Antaaya Villas, Shilatane, Lonavala

Antaaya Villas is a gated development by Akruti Developers at Shilatane, in the hills near Lonavala, on a 20,743 sq m site. Twenty-two of its 23 villas are four-bedroom homes of about 142 sq m carpet area and one is larger, at about 192 sq m; each has a ground floor, a first floor and a terrace, a private swimming pool, and a tank on its terrace. A club house, internal roads, the transformer and DG set, an underground water tank and a septic tank complete the layout. On a sloping hill site, every villa's water, power, sewage and rainwater has to be carried along the roads to a single set of services - and the site is wet for months each monsoon. The architecture is the architect's; our scope is the MEPF design.

We prepared the water and load calculations and the external MEP layouts in February 2026, revising the layouts to R4 by 22 April; the storm water and drainage design, issued for construction on 22 April after a revision a week earlier; the voltage drop calculation and the external plumbing bill of quantities that month; the pump selection in June; and the water supply riser calculation in August 2026. Power: every villa at 75 W per sq m with its pool and booster pumps, the domestic, drinking-water, sump, landscape and sewage pumps, street and landscape lighting, the club house and three EV chargers add up to 364 kW connected and 146 kW of maximum demand - 162 kVA, 194 kVA with a 20% margin - on a 200 kVA transformer, with a three-phase meter for each villa. Water: about 31 kL a day for some 230 people, and 4.1 kL to top up the pools; a 47 kL underground tank feeds every villa's terrace tank through five duty pumps and a standby on a variable-speed drive, filling them in three hours through risers sized from 32 mm at each villa to a 100 mm main, and each villa has its own pair of booster pumps. Drainage: 150 mm sewer lines laid at 1 in 150 through 96 chambers - inspection chambers and manholes up to about 1.7 m deep, with their invert levels set one by one - to a 32 kL septic tank. Storm water: 200 mm pipes at 1 in 200 with catch basins, road gullies, scupper drains and 200 mm gutters, carrying the run-off down the slope.