Somewhere on the road from Sarjapura towards Hosur, Karnataka ends and Tamil Nadu begins. The road looks the same. Your paperwork does not.
If you are buying your first home anywhere near this stretch, here is the short version of what changes.
Land matters are state matters
In India, most property paperwork is run by the states. There is no single national land record. So the first question is never “how far is it from my office?” It is “which state is this land in?” The title document answers that, not a map app.
Six things that switch
- The RERA authority: K-RERA in Karnataka, TNRERA in Tamil Nadu.
- The land record and how it is formatted.
- The encumbrance certificate portal, which shows past transactions on the land.
- The registration office that records your sale deed.
- The approving authority for the layout and building plan.
- The stamp duty schedule.
What does not switch
The RERA Act, 2016 itself. Your rights under it, such as a refund with interest if the builder fails to deliver as agreed (Section 18), are the same on both sides. GST is also national, so the tax on an under-construction home is the same.
A note for first-loan borrowers
Your bank's legal team will check the title in the state's own format. Telling them early avoids delays. If you are planning a loan, try our EMI calculator to see what a monthly payment looks like before you speak to the bank.
Simple rule
Find the state from the title. Then use that state's websites for every check. Most border confusion disappears once you do this.
The land records, side by side
Each state keeps its own land records, with its own names and websites. Here are the ones you will hear most:
- Karnataka: the RTC (Record of Rights, Tenancy and Crops), also called pahani, through the state's Bhoomi land records system. Registration and encumbrance certificates come through the state's Kaveri online services.
- Tamil Nadu: the patta, chitta and A-register, through the state's land records e-services. Encumbrance certificates and registration come through the registration department's portal, TNREGINET.
The format is different, but the purpose is the same: to show who holds the land on record, its survey number and its classification. Your lawyer reads these alongside the chain of deeds.
A step-by-step check for a border property
- Read the sale deed or title document and note the village, taluk, district and state.
- Note the survey number exactly as written, including sub-divisions.
- Look up the land record on that state's official portal using those details.
- Get an encumbrance certificate from that state's registration portal for a long period.
- Check the RERA registration on that state's RERA website: K-RERA for Karnataka, TNRERA for Tamil Nadu.
- Find the approving authority for the building plan and confirm the plan on the RERA page.
- Ask your bank's legal team whether they lend in that district and what documents they need.
- Get the stamp duty and registration fee from that state's current schedule.
A worked example: why the state changes your budget
Stamp duty and registration fees are percentages set by each state, charged on the higher of the sale value and the government's guidance value. Here is the arithmetic with illustrative rates only. On a ₹75 lakh home, a combined 6% costs ₹4.5 lakh, and a combined 9% costs ₹6.75 lakh. That is a difference of ₹2.25 lakh, which is real money for a first-time buyer. Always use the actual current rates of the state where the land sits, and check if the guidance value is higher than the price you agreed.
GST does not change at the border. On an under-construction home outside the affordable category, at 5%, a ₹75 lakh price carries ₹3.75 lakh of GST, split as ₹1.875 lakh CGST and ₹1.875 lakh SGST. GST is generally charged on the value excluding the land portion; your invoice will show how it is worked out. A home bought after the completion certificate is issued does not carry GST.
Common mistakes near the border
- Trusting the postal address. A PIN code or a nearby town name does not decide the state. The land record does.
- Searching the wrong RERA website and assuming the project is not registered.
- Using a lawyer unfamiliar with the other state's records. Ask your lawyer if they regularly handle that state's documents.
- Budgeting stamp duty at one state's rates for land in the other state.
- Forgetting daily life. Your vehicle registration, ration card, school admissions and local taxes follow where you live. Think about these too.
Your rights stay the same
The RERA Act, 2016 applies in both states. If the promoter fails to give possession as per the agreement, section 18 lets you withdraw and get your money back with interest, or stay and get interest for every month of delay. Section 14(3) makes the promoter fix structural defects or poor workmanship reported within five years of possession, without charge. Each state's RERA authority hears complaints for its own projects under section 31.
Quick checklist
- State confirmed from the title, not a map
- Land record and EC pulled from that state's portal
- RERA number checked on the right state's site
- Stamp duty budgeted at that state's current rates
- Bank told early about the district
Words you will meet, in plain English
- Survey number: the number the revenue department gives a piece of land. It is the anchor for every land search.
- Encumbrance certificate (EC): a record of registered transactions on the land, such as sales and mortgages, for the period you ask for.
- Guidance value: the minimum value the state uses to charge stamp duty, set by area. Duty is charged on this or the sale price, whichever is higher.
- Sub-registrar office: the government office where your sale deed is registered.
- Promoter: RERA's word for the builder or developer.
Living near the border: practical points
Paperwork is only half of it. Daily life near a state line has its own small details worth thinking through before you buy:
- Vehicle registration: a vehicle is registered with the transport office of the state where you live. If you move across the line, ask the transport department what you need to do and by when.
- Address proof: your Aadhaar address, bank records and utility bills should match your new home. Update them soon after you move.
- Schools: state board schools follow that state's syllabus and language rules. Central board schools are common on both sides. Check what suits your children.
- Property tax and utilities: these come from the local body and supply companies of the state where the land is.
- Commute and tolls: drive your daily route at peak hours, and note any toll plazas on the way.
Step by step: what to do after you buy
- Register the sale deed at the sub-registrar office of the area where the land is.
- Apply to transfer the property tax account into your name with the local body.
- Transfer electricity and water connections, if any, into your name.
- Update your address with your bank, employer and insurance.
- Keep certified copies of the deed, EC and land record in your home file.
None of this is hard. It is just easier when you know which state's office to walk into.
The short version
The road does not tell you which state you are in. The title does. Find the state first, then use that state's websites, offices and rates for every check. Your RERA rights and GST stay the same on both sides.