You have found a warehouse or godown for lease and the numbers look tempting — an existing shell, a roof already up, rent that beats buying raw land. Before you sign anything, know this: the same building that saves you a lakh on structure can cost you three lakh more to fix if nobody checked the columns first.
Converting an industrial building into a badminton, pickleball, basketball, or futsal facility can genuinely beat building new — a fresh 36m x 18m indoor hall runs ₹60–95 lakh in India. That saving only shows up if the shell was actually fit for sport. Most warehouses were built for pallets and forklifts, not a badminton rally or a basketball dunk.
This guide covers what to check before you commit, what a retrofit really costs, and where owners lose money by skipping the boring parts.
Structural Assessment Comes First
Before spending on flooring or lighting, get a structural engineer to check three things: column spacing, roof truss height, and floor slab condition. Everything else in this guide follows from these three checks.
Warehouses are not designed with courts in mind. A shed built for racking and forklift aisles often has columns exactly where a sideline should be, or a truss height that clears stacked cartons but falls short of what a shuttle needs on its highest arc.
A one-day structural walkthrough, typically ₹15,000–30,000, tells you whether the building is a candidate at all. Skipping this and finding out after paying a security deposit is the single most expensive mistake in retrofit projects — more on that below.
Clear Span and Column Spacing
A mid-span column — one standing inside where a court needs to be, not along the wall — can force you to shrink the court, reposition it, or walk away from the building. Check column grid spacing against your sport's exact footprint first.
A badminton doubles court is 13.4m x 6.1m. A basketball court is 28m x 15m. A 5-a-side futsal pitch is 40m x 20m. If the column grid is, say, 6m x 6m — common in older sheds — a full basketball court will not fit between two column lines without one standing in the key or on the sideline.
The fix, where one exists, is usually one of three: shift the layout into wider column bays, drop a sport that needs less span, or accept a padded column as a marked obstruction (fine for recreational play, not for competitive). None of these are free, and none should be decided on site — get the column grid drawing first.
Mini-story — Noida, 2025. Rakesh, who runs a small sports academy chain, put down a ₹6 lakh deposit on a Noida warehouse before getting a structural walkthrough. The column grid turned out to be 7.2m x 6m — fine for badminton, but it split his planned basketball court almost down the free-throw line. He redesigned around three badminton courts and a half-court instead, losing his most bookable asset and roughly ₹4 lakh in re-quoted civil and marking work.
Floor Slab: Resurface or Replace
A sound RCC slab in good condition can usually be resurfaced directly with a PU or acrylic coating for roughly ₹30–45 lakh across a 36m x 18m area. A cracked, uneven, or under-designed slab needs partial or full replacement, adding ₹15–35 lakh and 3-4 weeks.
Industrial slabs carry static point loads — racking legs, forklift wheels — not the constant impact a sports surface takes from running and ball bounce. Most are fine structurally, but flatness is the real question: sports surfaces need about 1/8 inch per 10 feet, a tolerance years of forklift wear rarely leaves intact without grinding or a levelling screed.
Get a core test and flatness survey before assuming the slab is a straight resurface job. A slab that looks flat but is off by a few millimetres shows up later as an uneven ball bounce players notice within the first week.
Electrical Load and Rewiring
Most industrial sheds run high-bay lighting on a low-lux circuit built for stacking and picking, nowhere near the 400-600 lux a badminton or basketball court needs. Budget a full rewire with a dedicated sports lighting circuit, typically ₹8–15 lakh, and check whether your power connection can even support it.
This is the retrofit cost owners underestimate most, because the wiring problem is invisible until you try running tournament-grade lighting off a panel built for 150-lux general illumination. An undersized connection also needs a fresh load sanction from the local electricity board, which can take several weeks.
Mini-story — Gurgaon, 2025. Priya converted a leased warehouse near Gurgaon's Udyog Vihar into a four-court badminton and pickleball arena, saving close to ₹18 lakh on shell versus a new build. What she had not priced in was electrical: her connection was sanctioned for 25 kW, and sports lighting plus AC pushed the requirement past 60 kW. The discom load upgrade and rewiring came to ₹11 lakh — more than half of what she thought she had saved.
Ventilation: The Shed Problem
Industrial sheds keep goods dry, not move air for people exercising inside them. A closed metal shed in North India's summer can sit 8-10°C hotter than outside by mid-afternoon, and most have no ventilation retrofit budgeted until players start complaining.
The fix is turbo ventilators and ridge vents for a recreational facility, running ₹3–6 lakh, or full HVAC for tournament-level play or peak-summer coaching, which pushes to ₹8–20 lakh — the same range as a new-build hall, since the equipment cost does not change because the shell is reused.
Humidity matters as much as heat. A sealed shed with no air movement traps monsoon humidity against a new PU or acrylic surface, which can slow cure time during installation and invite surface fungus later if drainage is poor.
Retrofit Cost vs New-Build Indoor Hall
A warehouse retrofit can save ₹15–30 lakh on shell and roof compared to a new 36m x 18m hall at ₹60–95 lakh — but only if the structure needs no major fixes. Add a column relocation, a floor replacement, or a full electrical rewire, and the retrofit total can land at or above the new-build price, with more schedule risk.
| Factor | Warehouse retrofit | New-build indoor hall |
|---|
| Shell & structure | Reused — save ₹15–30 lakh if sound | ₹20–40 lakh (PEB or RCC) |
| Floor | ₹30–45 lakh resurface, or +₹15–35 lakh if slab replaced | ₹30–45 lakh (built to spec) |
| Electrical/lighting | ₹8–15 lakh rewire, possible discom delay | ₹8–15 lakh (designed in from day one) |
| Ventilation/AC | ₹3–20 lakh, often missed at quoting stage | ₹8–20 lakh (planned into design) |
| Biggest risk | Columns / clear height discovered too late | Site selection and soil condition |
| Timeline | 3-4 months if structure is sound; +4-8 weeks if not | 3-5 months, predictable |
The fit-out for a mixed facility inside the shell costs the same per sport as new construction: badminton or pickleball courts run ₹3–8 lakh per court, padel needs its own glass-and-mesh enclosure at ₹9–14 lakh per court and cannot share lines with anything else, and a 5-a-side futsal setup runs ₹15–45 lakh. A box cricket lane adds ₹8–16 lakh. The shell only changes the civil line — fit-out cost per sport is the same whether the roof is new or fifteen years old.
Treat any retrofit total as site-dependent. Two identical-size warehouses in the same city can differ by ₹20–30 lakh purely because one has a clean column grid and sound floor and the other does not.
What Goes Wrong (and What It Costs)
The three costliest retrofit failures: discovering insufficient clear height after signing, an under-designed floor that cannot carry the sports surface, and a missed drainage or humidity retrofit that shows up as fungus or peeling within a year.
- Insufficient clear height, found late. Competitive badminton needs 9m clear from floor to the lowest roof member — basketball and volleyball manage with 7m. A shed at 7.5m looks fine until you realise it rules out competitive badminton, and there is no retrofit fix for a roof that is not tall enough. The structure must be raised or the sport dropped.
- Floor load underestimated. A slab built for static racking loads can hairline-crack under the repeated impact of basketball or futsal if the sub-base was not compacted to a sports-grade standard. Cutting out and repouring sections easily runs ₹8–15 lakh on a 36m x 18m floor.
- Drainage and humidity ignored. Industrial plots often have minimal perimeter drainage since goods storage does not care about standing water at the wall base. Monsoon seepage under a resurfaced floor causes bubbling within one wet season — a ₹5–10 lakh redo a proper site survey would have flagged.
Mini-story — Jaipur, 2025. Vikram bought a disused godown outside Jaipur for ₹42 lakh, planning a four-court badminton and pickleball facility, drawn by the shell savings. He skipped a drainage check because the floor looked dry. His first monsoon pushed groundwater against the foundation on one side, and the resurfaced PU floor bubbled along that wall within four months. Cutting out the strip, re-waterproofing, and repouring cost ₹6.5 lakh and closed the facility for three weeks in his busiest season.
Questions to Ask Before You Sign a Lease or Purchase
- What is the column grid spacing, and does a full-size court fit between the columns without one standing mid-span?
- What is the clear height from floor to the lowest roof member or truss, and does it clear 9m if badminton at any competitive level is planned?
- Has the floor slab been core-tested and flatness-surveyed, or are you assuming it is fine because it looks flat?
- What is the current sanctioned electrical load, and has anyone calculated whether it covers tournament-grade lighting plus AC?
- Is there existing perimeter drainage, and has the site been checked for a monsoon-season water table rise?
A warehouse retrofit is a genuinely good option when the shell checks out — you keep the structure and roof, and put the budget into floor, lighting, and ventilation instead. See the full sports complex construction cost breakdown for how these numbers scale, and compare against the new-build indoor hall guide before committing either way.
