How to Check Property Legality Before Buying: SHM, HGB, and IMB

Of all the stages of buying a house, checking legality is the one most often overlooked — and the most costly if you get it wrong. Land disputes, duplicate certificates, or buildings without permits can tie up your funds for years or make a property impossible to resell. What makes this dangerous is that legal problems are often invisible when you view the house — the physical condition is good, the location is appealing, the price is right, but the trouble lies in paperwork you never checked. The good news is that basic due diligence can be done yourself before involving a notary. Here's the guide.

Recognizing Certificate Types: SHM vs HGB

• SHM (Sertifikat Hak Milik / freehold title) is the strongest form of ownership and has no time limit. It can only be held by Indonesian citizens. This is the ownership type you want most for a personal residence.
• HGB (Hak Guna Bangunan / Right to Build) grants the right to build on and use land for a set period (typically 30 years, extendable). Many properties from developers initially carry HGB status. HGB can be upgraded to SHM through a specific process.

HGB isn't necessarily a bad thing, but you need to know how much time remains on it and the plan for upgrading to SHM. For long-term residence, upgrading to SHM is generally worth doing.

In practice, most new residential properties in developer estates start out with HGB status, and buyers later upgrade to SHM. This is normal and not a problem, as long as you understand the status at the time of purchase and there's a clear path for the upgrade. What you need to avoid is buying without realizing the certificate status, then being caught off guard later when trying to sell or pass the property to heirs.

IMB / PBG: The Legality of the Building

Certificates cover the land; IMB (now PBG — Persetujuan Bangunan Gedung / Building Approval) covers the building. A building without valid permits can cause problems when you apply for a mortgage, resell, or if enforcement action occurs. Make sure the IMB/PBG exists and matches the physical structure standing — the size and designated use should align.

How to Check Certificate Authenticity at the BPN

• Check directly at the local Land Office (BPN) by bringing a copy of the certificate. You can request verification of authenticity and status (whether it's currently pledged as collateral, seized, or under dispute).
• Use BPN's digital services such as the Sentuh Tanahku app for an initial check of certificate status.
• Involve a notary/PPAT for official verification (validation) before the transaction — this is standard practice and shouldn't be skipped.

Takeaway: Always match the name on the certificate against the seller's ID card, and verify the certificate's authenticity with the BPN before paying anything beyond a small booking deposit. A certificate that "will be sorted out later" is the biggest red flag in a property transaction.

Red Flags to Watch For

• The name on the certificate differs from the seller's, without a clear power of attorney.
• The seller is reluctant to have the certificate checked at the BPN.
• The price is far below market value with no reasonable explanation.
• The certificate is still pledged to a bank and the seller has no clear repayment plan.
• The physical land boundaries don't match the area stated in the certificate.
• The building has no IMB/PBG, or the IMB doesn't match the building.

AJB vs PPJB: Don't Confuse Them

• PPJB (Perjanjian Pengikatan Jual Beli / Sale and Purchase Binding Agreement) is an agreement to sell and buy in the future. It does not yet transfer ownership. It's often used when the requirements for the sale aren't yet complete (for example, when the certificate hasn't been subdivided for an off-plan house).
• AJB (Akta Jual Beli / Deed of Sale and Purchase) is executed before a PPAT and forms the basis for transferring the certificate into your name. It's the AJB that legally transfers the rights.

Holding a PPJB alone does not make you the legal owner. Make sure there's a clear path from the PPJB to the AJB and the name transfer before you make a large payment.

Buying from a Developer vs a Secondary Property

The legal risk profile differs depending on who you're buying from:

• From a credible developer, the legality of the parent land is generally already clear and the per-unit certification process is structured. The risk lies more in the timeliness of getting the certificate issued in your name — ask about the schedule and get a written commitment.
• From an individual seller (secondary market), you need to be more cautious: check whether the certificate is still pledged as collateral, the inheritance status if there are multiple heirs, and whether the seller's name matches the certificate. Secondary transactions more often hide unresolved disputes.

Recommended Due Diligence Sequence

• Request copies of the certificate, IMB/PBG, and the latest PBB (land and building tax) receipt early on.
• Match the name and details on the certificate against the seller's ID card.
• Physically check the land and its boundaries, comparing them against the area stated in the certificate.
• Verify the certificate's authenticity and status with the BPN.
• Only once everything checks out clean, proceed to the binding agreement and payment through a notary/PPAT.

One principle simplifies all of this: never transfer large amounts of money before the legal status has been verified. A legitimate small booking deposit is fine, but significant payments should only be made after the certificate check and document completeness are confirmed. If a seller pressures you to pay quickly before the documents are clear, that itself is a signal to be cautious.

Checking legality is a cheap investment of time compared to the risk involved. Once the legal status is secure, you can move on to financing — compare mortgage schemes on Mirailand's bank page, and explore developers with clear legal standing through our developer pages.