How to Check If a Resale Flat Is Within 4km of Parents for PHG

In practical terms, the PHG 4km rule is a flat-to-home check. The question is not whether the unit is in the same town, near the same MRT station, or generally “close by.” The question is whether that specific resale flat falls within 4km of the relevant family member’s home address for PHG purposes.

HDB defines the rule precisely: the parent's or child's home — an HDB flat or a private residence — must be within 4km of the resale flat, measured as a straight-line distance from residence to residence, not the driving route. Clearing that check is what unlocks the “live near” tier of the grant. As of 2026, that “near” tier is worth $20,000 for an eligible family and $10,000 for an eligible single; living with a parent or child in the same flat (no distance test) is worth $30,000 for a family and $15,000 for a single. Confirm the current amounts on HDB before quoting them.

That matters because it is easy to shortlist by area first. A unit in the same estate can still fail the proximity check, while a unit in a neighbouring estate may still pass. So avoid assuming “this whole neighbourhood should qualify” unless each shortlisted unit has been checked.

The simplest way to frame it: PHG proximity is checked unit by unit. You still need to verify this exact flat against your parents’ home address. For the broader PHG framework, see HDB’s Proximity Housing Grant page and PropKaki’s PHG eligibility guide.

The insight: proximity is not a neighbourhood claim; it is an address-level check. For a broader overview, see HDB Housing Grants in Singapore: EHG, Family Grant, PHG and Singles Support.

The most common PHG mistake is not the map tool. It is the wrong address.

What matters is where the parents or children actually live. Do not assume this from an old NRIC address, a correspondence address, or a vague statement like “they stay around Bishan.” Get the full residential address before screening the flat.

Be more careful when the family setup is not straightforward, for example:

• the parents moved recently
• they are temporarily staying with relatives
• they own one property but live in another place
• you are thinking of a former home address

In these cases, pause before forming a view on PHG. A fast but wrong answer is worse than a slower accurate one. If needed, use the official SupportGoWhere PHG page and verify the live case with HDB before you commit.

Practical takeaway: confirm the residential address first, then check distance. Do not reverse that order. For a broader overview, see Proximity Housing Grant (PHG): Eligibility, 4km Rule and Who Can Apply.

The cleanest workflow is straightforward:

1. Get the exact resale flat address you are considering.
2. Confirm the parents’ or child’s actual residential home address.
3. Run HDB’s Distance Enquiry for Proximity Housing Grant.
4. Save a screenshot or printout of the result for your records and follow-up.
5. Reconfirm the same addresses before you make an offer, pay the option fee, or exercise the OTP.

This matters because PHG screening is most useful before money and expectations are locked in. A saved result is not a legal substitute for HDB’s eventual assessment, but it is a practical record of why you shortlisted or ruled out a unit.

Example: if you are deciding between two nearby resale flats, run the HDB check on both exact addresses before deciding which one better fits the grant plan. That is much safer than assuming both “should be within range” based on the same neighbourhood. For a broader overview, see PHG Near vs With Parents or Children.

If you are making a real purchase decision, HDB should be your first check, not your final confirmation after a map app.

A good way to think about the tools is:

This distinction helps. Map tools are excellent for showing that the flat is near the parents’ estate, the MRT, or a familiar shopping mall. But PHG is not based on how intuitive the location feels. It is based on the official distance check.

If you need a broad overview of PHG before the address-level check, use HDB’s PHG page or PropKaki’s main grants guide. For a broader overview, see How Much Is the Proximity Housing Grant (PHG)? Grant Amounts and What Affects It.

Once the distance screen looks positive, the next step is to make sure the rest of the PHG story still fits. At minimum, confirm that:

• the purchase is for a resale HDB flat
• the relevant parent or child household is the correct one to check against
• the family’s living arrangement matches the PHG basis you are relying on

This is where it pays to slow down if the setup is unusual. For example, if you want PHG for living near parents but the parents may move again soon, that is not a detail to brush aside. It affects how confidently you can count on the grant.

A good way to frame it: the unit appears to pass the distance screen. Next, make sure the rest of the PHG criteria line up before treating it as likely.

For a fuller explanation, see PropKaki’s PHG eligibility guide and, where relevant, the article on PHG near vs with parents or children. If you are single, the way PHG sits alongside other grants is covered in our guide on HDB grants for singles: BTO vs resale.

The best time to run the check is as soon as you have a serious shortlist of actual units.

A practical workflow is:

1. Use your target area only for broad searching.
2. Once a specific flat is shortlisted, confirm the parents’ exact residential address.
3. Run the HDB distance check before you commit.
4. Save the result and refer to it in follow-up.

This is not just admin discipline. It changes decision quality. If you check too late, you may already be emotionally anchored to the flat and start treating PHG as part of the affordability plan. That makes a negative result much harder to manage.

Sharp takeaway: PHG should filter the shortlist early, not rescue the decision later.

Being within the distance requirement is encouraging, but it does not make the grant guaranteed.

This is where wording matters. “Within 4km” is a useful green light for shortlisting and affordability planning, but it is not the same as final grant approval. Other eligibility points still need to make sense for your case and that transaction.

A safer way to hold it: the unit appears to pass the PHG distance check, but review the rest of the PHG requirements before treating the grant as likely. If you are also asking how PHG may affect your grant planning overall, see PropKaki’s guide on how much PHG is.

A practical way to hold it: this flat looks close enough that PHG may be possible, but it needs verifying using HDB’s official distance enquiry before you treat it as eligible.

That does three useful things at once:

• it acknowledges your interest
• it avoids an overconfident assumption
• it makes the next step clear

If you want to move fast, run the HDB check immediately and save the result. That is usually better than debating screenshots from different apps.

The goal is not to be vague here. It is to be precise about the process.

Sources. Grant amounts, income ceilings and rules on this page are from HDB and the CPF Board, current as of 2026 (with effective dates noted where amounts changed recently — e.g. EHG maximums were raised in August 2024). Grants are revised from time to time, so confirm the current figures and your own eligibility on the official HDB/CPF pages before relying on them.

Scope. This is a practical explainer, not financial advice, and does not guarantee any grant for a specific household — eligibility depends on the full HDB assessment.