East Bengaluru buyer answers

Can a real estate consultancy compare under-construction and ready-to-move flats for me?

By Gaurav Mongia, acre&key · Published 16 Oct 2026 · Updated 16 Oct 2026

Direct answer: Yes, and it's one of the more useful things real estate consultancy services can do. A side-by-side comparison should cover total cost, delay risk, GST, loan interest during construction, what you can inspect, the paperwork, and when you can actually live there or rent it out. The right answer depends on your timeline and how much risk you can carry.

Disclosure: acre&key’s advice is free to buyers; we are an authorised sales partner for some projects and may be paid by the developer.

Verify with your lawyer and CA: This page is general guidance on comparing under-construction and ready-to-move flats under the RERA Act and GST law, not legal or tax advice. Before you pay a booking amount, have your own property lawyer review the agreement for sale or sale deed and the OC for your unit, and ask your CA whether GST applies to your payments and how pre-EMI interest affects your tax.

The comparison in one table

Factor	Under construction	Ready to move
Price	Often lower	Often higher
Delay risk	Yes; check the declared completion date	None for possession
What you see	Plans, show flat, site	The actual flat
GST	Usually applies	Generally not, if the whole price is paid after the completion certificate or first occupation
Loan	Staged disbursement; pre-EMI interest may apply	Full disbursement; EMIs start sooner
Rent or move in	Later	Now
Defects	Covered under RERA for five years from possession	Check what's left of the five years
Key document	RERA registration with approvals	Occupancy certificate

GST: the bit that catches people out

Under the CGST Act, construction of a complex or building meant for sale is treated as a supply of service, except where the entire consideration is received after the completion certificate is issued or after first occupation, whichever is earlier. In simple terms, a truly ready flat bought after completion generally doesn't attract GST, while an under-construction one generally does. We haven't quoted rates here. Check the current rate with the developer's cost sheet and your CA.

How real estate consultancy services handle delay risk

For under-construction projects, a consultant should:

check the completion date declared on the Karnataka RERA page;
look at the builder's record on past projects (see builder track record);
check the project's quarterly updates on the portal, if available;
explain your rights under section 18 of the RERA Act if possession is delayed.

Section 18(1) gives you the option of withdrawing with a refund plus interest, or staying and getting interest for every month of delay, if the promoter fails to hand over as agreed.

How they handle "ready" flats

"Ready" can mean different things. A consultant should check:

Is there an occupancy certificate for the building?
Has the khata been issued for the units?
Are utilities (power, water, sewage) permanently connected?
Is the association formed?

See why OC and CC matter.

Which suits you?

Under construction might suit you if your timeline is flexible, you want a lower entry price, and you can carry rent plus pre-EMI.

Ready to move might suit you if you need to move soon, don't want delay risk, and prefer to see exactly what you're buying.

Many buyers look at both. That's sensible.

What does the Act give you if an under-construction flat runs late?

This is the main legal difference between the two choices. With an under-construction flat in a registered project, section 18(1) gives you two options if the promoter fails to complete or hand over by the date in your agreement:

Withdraw. You can ask for the full amount back with interest at the prescribed rate, plus compensation as the Act provides.
Stay. If you'd rather keep the flat, the promoter has to pay you interest for every month of delay until possession.

The completion date that counts is the one in your agreement. It should match the timeline the promoter declared under section 4(2)(l)(C) when registering, so compare the two before you sign. The Authority can extend a project's registration under section 6: for force majeure, which the Act defines as war, flood, drought, fire, cyclone, earthquake or another natural calamity affecting development, and, in reasonable circumstances where the promoter isn't at fault, for up to one year in aggregate. Check the portal for any extension on your project.

What protects a ready-to-move buyer?

Fewer moving parts, but not zero risk. Your key documents are the OC for your unit and a registered conveyance deed. The defect liability in section 14(3) still applies: if the promoter sold you the flat in a registered project, defects reported within five years of handover must be fixed free within 30 days. If the flat is resale, you're buying from an owner, not the promoter, so your protection comes mostly from your lawyer's title work and the sale deed, not from the Act's promoter duties.

How should you weigh the two for your situation?

Ask yourself three questions, in this order:

When do you need to live there? If the answer is "by a fixed date", such as a school year or the end of a lease, the delay risk of under-construction may outweigh the price gap.
Can you carry rent and EMI together? Under-construction often means both. Model it for a year longer than the promised date.
Is the price difference real? Compare the all-in cost of each, including GST where it applies and stamp duty, on written cost sheets. A small headline gap can disappear once those are added.

There's no universal right answer. There's only the one that survives your own numbers.

Before you decide

Work out your all-in cost for both options, including GST, rent and pre-EMI where relevant.
Check RERA status and declared completion dates for under-construction options.
Check OC and khata for ready options.
Visit both at commute time.
Have your lawyer check whichever you pick.

Frequently asked questions

Is under-construction always cheaper?

Usually on base price, not always on total cost once you add GST, rent and pre-EMI.

What if my under-construction flat is delayed?

Section 18 of the RERA Act gives you remedies.

Can a flat be "ready" without an OC?

Some are sold that way. That's a risk for khata, loans and utilities. Ask your lawyer.

Do banks lend on both?

Yes, subject to their checks. Under-construction loans are disbursed in stages.

What about "nearly ready" flats?

Ask whether the completion certificate has been issued and when you'll pay the balance. That affects GST. Also see payment plans.

Can a builder extend the completion date on its own?

No. Extending a project's registration needs the Authority's approval under section 6, which covers force majeure and, where the promoter isn't at fault, up to one year in aggregate. Your agreement's date still governs your section 18 rights.

References

Real Estate (Regulation and Development) Act, 2016, official text hosted by Karnataka RERA (sections 4, 6, 14 and 18). https://rera.karnataka.gov.in/resources/staticpage/Real_Estate_Act.pdf, accessed 15 Oct 2026.
Karnataka Real Estate Regulatory Authority, official portal (project status, agent status, complaints). https://rera.karnataka.gov.in, accessed 14 Oct 2026.
Real Estate (Regulation and Development) Act, 2016, full text PDF (PRS Legislative Research). https://prsindia.org/files/bills_acts/acts_parliament/2016/the-real-estate-%28regulation-and-development%29-act,-2016.pdf, accessed 15 Oct 2026.
CGST Act, 2017, Schedule II para 5(b), CBIC tax information portal. https://taxinformation.cbic.gov.in/content/html/tax_repository/gst/acts/2017_CGST_act/active/chapter21/scheduleii_v1.00.html, accessed 15 Oct 2026.
GST Council flyer, 'The Meaning and Scope of Supply' (Schedule III, sale of building). https://gstcouncil.gov.in/sites/default/files/e-version-gst-flyers/51_GST_Flyer_Chapter3.pdf, accessed 15 Oct 2026.
Greater Bengaluru Authority (successor to BBMP), official site. https://bbmp.gov.in/, accessed 14 Oct 2026.