BIGBLOC Construction Ltd(BIGBLOC)

NSE: BIGBLOCBSE: 540061

₹ 35.36-3.39%refreshed 23 Oct, 03:30 pm ISTMarket cap: ₹ 501 crWebsite: nxtbloc.in/Updated: 24 Oct 2026

About

BIGBLOC Construction makes autoclaved aerated concrete (AAC) blocks under the NXTBLOC brand and AAC wall panels through a joint venture with Siam Cement Group, and has recently added construction chemicals such as block jointing mortar and ready-mix plaster. Revenue from operations was Rs 283.42 Cr in FY26. Sales volume was 8,26,904 CBM in FY26, from about 1.3 mn CBM of installed capacity. The company says it is India's largest AAC manufacturer by capacity.^[1][2]

Business segments

The company reports a single segment, Building Materials (FY25 annual report).^[2]
AAC wall panels made up about 5% of revenues in Q1 FY27.^[3]
Construction chemicals made up about 5-7% of revenue in Q3 FY26. Until the new plant started, this segment only traded products.^[4]

Products and brands

AAC blocks, the flagship product, are sold under the NXTBLOC brand (FY25).^[2]
AAC wall panels are sold as ZMARTBUILD WALL by NXTBLOC through the joint venture with Siam Cement Group, and have test certifications from IIT and ARAI (FY25).^[2]
The company says it is the only one in India able to supply 20-foot wall panels, a product previously imported (FY25).^[2]
Construction chemicals include NXTPLAST ready-mix cement plaster and NXTFIX semi-premix mortar; block jointing mortar and ready-mix plaster were added in Q4 FY26, and NXTGRIP tile adhesive is next.^[2][5]

Plants and capacity

Four plants as of FY25, capacity in CBM per annum: Umargaon (Vapi) 3,25,000, Kapadvanj (Ahmedabad) 2,50,000, Wada (Palghar) 5,00,000 and the Ramosadi (Kheda) JV 2,50,000.^[2]
Installed AAC capacity was 1.3 mn CBM as of FY26.^[5]
Wada, expanded from 250,000 to 500,000 CBM PA and run through a wholly owned subsidiary, is described as India's largest single-location AAC block facility (FY25).^[2]
Kapadvanj is run by subsidiary StarBigBloc Building Material Private Limited, formerly Hilltop Concrete (FY25).^[2]
The Ramosadi plant, run by the Siam Cement BigBloc joint venture, has 250,000 CBM of capacity and can switch between AAC blocks and panels.^[3]
The construction chemicals plant is at Umargaon.^[4]
Rooftop solar capacity is 3.3 MW across four plants. Solar met about 52% of power needs in Q1 FY27, up from about 45% in Q4 FY26 and 36% in Q3 FY26.^[3]
The company says it is the only AAC maker generating carbon credits. As of FY26 it held about 150,000 tons of credits, with no revenue recognised from them in FY26.^[6]

Key operating numbers

Sales volume was 2,21,545 CBM in Q1 FY27, up 32% YoY.^[3]
Sales volume was 8,26,904 CBM in FY26, up 37% YoY, against 6,03,101 cbm in FY25. Q4 FY26 volume was 2,45,870 CBM, up 40% YoY.^[5][2]
AAC block capacity utilisation was about 69% in Q1 FY27 and about 78% in Q4 FY26; the FY26 average was 65%, against 59% in FY25.^[3][2]
Utilisation at the Ramosadi joint venture plant was about 40% in Q1 FY27 and Q4 FY26, compared with 51% in Q3 FY26.^[3]
The Bigbloc Building plant ran at about 89% utilisation in Q4 FY26. StarBigBloc ran at 90% in Q2 FY26.^[5]
The mortar plant ran at about 20-25% utilisation in Q1 FY27.^[3]

Customers

Customers include developers, ACC and Ambuja Cement (white-labelling), CIDCO and projects such as Lodha Palava; it works with over 50% of the top seven developers in Mumbai (FY25).^[2]
Tata Projects selected the JV's wall panels for Micron's upcoming semiconductor unit in Sanand (FY25).^[2]
Named customers include ITC and L&T. AAC panels are going into bullet train stations on the Mumbai-Ahmedabad route.^[3]
The company won a purchase order from Larsen & Toubro to supply AAC blocks over 6-9 months (Q3 FY26).^[4]
The company received orders from at least two bullet train station projects for AAC wall panels (Q4 FY26).^[5]

Expansion and capex

The company bought 57,500 sq. mt. of land in Madhya Pradesh for a new AAC block plant of 200,000 CBM, which can be expanded to 500,000 CBM.^[6]
Planned capex for the Madhya Pradesh plant is Rs. 75-80 crore, for 2,00,000-2,50,000 CBM of capacity.^[4]
Construction of the Madhya Pradesh plant is planned to start after the monsoon in Q2 FY27, with commercial production targeted in FY28. All approvals are in hand.^[3]
AAC wall panel capacity can be expanded from 250,000 CBM to 500,000 CBM if panel volumes require it.^[3]
Expansion into South India is being evaluated, with possible land purchases in Chennai or Bengaluru (Q2 FY26).^[6]

Recent developments

The mortar plant started operating in May 2026.^[3]
The construction chemicals plant at Umargaon began commercial production in Q4 FY26, after its start was pushed back from Q2 FY26.^[5]

Market Cap

₹501 Cr

High / Low

₹80 / 33

Stock P/E

355.8

Price / Book

4.4

Book Value

₹10

EPS

₹-0.1

No. of Shares

14.16 Cr

ROCE

1.8%

ROE

-1.3%

OPM

2.1%

Debt / Equity

1.47

Sales

₹283 Cr

Net Profit

₹-8 Cr

Promoter holding

72.8%

Loading chart…

Signal history

AI Deep Dive

The analysis Screener can't give you

Our models read the latest earnings call, annual report, and financials end-to-end - then grade management, value the business, and flag the risks. Unlock all of it for this company:

Verdict
The headline call - descriptive label, conviction, and the synthesis behind it.
Valuation
Guidance-anchored P&L bridge - worst / average / best multiple cases.
Walk the talk
Did management deliver on past guidance? A commitment-by-commitment scorecard.
Red flags
Forensic and governance risk pointers, severity-ranked.
Balance sheet
Solvency and earnings-quality score.
Concall briefs
Quarter-by-quarter earnings-call briefs - what changed and why.

₹49 unlocks this company for 90 days, ₹299 for a full year - bundles bring it lower. Built on public disclosures - educational, not investment advice.

AI Deep Dive

Verdict

Locked

The headline call - descriptive label, conviction, and the synthesis behind it.

Company data

Financials