Bought a Resale HDB Flat? When You Can Actually Start Renovating

The Option is exercised, HDB has accepted the resale application, and the question every buyer asks next is simple: when can the contractor start? The honest answer is later than most people pencil in, and the date that matters is not the one on the resale completion appointment. It is the day you actually get the flat empty. Plan from that date and the next few months get much easier. Plan from the wrong one and you end up paying rent or a mortgage on two places while a renovation you thought would be finished has not started.

The timeline, step by step

There are four blocks of time between HDB's acceptance and moving in, and only one of them is the renovation itself.

1. Acceptance to completion: about 8 weeks. HDB's own guidance for buyers is that resale completion is about 8 weeks after HDB's acceptance of the resale application. Until completion, the flat is still the seller's home.
2. Completion to vacant possession: zero to three months. HDB tells sellers they must vacate before the completion appointment, so that buyers can take possession after it. The exception is a Temporary Extension of Stay, covered below, which can keep the sellers in the flat for up to three months after completion.
3. The renovation permit. As an HDB-licensed contractor we handle the permit application, including drawings, scope of work and declarations, and our HDB renovation page publishes that it typically takes 1–2 weeks to process.
4. The works. Our published figures for a full HDB renovation are 6–10 weeks: around 6 weeks for a 3-room flat, 7–8 weeks for a 4-room and 8–10 weeks for a 5-room or executive flat. Resale flats with extensive hacking may take longer.

Add those up for a 4-room resale flat with no extension of stay and you get roughly 16 to 18 weeks from HDB's acceptance to a finished flat, about four months. With a full three-month extension, closer to seven. That is planning arithmetic from published figures, not a promise, but it is a far better starting point than "we collect keys in two months, so we move in two months later".

A Temporary Extension of Stay pushes everything back

Sellers who have bought their next home often ask the buyer to let them stay on after completion. HDB allows it under its Terms and Conditions for Temporary Extension of Stay, and before you agree, it is worth knowing exactly what you are agreeing to, because every day of it is a day your renovation cannot start.

• It is capped at three months from the resale completion date, with no further extension beyond that.
• It is only for sellers moving to a completed property in Singapore that is ready for occupation, not one still under construction. The request is submitted with the resale application.
• Vacant possession moves. Under those terms, the sellers deliver vacant possession only when the extension expires or ends. Legal completion still happens on schedule; you own the flat, you just cannot get in.
• You pay from completion day. The buyers pay all outgoings from the resale completion date, including servicing the housing loan, service and conservancy charges without rebates, and property tax, even though they are not living there.
• Your minimum occupation period starts later. The start point for computing it is set back by the length of the extension.
• You are responsible for the sellers' conduct during it. If there are infringements, HDB will revoke its approval and require the buyers to move in immediately.
• It is a private arrangement. Buyers and sellers may sign their own agreement covering compensation and other terms, and HDB advises including a termination clause. Either side may cancel the arrangement at any time before the completion date. The buyers pay HDB a $20 administrative fee.

None of this makes an extension a bad idea. It can be the thing that gets a sale agreed. But a two-month extension is a two-month delay to your renovation, and the loan, conservancy charges and property tax run the whole time. Put a number on that before you say yes.

What you can do in the eight weeks before completion

You cannot renovate a flat you do not own yet. You can do almost everything else, and buyers who use this window well are the ones whose renovations start the week they get vacant possession.

• Book the inspection. HDB tells buyers to arrange with the sellers to inspect the flat before the completion appointment. It is still the sellers' home, so ask through your agent whether your contractor can come along to measure up and look properly. One visit with a tape measure is worth ten quotations prepared from listing photos.
• Know what you are really taking over. Look at what the previous owner built in: display cabinets, platforms, an old false ceiling, tiles laid over tiles. Removing them is hacking and disposal on your quotation. Our guide to buying a resale flat with unapproved renovation works covers what to look for, and HDB's Technical Executives inspect the flat after accepting the resale application.
• Agree in writing what stays. If the sellers are leaving a wardrobe or a kitchen set you intend to hack out, you are paying to remove it. If they are taking something you wanted, like the water heater, you want to know now.
• Fix the scope and get comparable quotations. For a resale flat, our 4-room cost page publishes that a resale unit adds roughly $5,000–$15,000 versus the BTO equivalent, because older units need more electrical rewiring and waterproofing. A quotation that ignores both is not cheaper; it is incomplete. What a 4-room resale package should include goes line by line.
• Check the contractor's licence. The permit for hacking works is applied for by the contractor, not the owner, so make sure yours can actually apply for it. Our guide to checking an HDB registered contractor shows how.
• Make carpentry decisions early. Carpentry is usually the biggest single line item in a 4-room renovation, and ours is fabricated in our own Singapore factory. Deciding layouts and finishes before completion is time you do not lose later.

Write the start date as an event, not a calendar date

This is the one contract detail that saves the most arguments. If your renovation contract says works start on a fixed date and the sellers are still in the flat on that date, somebody's schedule breaks and somebody wants to be paid for it.

• Tie the start to vacant possession, for example works start within an agreed number of days after you hand over the keys to an empty flat, with the permit approved.
• Tie the first payment to something real. A deposit to secure a slot is normal. A large progress payment before works can start is not. Our guide to renovation payment schedules and deposits explains what a sensible schedule looks like.
• Agree the handover date the same way, as a number of weeks from the start, so a late completion does not quietly eat into the renovation period.

Where you live in the meantime

The four-month arithmetic above is why this question matters. There are three realistic options:

1. Stay where you are until the flat is finished. Simplest, but check your own dates: if you are selling your current home too, your own buyer may be counting on your completion date.
2. Ask for an extension of stay on the flat you are selling, if you qualify, under the same HDB terms described above, this time from the seller's side.
3. Move in and renovate around yourself. Possible, slower, and noisier than people expect. Renovating while living in the flat covers which parts are liveable and which are not.

If the resale flat is in a block with upgrading planned, check that too before you schedule anything; our note on HIP upgrading and your renovation explains why the order matters.

Before completion: a checklist

1. Do I know when HDB accepted the application, and so roughly when completion will be?
2. Has an extension of stay been requested, and have I costed the loan, conservancy charges and property tax for that period?
3. If there is an extension, is there a private agreement with a termination clause?
4. Has my contractor seen the flat, not just the listing photos?
5. Do I have a written list of what the sellers are leaving and taking?
6. Are the quotations I am comparing for the same scope, including rewiring and waterproofing?
7. Does my contract start date depend on vacant possession and an approved permit, rather than a fixed date?
8. Do I know where I am living for the four months or so it will really take?

Planning a resale renovation?

Send us your HDB acceptance date and whether the sellers have asked for an extension of stay, and we will work out a realistic start date with you before you commit to anything. WhatsApp us on 9107 2601. Larry Contractors is an HDB Licensed Renovation Contractor, HB-09-5667H; you can read how we work on our HDB renovation contractor page and see the full figures on the 4-room HDB renovation cost guide.