Renovation for beginners in Singapore: a step-by-step guide

If this is your first renovation, the process can feel like a maze of unfamiliar terms, quotes and approvals. It is easier once you see it as eight steps in a fixed order. This guide walks through them in plain English and points to our free tools for each one: the cost calculator, the renovation checklist and the glossary of renovation terms.

Figures and rules here are general guidance. HDB, your condo's management office and the firms you hire set the details, so confirm them before you commit.

The eight steps at a glance

1. Decide the scope. A light refresh or a full overhaul?
2. Set a budget with a buffer.
3. Choose who to hire: an interior design firm, a contractor, or a package.
4. Collect and compare quotations on the same brief.
5. Check credentials and sign a written contract.
6. Get the permits and approvals your home needs.
7. Follow the works in the right order and visit the site.
8. Inspect at handover and use the warranty for defects.

Most of the money and most of the mistakes sit in steps 2 to 5, so spend your time there.

Step 1: Decide what kind of renovation you need

Start with the state of the home, not the style. A new BTO flat usually needs finishing and carpentry rather than demolition. A resale flat often needs old floors, bathrooms or wiring replaced, which costs more and takes longer. A condo may arrive with finishes already installed. Write down what must change, what would be nice, and what can wait. That list is the brief you will give every firm. Our guides to HDB renovation cost and condo renovation show what is typical for each.

Step 2: Set a budget (and keep a buffer)

Use the renovation cost calculator to get an indicative range for your home, then add a buffer of about 10 to 15% for changes and surprises. Remember what quotes often leave out: furniture, appliances, curtains, and sometimes permit or management fees. If you need financing, read how renovation loans work before you sign anything.

Step 3: Choose who to hire

You generally have three routes:

• An interior design firm designs, manages and builds. You pay for design and coordination, and you get one point of contact.
• A contractor builds to your plans. It can cost less, but you do more of the design and coordination yourself.
• A renovation package offers a fixed scope at a set price. It is simple, but changes cost extra. Our article on package vs custom design explains the trade-offs.

Whichever you choose, browse designers and look at finished projects in your type of home, not only the best photos.

Step 4: Compare quotations properly

Give every firm the same brief, then compare quotes line by line, not by total. A cheap quote often leaves things out that appear later as extra charges. Our guide to reading a renovation quotation explains terms such as provisional sums and variation orders, and shows how to line up three quotes fairly.

Step 5: Check credentials and sign a contract

Before paying a deposit, confirm the firm's licences and accreditation on the official lookups. See CaseTrust and HDB licences explained and how to check an HDB licensed contractor. Then insist on a written contract that attaches the itemised quote and drawings. Nine clauses to check covers payments, timelines and warranties. Keep the deposit small and tie later payments to finished work.

Step 6: Permits and approvals

Certain works in an HDB flat need an HDB renovation permit, and the work must be done by a contractor registered with HDB. Condos usually need written approval from the management office, and often a refundable deposit. Both set rules on working hours and noise. Read our HDB permit and rules guide and the condo approval steps, and let your designer handle the paperwork where possible. Do not let works start before approval.

Step 7: What happens during the works

Most renovations follow this order, because later trades depend on earlier ones:

1. Protection of common areas and removal of old finishes (hacking), if needed
2. Electrical and plumbing
3. Waterproofing, then tiling and screeding (wet works)
4. Ceiling and partitions
5. Carpentry (built-in cabinets and wardrobes)
6. Painting and finishing
7. Installation of lights, fittings, glass and appliances, then cleaning

Visit the site regularly, take dated photos, and approve any change in writing with its price before the work is done. Late changes are the most common cause of budget overruns. A realistic BTO renovation timeline and a condo timeline help you plan your move-in date.

Step 8: Handover and defects

Do a proper walk-through: test every tap, switch, socket, door and drawer, and inspect tiles, paint and silicone. Write a signed defects list with dates to fix each item, and hold back the final payment until it is done. Read how the defects liability period works so you know what is covered.

Mistakes first-time renovators make

• Having no buffer for changes and hidden problems
• Agreeing to things verbally instead of in the contract
• Paying a large deposit up front
• Choosing the cheapest quote without comparing what is included
• Making design changes after works have started
• Skipping the handover inspection

Our article on renovation mistakes and how to avoid them goes through each in detail.