One of the first decisions every homebuyer faces is whether to buy a ready-to-move home or an under-construction property. One gives you the keys immediately; the other usually gives you a better price and more choice.

There is no single right answer. This guide compares the two on price, GST, risk, loans, rental income and appreciation, so you can make the right choice for your situation.

What do the terms mean?

• Ready-to-move (RTM): The building is complete, the builder has received the completion certificate (CC) and, where applicable, the occupancy certificate (OC). You can move in or rent it out immediately after registration.
• Under-construction (UC): The project is still being built. You book at the current price and pay in stages as construction progresses, then take possession on the promised date.

Ready-to-move vs under-construction at a glance

The GST difference

GST is one of the biggest cost differences:

• Under-construction homes: 5% GST (without input tax credit) on the construction value. For affordable housing — carpet area up to 60 sq m in metro cities like Chennai and value up to ₹45 lakh — GST is 1%.
• Ready-to-move homes: No GST if the builder has received the completion certificate before you buy.

GST is usually charged on the agreement value excluding the land component. Ask your builder for a clear breakdown — and don’t forget that stamp duty and registration apply in both cases. See our stamp duty and registration charges guide.

Advantages of ready-to-move homes

1. What you see is what you get. You can inspect the actual flat, the construction quality, the view and the amenities.
2. No waiting. Move in right away and stop paying rent.
3. No GST after completion.
4. Immediate rental income if you are buying to invest.
5. Lower risk — no chance of project delays.
6. Tax benefits from day one on home loan interest under Section 24(b) (old tax regime).

Downsides: Higher price, limited choice of units, and you need the full down payment and loan amount at once.

Advantages of under-construction homes

1. Lower purchase price. Launch prices are usually lower than prices at completion.
2. Flexible payment plans. Construction-linked payments spread the cost over 2–3 years.
3. Better choice. Pick your preferred floor, facing (including Vastu-friendly east-facing units), and layout.
4. Modern design and specifications.
5. Appreciation potential between launch and possession, especially in growing corridors.
6. Some customisation of interiors if requested early.

Downsides: 5% GST, the risk of delay, and possibly paying rent and EMIs at the same time.

How RERA reduces the risk of under-construction properties

The Real Estate (Regulation and Development) Act gives under-construction buyers strong protection:

• Every project must be registered with TNRERA before it is marketed.
• Builders must deposit 70% of buyers’ money in a separate escrow account used only for that project.
• The completion date is declared and legally binding.
• If the project is delayed, buyers can claim interest or a refund.
• Builders can’t change the approved plan without buyers’ consent.

Always check the project’s RERA registration before you pay. Read our guide on who should opt for RERA-registered projects.

Which option is right for you?

Choose ready-to-move if you:

• Need to move in soon — for school admissions, a job change or to stop paying rent
• Want zero construction risk
• Are buying for immediate rental income
• Have your down payment and loan ready

Choose under-construction if you:

• Can wait 2–3 years for possession
• Want a lower entry price and staggered payments
• Want the best choice of floor, facing and layout
• Are buying in a growing locality where values are likely to rise by completion
• Are buying from a builder with a strong on-time delivery record

Questions to ask before you buy

For ready-to-move homes:

• Is the completion certificate issued? Is the OC available, where applicable?
• Are all utility connections — water, sewage, electricity — in place?
• How old is the building, and what is the maintenance charge?

For under-construction homes:

• What is the RERA number and the declared completion date?
• What has the builder delivered before, and was it on time?
• What is the payment schedule, and how is GST charged?
• Which banks have approved the project?

Asset Tree Homes’ approach

At Asset Tree Homes, on-time delivery is one of our core promises. Our ongoing projects in Madambakkam, Chromepet, Kundrathur and East Tambaram – Thiruvanchery are designed with transparent pricing and construction-linked payment plans. Explore ongoing apartments or ongoing villas.

Frequently asked questions

What does “under construction” mean?

An under-construction property is one where the building is still being built. You book it at today’s price and take possession after completion.

What does “ready to move in” mean?

A ready-to-move property is complete, has its completion certificate and is ready for immediate possession after registration.

Which is cheaper, ready-to-move or under-construction?

Under-construction homes usually have a lower base price, but they attract 5% GST (1% for affordable housing). Ready-to-move homes cost more but have no GST after completion.

What are the risks of buying an under-construction property?

The main risks are delays and quality issues. RERA registration, escrow accounts and buying from a builder with a strong delivery record reduce these risks.

Which property type is better for investment and appreciation?

Under-construction homes in growing areas often appreciate more between launch and completion. Ready-to-move homes give immediate rental income.

Does GST apply to ready-to-move and under-construction properties?

GST applies to under-construction properties at 5% (1% for affordable housing). There is no GST on ready-to-move homes once the completion certificate is issued.

Not sure which suits you? Talk to our team and visit a completed project and an ongoing site on the same day.