How do you use the builder comparison tool?
- Pick two builders you are considering. For each check, tap Yes or No for each builder once you have found the answer, or leave it at Not yet.
- Do at least four checks for each builder; the tool will not pick one before that.
- Read which builder looks stronger, the score for each and any problem found.
How does the comparison work?
Each check is something you can find out yourself, mostly from the K-RERA website, the builder’s finished projects and people who bought from them. A Yes earns the check’s points and a No or an unanswered check earns none, so a builder you have not looked into cannot come out ahead. The score is out of 100.
If the project you are buying into is not registered with K-RERA, or its registration has a problem, that builder is flagged whatever its score. If the scores are within 10 points, the tool calls it too close: other factors such as price, location and the flat itself should decide.
The scoring
On-time handovers 3; RERA, OC, complaints, project visit 2 each; past buyers 1Points for Yes answers ÷ 12 × 100RERA problem flags a builder; under 10 points apart is too close to callWorked example: clear lead
Builder A passes five checks; past buyers are not yet asked. Builder B is on K-RERA with OCs and happy buyers, but handed over late and has several complaints. A scores 92 and B 42, so A looks stronger on what you found.
Worked example: RERA problem
Same answers, but A’s project turns out not to be correctly registered on K-RERA. A still scores 75, higher than B’s 42, yet the tool picks B and flags A: do not book with A until your lawyer has checked the registration.
Where to find each answer
| Check | Where to look |
|---|---|
| Project on K-RERA | Search the project on rera.karnataka.gov.in and match the registration number, plan and completion date with the brochure. |
| Past handovers on time | Compare the completion dates on K-RERA with the actual handover dates for the builder’s finished projects. |
| OC for finished projects | Ask for the occupancy certificates of two or three completed projects. |
| Few complaints or cases | Look at complaints listed on K-RERA for the builder’s projects, and ask your lawyer to search court records. |
| Finished project looks good | Visit a project handed over a few years ago and look at seepage, lifts and common areas. |
| Past buyers happy | Talk to residents or the owners’ association of a finished project. |
What should you keep in mind?
- A good builder record does not make a particular flat a good buy. Check the title and approvals of the project with your lawyer.
- Large builders have more projects and so more complaints in total. Compare complaints against the number of projects handed over.
- Use the builder trust score calculator to look at a single builder in more detail.
Frequently asked questions
Related answers and guides
- Assess Builder Track Record: Bengaluru Diligence Guide
- RERA Registration Lapsed: What Buyers Can Do
- Before Property Registration in Bengaluru: 20 Checks
- RERA Karnataka Project Search: How to Check Any Project
Sources
- Karnataka Real Estate Regulatory Authority, project and complaint search: rera.karnataka.gov.in. Checked 19 Oct 2026.
- Checks and points are acre&key’s guide for comparing builders on facts a buyer can verify; they are not a rating of any builder.
A guide to your own research, not a rating or legal advice. Have your lawyer check the project’s title, approvals and RERA registration, and check costs and tax with your Chartered Accountant before booking.
Buying a home in Bengaluru? Talk to an acre&key advisor.