The gates open at 10 this morning, and for the next three days the International Convention City Bashundhara becomes the one place in Dhaka where a flat buyer, a builder and a supplier can all find what they came for. Six expos run together until Saturday, 14 November, under one roof, and the opening ceremony takes place at 11:00 in the Seminar Hall.

This is the 31st Build Bangladesh, the 25th Real Estate Expo, the 28th Power Bangladesh, the 23rd Solar Bangladesh, the 8th Dhaka Lighting and the 8th Water Bangladesh. CEMS-Global USA organises the combined show, and the International Finance Corporation is the strategic partner. Yesterday's preview set out the full programme. More than 200 companies from over 20 countries are exhibiting across 500 booths, and the organisers expect more than 20,000 visitors over the three days. Exhibitors named in the show material include LESSO, Zoomlion, Huawei, Siemens and Walton, and a Sri Lanka Pavilion brings suppliers from across the border.

A buyer walking in today should start where the money goes. The Real Estate Expo halls carry the developers and their projects, and the Build Bangladesh halls carry the materials that decide what a flat actually feels like to live in. Tiles, sanitary ware, doors, windows, lifts, paints and fittings sit side by side, which is the point of the combined format. A family comparing two flats in the same budget can see, in one afternoon, why one builder's finishing costs more than another's.

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What to look for in the materials halls

Rod and cement prices have held steady in recent weeks, with rod in the published range of Tk 92,500 to Tk 94,500 a tonne and cement at Tk 540 to Tk 580 a bag, according to the market ranges tracked by this portal. That steadiness makes the materials halls worth a slow walk rather than a quick pass. Ask a supplier how a product behaves in a Dhaka flat, not only what it costs. A lift that runs quietly matters in a building where the stairwell carries the sound. A water pump that survives a low-voltage evening matters more than a glossy brochure.

The Power Bangladesh and Water Bangladesh halls speak to the same daily worries. Load shedding has eased, but a building that keeps its lift, its water pump and its common lights running through a cut still sells faster than one that does not. Visitors can compare generators, inverters, pumps and water treatment units, and ask the exhibitors what each unit costs to run in a month, not only what it costs to buy.

Solar, light and the Delta Festival next door

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Solar Bangladesh carries its own draw this year. Rooftop solar has moved from a talking point to a line item in housing society budgets, and the exhibitors here include the panels, inverters and installers a society committee would need to price a project. A recent Estate News guide to rooftop solar for housing societies set out what a society gains and what it must settle first, and the stalls here are the place to test those numbers against real quotes.

Dhaka Lighting, now in its eighth edition, covers the smaller choices that change a room: the fittings over a dining table, the light in a stairwell, the fixtures a family touches every evening. None of it is glamorous. All of it is what a buyer notices on the second visit, after the first impression has worn off.

The Delta Festival of Architecture runs alongside the expos from today until Saturday, in the same ICCB complex. Its award winners were named on Tuesday, and the festival gives visitors a look at the projects that won. A buyer who wants to know what good Bangladeshi building looks like right now can walk from a materials stall to the festival halls in a few minutes.

A practical visit

Entry runs from 10 in the morning to 7 in the evening each day. The halls fill up after lunch, so a buyer with a list should arrive early and work through it in order: the project or material first, the price second, the brochure last. Take a photo of the stall number with every quote, because three days of brochures blur into one another by Saturday night.

For builders, the value sits in the supplier meetings. A small developer who finds a reliable lift supplier or a solar installer here saves months of phone calls later. For a family still choosing between a ready flat and one under construction, the show is a crash course in what sits behind the walls. The flat is the finished product. The expo is where the parts are on display, with the people who made them standing beside the stall to answer for them.