and practicality
- Pebble wash finishes for unique, textured surfaces
- Timber Decking to enhance outdoor living areas
Residential Additions
- Room Additions: Create extra space by adding new rooms or expanding existing ones, including bedrooms, bathrooms, or family areas.
- Second Storey Additions: Elevate your home with additional living space on a new level, perfect for growing families.
- Home Extensions: Extend your home’s footprint for larger living areas, kitchens, or utility spaces.
- Balcony/Patio Additions: Enhance your outdoor living experience with custom-designed balconies or patios.
- Internal Reconfiguration: Redesign the interior layout to improve space utilization and flow.
Commercial Alterations
- Office Space Alterations: Redesign office layouts for better workflow, privacy, or to accommodate business growth.
- Retail Remodeling: Refresh store fronts, interiors, or shop layouts to attract more customers and improve shopping experiences.
- Restoration and Upgrades: Revitalize old buildings or commercial spaces with modern amenities and aesthetic upgrades.
- Restaurant & Café Makeovers: Transform dining spaces to match new culinary concepts or brand identities.
- Facility Expansion: Increase the capacity of your business premises through strategic extensions.
Structural Modifications
- Structural Upgrades: Strengthen existing structures to support additional loads or for safety compliance.
- Roof Alterations: Modify or replace roofs to accommodate new additions or to improve energy efficiency.
- Foundation Work: Undertake necessary foundation work to support new construction or major alterations.
Interior Upgrades
- Partitions: Create flexible, functional spaces with custom-designed partitions.
- Custom Cabinetry & Fixtures: Tailor-made carpentry work to fit your space and storage needs.
- Window & Door Replacements: Improve energy efficiency, security, or aesthetics with new installations.
- Electrical & Plumbing Alterations: Modernize or expand systems to meet current standards or future needs.
Each service is executed with meticulous attention to detail, ensuring that your project not only meets but exceeds your expectations. Whether it’s a small alteration or a significant addition, SinHao is the A&A contractor that turns your vision into reality.
Why Choose Sinhao
for Additions & Alterations Works (A&A Works) Services?
The 5-Step Compliance Framework for Major A&A Projects
All major A&A projects involving structural changes must be managed through a Qualified Person (QP), a registered architect or a professional structural engineer (PE). Our commitment to compliance ensures your project is approved efficiently by Singapore’s regulatory bodies.
1. Initial Assessment and Structural Certification (PE Mandate) The appointed Professional Engineer (PE) must inspect the existing building and certify that the structure can fully resist the additional load introduced by the proposed works. This foundational step guarantees the long-term integrity and safety of the alteration.
2. URA Planning Permission (Written Permission – WP) We handle the mandatory submission to the Urban Redevelopment Authority (URA) to obtain Written Permission (WP) or a lodgment receipt, ensuring the proposed works comply with all zoning, setback, and GFA requirements.
3. BCA Structural Plan Approval This is where technical compliance is verified. We meticulously prepare and submit:
Application for approval of structural plans – Form BCA-BE-STAPPV01.
One set of detailed structural plans and structural design calculations, both certified by the PE.
For eligible non-complex landed house A&A, we utilize the BCA’s streamlined process using Form BPD_BP03.
4. Specialist Clearance Management (FSSD & Parallel Approvals) For commercial, industrial, or complex works, Fire Safety and Shelter Department (FSSD) clearance is mandatory. We manage parallel submissions to all Technical Departments (TDs), leveraging the BCA protocol that allows applications to proceed even if certain clearances are outstanding, enabling an Accelerated Start-Work Timeline.
5. Certification of Completion We manage the submission of final “as-built” plans and documentation required before the application for the Temporary Occupation Permit (TOP) or the final Certificate of Statutory Completion (CSC).
Our Additions & Alterations Works (A&A Works) Process
At Sinhao, we offer a wide array of services designed to meet all your home renovation and construction needs. Our skilled team is committed to delivering quality workmanship and reliable results across every project.
Pricing for Additions & Alterations Works (A&A Works) in Singapore
A&A Cost Drivers and Budget Clarity
The cost of a major A&A project can range from below $100,000 to well over $3,000,000 , making precise early estimation impossible without a full scope. Costs are driven by three primary variables:
Scope and Structural Complexity: Structural additions (new floor slabs, modifying load-bearing elements) require specialized Professional Engineer consultation and expensive materials, costing significantly more than non-structural internal modifications.
Mandatory Regulatory Fees: Project costs include non-negotiable fees, such as the BCA building plan submission fee, calculated at $200 for every 100m² of new or extended area , in addition to fees for the Qualified Person (QP) and PE certification.
Duration and Logistics: Longer project timelines, the requirement for site-specific hoarding, and managing logistics on operational commercial sites or occupied landed homes all contribute to the final budget.
General Cost Ranges
- Minor Alterations: For simple tasks like adding partitions or minor renovations, costs can start from around $500 to $2,000 per alteration, excluding design fees and permits.
- Medium-Scale Projects: Adding a room or making significant internal changes might range from $2,000 to $10,000, depending on the specifics like size, materials, and finishes.
- Major Additions: Extending a home, adding a second storey, or complex structural changes can cost between $10,000 and $50,000+. This includes:
- New Floor Additions: Approximately $1,500 to $3,000 per square meter.
- Extensions: Around $1,200 to $2,500 per square meter for basic constructions.
Engineering Vertical Space: Sin Hao’s Mezzanine and Loft Specialization
Adding a mezzanine floor or loft structure is one of the most effective methods to double the floor area covered by the structure’s footprint, significantly enhancing usable Gross Floor Area (GFA) for commercial or residential properties. This high-value A&A work is structurally intensive and requires specific Professional Engineer (PE) endorsement and rigorous compliance.
If the proposed mezzanine or loft area exceeds 5 square meters (5m²), it is mandatory for us to submit comprehensive construction drawings to the Building and Construction Authority (BCA), accompanied by precise structural calculations certified by a Professional Engineer (PE). This process is crucial to ensure the new structure will not compromise the integrity of the existing building and poses no safety hazard.
Critical Structural Feasibility Checks We Manage:
Load-Bearing Assessment: We first determine if existing walls are suitable to bear the additional load. If not, we design and construct supplementary supporting columns.
Span Limitations: The span of the loft should ideally not exceed 4 meters. For rooms wider than this, we integrate additional supporting columns or thicker beams to maintain structural stability.
Headroom Optimization: Usable height is paramount. We aim to ensure approximately 2 meters of usable space both above and below the loft, factoring in the thickness of the loft platform itself.
Access Design: We advise clients on the appropriate access solution, whether it requires a space-saving ladder for small lofts or a full, chunkier staircase for larger, higher-use areas, which often involves metal works and custom finishing.
Comprehensive Compliance Scope: Beyond BCA and URA (Multi-Agency Assurance)
While BCA and URA are the primary bodies, a truly authoritative contractor must demonstrate command over all technical departments (TDs), specifically addressing Fire Safety and Housing Board compliance.
Navigating the Multi-Agency Approval Landscape
For a project to successfully move from plan to reality, clearance is required from a spectrum of regulatory bodies. Sin Hao coordinates the entire multi-agency process, anticipating and addressing requirements before they cause project delays.
1. Fire Safety and Shelter Department (FSSD) Clearance:
Any A&A work within commercial, industrial, or complex landed properties that impacts the building’s layout, fire protection systems, or designated use requires mandatory clearance from the FSSD. Our submission process includes:
Ensuring all changes meet strict fire safety standards and egress requirements.
Coordination with registered inspectors (RIs) to obtain the necessary Fire Safety Certificates (FSC) before the final Temporary Occupation Permit (TOP) can be granted.
2. Commercial & Industrial Considerations:
Beyond FSSD, commercial A&A must account for specific requirements concerning Mechanical & Electrical (M&E) systems, utility upgrades (PUB), and specialized industrial uses. We ensure all plans align with the specific operational constraints of F&B, retail, or manufacturing environments.
3. Managing HDB and Town Council Guidelines (If Applicable):
While our primary expertise lies in structural works for landed and commercial properties, we maintain strict adherence to all Housing & Development Board (HDB) guidelines for any works within public housing units. If your A&A project involves an HDB property, our team handles the submission of the online Renovation Permit application, ensuring compliance with all standard HDB specifications for upgrading works. This prevents conflict with Town Council regulations and ensures site management compliance.
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Ready to experience the best in A&A contractor services? Contact us today for a free quote. Let us show you how we can transform your space with our expert A&A works services.
Our Commitment to Quality
At Sinhao E&C, we adhere to the Building Control Act (BCA) standards in Singapore, ensuring all our work is up to code and regulation. Our team undergoes continuous training to stay updated with the latest in home renovation and construction technologies and practices.
A&A Works Service Areas Across Singapore
We serve all major districts and towns including:
- Central: Orchard, Newton, River Valley, CBD
- East: Bedok, Tampines, Pasir Ris
- North: Yishun, Sembawang, Woodlands
- West: Bukit Batok, Jurong, Clementi
- North-East: Serangoon, Hougang, Punggol
Our A&A Works Compliance & Licensing
✔️ BCA Registered Builder (GB2)
✔️ SCDF Submission Experience for Fire Safety Works
✔️ Working with Qualified Persons (QPs) & PEs
✔️ MOM-compliant Workplace Safety Practices
We ensure full regulatory compliance from day one to completion.
Projects
Our Previous A&A Works Projects
At Sinhao, we take pride in the quality and diversity of the projects we’ve completed. Our portfolio showcases our expertise across various aluminium, steel, roofing, renovation and construction services, reflecting our commitment to excellence and customer satisfaction.
Testimonials
What Our Client Says
At Sinhao, customer satisfaction is at the heart of everything we do. Here’s what some of our clients have to say about their experiences with us:
Appointment
Request a FREE Consultation
Ready to experience the best in A&A contractor services? Contact us today for a free quote. Let us show you how we can transform your space with our expert A&A works services.
Frequently Asked Questions on
Additions & Alterations Works (A&A Works)
What is Additions & Alterations Works (A&A Works) in Singapore?
A&A refers to the modification, expansion, or upgrading of existing buildings without constructing a new one. It includes adding new rooms, floors, or altering interior layouts to enhance functionality or aesthetics.
Do I need approval for A&A works in Singapore?
Yes, depending on the scale of the project, you’ll need approval from the Building and Construction Authority (BCA). Minor alterations might not need permits, but it’s crucial to check with BCA or your contractor to ensure compliance.
How much does A&A work cost in Singapore?
- Minor Alterations: $500 – $2,000 per alteration
- Medium Projects: $2,000 – $10,000
- Major Additions: $10,000 – $50,000+, with costs per square meter ranging from $1,200 for basic to $3,000 for premium work. Always consult with professionals for a precise quote.
How long does an A&A project take?
- Minor Alterations: Weeks
- Major Additions: Several months. Planning, design, and obtaining permits can add to the timeline.
Can A&A increase the value of my property in Singapore?
Yes, well-executed A&A can significantly increase property value by enhancing space utilization, modernizing the look, or adding features like additional bedrooms or bathrooms.
What are common A&A projects in Singapore?
- Adding extra floors or rooms
- Internal reconfiguration of space
- Converting attics or basements
- Upgrading kitchens and bathrooms
- Enhancing facade or adding outdoor living areas
How do I choose the right contractor for A&A works in Singapore?
- BCA registration and relevant certifications
- Experience with similar projects
- Client testimonials or project portfolios
- Clear communication, transparent pricing, and adherence to timelines
What is involved in the A&A process?
- Consultation to understand your needs
- Design and planning phase
- Obtaining necessary permits
- Construction phase with regular quality checks
- Final inspection and handover
Are there any eco-friendly options for A&A works?
- Sustainable materials like recycled wood or green concrete
- Energy-efficient windows and doors
- Low-VOC paints and finishes
- Designs that maximize natural light and ventilation
What should I consider before starting an A&A project?
- Your budget and how much you’re willing to invest
- The impact on your daily life during construction
- Future needs to ensure your A&A project remains relevant
- Legal and structural constraints of your property
How can I ensure my A&A project complies with Singapore's regulations?
Work with a contractor familiar with local laws, or hire a consultant to oversee compliance. Regular inspections during construction and obtaining the necessary permits are key steps.
What are the benefits of A&A over buying a new property?
- Customization to your exact needs
- Cost-effectiveness compared to buying and renovating a new property
- Emotional attachment to your current home or business location
- Potential tax benefits or grants for certain types of A&A
Can I stay in my house during A&A renovation?
Whether you can remain in your home depends entirely on the scope of the works. For substantial structural projects involving the roof, extensive internal modifications, or new slabs, temporary relocation or alternative living arrangements may be required due to noise and disruption.
When must I appoint a Professional Engineer (PE)?
A Professional Engineer (PE) must be appointed for all A&A works involving structural elements, such as adding new floor slabs or modifying load-bearing columns. The PE certifies the structural integrity of the altered building.
What is the difference between A&A and Reconstruction?
A&A involves works that modify or extend an existing building, provided the scope does not exceed 50% of the building’s Gross Floor Area (GFA). Exceeding 50% is generally classified as reconstruction.
What authorities are involved in A&A submission?
The primary authorities are the Building and Construction Authority (BCA) for structural safety and the Urban Redevelopment Authority (URA) for planning permission. The Fire Safety and Shelter Department (FSSD) clearance is also critical for commercial projects.
