Kaustubh Construction Private Limited
Borivali West · Mumbai Suburban
What registered buyers actually paid
₹24,411 – ₹26,573
per sq ft of carpet, agreement value
Covers 80% of 7 agreements filed with MahaRERA.i
Home
1002
Carpet area
430 sq ft
Typical value
₹1.07 cr
Independent analysis · Quietlist · Bengaluru
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Free before you decide: the 14 things to get in writing before you book
Every item comes from a real RERA filing. Send it to the family group before anyone pays a token.
Send the checklist to the family group Read it here →Delivery and registration
Kaustubh Park 91 is registered with MahaRERA as PR1180002503020 and the promoter has declared completion for 30 Dec 2030.
30 Dec 2030
declared completion
51months to go
against the declared date
The completion date and status as they stand on the MahaRERA registration record.
Source · MahaRERA project registration · read 02 Jul 2026
| MahaRERA registration | PR1180002503020 |
| Registered on | 23 Mar 2026 |
| Promoter-declared completion | 30 Dec 2030 |
| Current status | Certificate Signed |
| Against today | 51 months to the declared date |
Approvals and compliance
MahaRERA's defaulter and deregistration lists and the quarterly-progress filing for Kaustubh Park 91 record 1 quarterly progress report since registration.
1quarterly filing
Entries as they appear on MahaRERA's own lists and the project's progress filing.
Source · MahaRERA defaulter, deregistration and QPR lists · read 02 Jul 2026
Promoter record
Kaustubh Construction is the promoter of record on 20 projects registered with MahaRERA, 1 of which carries a MahaRERA regulator flag (insolvency, deregistration, completion lapse or QPR default).
20projects
registered with MahaRERA
1flagged
by MahaRERA
Counted across Quietlist's full MahaRERA register store, matched on the promoter name as it appears on each filing.
Source · MahaRERA register, all projects · read 02 Jul 2026
Construction
In Kaustubh Park 91, ₹2.74 Cr of a declared ₹61.95 Cr estimated project cost is reported as incurred, about 4.4%, as at the last certified filing with MahaRERA.
4.4%
₹2.74 Cr
of ₹61.95 Cr declared cost
Cost incurred as last certified to MahaRERA. It is a financial measure, not a survey of site work, and it can lag on-site reality between filings.
Source · MahaRERA quarterly progress filing · read 02 Jul 2026
Sales
In Kaustubh Park 91, 0 of 37 homes filed with MahaRERA are recorded as sold or booked, about 0%, and 37 remain available.
0%sold
0 of 37 homes
Counts as the promoter filed them at the last compliance date; this is the filed inventory, not current availability.
Source · MahaRERA sold/unsold inventory filing · read 02 Jul 2026
The units recorded as unsold on the filing. The reckoner value is the government's ready-reckoner assessment the promoter filed against that unit, the figure stamp duty is charged on. It is not a price anyone paid, not an asking price, and not a valuation of the home.
| Floor | Unit | Carpet | Govt reckoner value |
|---|---|---|---|
| Floor 1 | A102 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 1 | B103 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 1 | C104 | 681 sqft (63.28 sqm) | ₹1.20 Cr |
| Floor 1 | D101 | 681 sqft (63.28 sqm) | ₹1.20 Cr |
| Floor 1 | D102 | 873 sqft (81.07 sqm) | ₹1.54 Cr |
| Floor 1 | D104 | 645 sqft (59.88 sqm) | ₹1.14 Cr |
| Floor 2 | A201 | 558 sqft (51.82 sqm) | ₹98.38 Lakh |
| Floor 2 | A202 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 2 | A204 | 635 sqft (58.98 sqm) | ₹1.12 Cr |
| Floor 2 | B203 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 2 | C204 | 681 sqft (63.28 sqm) | ₹1.20 Cr |
| Floor 2 | D201 | 681 sqft (63.28 sqm) | ₹1.20 Cr |
| Floor 2 | D202 | 873 sqft (81.07 sqm) | ₹1.54 Cr |
| Floor 2 | D204 | 645 sqft (59.88 sqm) | ₹1.14 Cr |
| Floor 3 | A301 | 558 sqft (51.82 sqm) | ₹98.38 Lakh |
| Floor 3 | A302 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 3 | A304 | 635 sqft (58.98 sqm) | ₹1.12 Cr |
| Floor 3 | B303 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 3 | C304 | 681 sqft (63.28 sqm) | ₹1.20 Cr |
| Floor 3 | D301 | 681 sqft (63.28 sqm) | ₹1.20 Cr |
| Floor 3 | D302 | 873 sqft (81.07 sqm) | ₹1.54 Cr |
| Floor 3 | D304 | 645 sqft (59.88 sqm) | ₹1.14 Cr |
| Floor 4 | A402 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 4 | A403 | 494 sqft (45.85 sqm) | ₹87.05 Lakh |
| Floor 4 | B403 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 4 | C404 | 681 sqft (63.28 sqm) | ₹1.20 Cr |
| Floor 4 | D401 | 681 sqft (63.28 sqm) | ₹1.20 Cr |
| Floor 4 | D402 | 873 sqft (81.07 sqm) | ₹1.54 Cr |
| Floor 4 | D403 | 722 sqft (67.12 sqm) | ₹1.27 Cr |
| Floor 4 | D404 | 645 sqft (59.88 sqm) | ₹1.14 Cr |
| Floor 5 | A502 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 5 | B503 | 430 sqft (39.96 sqm) | ₹75.86 Lakh |
| Floor 5 | C502 | 616 sqft (57.26 sqm) | ₹1.09 Cr |
| Floor 5 | C504 | 714 sqft (66.33 sqm) | ₹1.26 Cr |
| Floor 5 | D501 | 681 sqft (63.28 sqm) | ₹1.20 Cr |
| Floor 5 | D502 | 873 sqft (81.07 sqm) | ₹1.54 Cr |
| Floor 5 | D504 | 645 sqft (59.88 sqm) | ₹1.14 Cr |
No units are declared mortgaged, reserved, investor-held or not-for-sale in this inventory filing.
Read from MahaRERA on 04 September 2026
MahaRERA publishes, home by home, what this promoter filed: which homes are sold and which are not, the RERA carpet area of each, and for the sold ones the registered agreement value — the consideration filed for that specific home. On this project 7 homes carry one, and 122 of the 129 are recorded unsold. Since we started watching this ledger, 7 homes have moved out of the unsold list, most recently on 04 September 2026.
Here is one of those unsold homes, priced against what buyers of the same home on other floors actually filed:
| Home | Carpet | Filed for the same home on other floors | Based on |
|---|---|---|---|
| 1002 | 430 sqft | Rs 1.0750 cr typical, over Rs 1.0500 cr to Rs 1.1000 cr | 4 filed at this size |
A filed consideration is what was registered for one {unit}. It is not a valuation, and MahaRERA does not publish the date of any of these agreements — read a range as a spread, not as a trend. An unsold row means no sale had been filed for it when we looked, which is a filing state, not a promise that the {unit} is available to you today. One of the two observations is an archived copy whose time is the moment the file was written, not a portal fetch time.
In Kaustubh Park 91, 36 of the 122 unsold homes have agreements filed on their own stack. The Sales Report gives each of them its own row — the filed agreements behind that stack listed in full, the government reckoner value the promoter filed against it, and whether it is mortgaged to a lender while still on the unsold list. Built from the filing itself, sent by email.
The buildings and wings registered under this project, with each tower's sanctioned height and declared completion date. Here the tallest tower rises to G+7 and 19 homes are registered across the project.
| Building | Wings | Floors | Homes | Declared completion |
|---|---|---|---|---|
| Rail Nagar CHS Ltd. | 4 | G+7 | 19 | - |
Unit mix on the filing: 76 residential.
No buyer complaints were on this project's MahaRERA record at the time of reading.
The promoter has declared 7 court cases on this project to MahaRERA. Litigation can cloud the land title or stall the build — have a lawyer pull the cause list for each and confirm whether it touches the title to your home. This is declared by the promoter; there may be further cases not on the RERA record.
| Court | Case no. | Year | Status |
|---|---|---|---|
| City Civil Court, Dindoshi Branch | 2671 | 2024 | Ongoing |
| City Civil Court, Dindoshi Branch | 0002219 | 2023 | Ongoing |
| City Civil Court, Dindoshi Branch | 0002220 | 2023 | Ongoing |
| City Civil Court, Dindoshi Branch | 0002218 | 2023 | Ongoing |
| City Civil Court, Dindoshi, Mumbai | 0000322 | 2023 | Ongoing |
| City Civil Court, Dindoshi, Mumbai | 0000321 | 2023 | Ongoing |
| City Civil Court, Dindoshi, Mumbai | 0001662 | 2023 | Ongoing |
Located at Borivali West, L.T.ROAD , Borivali, Mumbai Suburban, 400091. Per the filed land record, the plot is bounded to the north by C.T.S No.53A, to the south by C.T.S No.64, to the east by C.T.S No.49,51 & 52 and to the west by C.T.S No.13. These are the boundaries as recorded in the filed land record.
The nearest major job hub is ~14 km away — a real but liveable commute to the nearest job hub — factor peak-hour traffic.
| Landmark | Straight-line |
|---|---|
| Andheri MIDC / SEEPZ | 14 km |
| Powai / Hiranandani business park | 17 km |
| Chhatrapati Shivaji Int'l Airport | 18 km |
| Bandra Kurla Complex (BKC) | 21 km |
| Lower Parel / Worli business district | 28 km |
| Nariman Point / Fort | 36 km |
Straight-line distances from the geocoded project locality (the RERA address is an area, not a door) — directional, not door-to-door drive times. Check the actual road route, the nearest metro station and daily-need shops/schools/hospitals on a site visit.
🔒 What I’d do as a buyer here · Drawings Report
The report opens with what this project really is — read from its approved drawings — then the specific calls: the cheapest good way to buy here, the home to say no to, what you can stop worrying about, and what to get in writing before you sign anything.
🔒 Which home to ask for · Drawings Report
The home-level read: which ones to prefer and which to avoid, what the drawings put around each, and the things on this site nobody at the sales desk will tell you about.
The approved drawings
Everything above is on this page already, free, from the government record. The approved drawings are different: the sheets the builder filed to get Kaustubh Park 91 approved show what sits under each tower, which floor holds machines, and what the sales sheet leaves out. Nobody reads them for you. We do.
What that turns up — from other projects’ filings:
ATS Knightsbridge · Sector 124, Noida
You pay for 10,000 sq ft. The floor inside your home is 6,982 sq ft. The rest is walls, shared circulation and services. Get both numbers written into your agreement before you pay any booking amount.
Oberoi Elysian · Goregaon East, Mumbai
“The building is complete.” The tower has reached full height — true. The same filed certificate, same page: sanitary fittings 6% done. Ask for a possession date in writing.
Godrej Aristocrat · Sector 49, Gurugram
Paying extra for the top floor? The terrace drawing shows what sits on the slab above those flats: the overhead water tanks, the lift machine rooms and the roof machinery. Ask which flat sits under which.
Prestige Camden Gardens · Thanisandra, Bengaluru
The approved parking table asks for 12 visitor spaces. It shows 0. Two-wheeler spaces: also 0. Ask in writing where visitors will park.
Buying in Kaustubh Park 91?
With 4.4% of the project cost incurred, there is no finished building to walk through — the approved drawings are the only place to see what you are buying. We read every approved drawing on Kaustubh Park 91’s file and tell you which homes we would ask for, what sits around them, and what to get in writing before you pay the token.
This page is the free MahaRERA filing summary on Kaustubh Park 91. Both readings below are built from that same filing. See a real one first:
Sales Report sample: Palmspring Towers → · Drawings Report sample: Oberoi Elysian – Tower A → · browse all sample reports →
Payment is confirmed automatically. The Sales Report is delivered on payment. The Drawings Report is 1 working day. We email the link, so you can close the tab.
Sales Report · ₹2,999
Every home still unsold, beside what was filed for the same home on other floors · delivered on payment
Not useful to your decision? Full refund — no questions asked.
Drawings Report · ₹4,999
Every drawing on file, read — which home to ask for · 1 working day
Not useful to your decision? Full refund — no questions asked.
Paying from outside India? Pay $35 (Sales Report) and $59 (Drawings Report) via PayPal, or email hello@quietlist.in for a card invoice. Prefer to talk first, or have a portfolio to check? Same address. An information aid for your own due diligence, not legal or investment advice.
Free · Watch this project
We'll email you when this project's RERA record changes, and send the 14-point booking checklist with the first email.
Kaustubh Construction Private Limited is the promoter on 8 MahaRERA-registered projects, with none currently carrying a regulator flag — a reassuring wider track record (matched on the promoter name in the register; it doesn't guarantee this specific project, but a clean portfolio is a good sign).
See every Kaustubh Construction Private Limited project & its RERA track record →
Flags are from MahaRERA's own published problem lists — not a claim about the developer's intent. Explore every flagged project on our Mumbai, Thane & the MMR RERA red-flag register.
Last checked against the RERA register: 10 Sep 2026