Basements, Stilts & Setbacks: Getting the Most from a Tricity Plot

What decides how much you can build on a tricity plot?

Every sector's approved plan fixes how much of the plot you may cover, how far the building must sit from each boundary, and how high it may rise. These numbers, not your wishlist, define the buildable envelope. A corner plot with setbacks on two sides behaves very differently from an interior plot of the same size. For what this means plot by plot, see what each Mohali plot size allows, Chandigarh's sector sheets and frame control and, outside the tricity, plots elsewhere in Punjab.

The first job of an architect is to draw that envelope accurately, then design the richest possible home inside it. Designing first and checking rules later is how projects get redrawn twice.

Start with the right rulebook. The tricity spans three governments: Chandigarh is a Union Territory with its own rules, Mohali is in Punjab and Panchkula is in Haryana. Inside Mohali, a sector's zoning plan can allow less than the state rules, so your sector's sheet comes first.

How do the rules compare across Chandigarh, Mohali, Punjab and Panchkula?

The rules below are those in force as of October 2026 for a typical kothi plot. They change often, so confirm the current text and your sector's sheet before design.

Is a basement worth building under a kothi?

Where permitted, a basement is the cheapest extra space you will build: parking, storage, plant and, where the rules allow a habitable basement, a gym or theatre. It demands real waterproofing, mechanical ventilation and daylight wells, and an access stair or ramp that does not cripple the plan above. Decide it in week one, not month three.

On a 1 kanal plot in Mohali, the 2021 rules allow about 878 sq m (9,450 sq ft) of floor area, but ground plus two full floors reach only about 792 sq m, so a habitable basement, where the sector plan allows one, is how the rest gets built.

• 01Check clear heights: at least 2.4 m in Chandigarh; on Mohali sector plots, 2.75 m if habitable and 2.40 m for parking or storage.
• 02Keep the required distances: 2.44 m from the boundary wall on Punjab sector plots, and in Chandigarh 2.4 m from a neighbouring building without a basement.
• 03Investigate the soil and groundwater before fixing the depth.
• 04Specify the waterproofing system in the drawings, not on site.
• 05Plan light wells; Chandigarh asks for windows of at least 1/20 of the basement floor area.

Does stilt parking make sense on a kothi plot?

A stilt level keeps cars off the street and lifts the main living floor for privacy and views, but check your plot allows it: in Chandigarh a stilt sits within the permitted coverage, FAR and height, so it adds no volume, and the 2021 Punjab plot rules make no stilt provision. The trade-off is a flight of stairs to the living level, which the design must handle gracefully with a lift provision for the long term.

In Panchkula, Haryana's stilt-plus-four order is on hold: the High Court's April 2026 stay was later confined to Gurugram, but on 21 July 2026 the Town and Country Planning Department suspended all further stilt-plus-four approvals until further orders. Confirm the position with HSVP before you design around a stilt.

Where a stilt is allowed, treat it as architecture, not leftover space, and never enclose it later. For a stilt level designed with care, see Agarwal Floors. Where a stilt is not available, a front car porch with a light fibreglass roof, which Chandigarh's Phase I sheets and Punjab's municipal bye-laws allow, often does the job.

How do setbacks shape the plan and the front?

Setbacks are not only lost land. The front setback holds the car, the gate and the garden, so its depth decides whether the house gets a lawn and a porch or only a driveway. Under the Punjab municipal bye-laws the front setback grows with plot size, and plots over 200 sq m also need a 3 m rear setback.

In Chandigarh the sector sheet fixes the front building line and nothing may project beyond its projection line, so balconies and chajjas are designed back from it. On Mohali sector plots the front wall is 0.9 m solid with a 0.9 m grille above, so the front garden becomes part of the elevation.

Why is a double-height cutout worth the floor area?

An over-the-top-storey void, a double-height cut connecting two floors, is the single move that makes a tricity home feel generous rather than boxy. It lets light fall deep into the plan and lets the floors speak to each other. Even a modest 12 by 18 ft void transforms the experience of the whole house.

Place it beside the stair or over the family living room, with high north or east windows. Warm air collects at the top and needs a way out, and high glass needs a safe way to be cleaned.

What should you decide in the first week?

Most redraws trace back to a late decision. Settle these before the first plan, then see our modern kothi design ideas for how the elevation follows.

• 01Which rulebook governs the plot, and whether the sector plan sets lower limits.
• 02The true plot area from the registry and a fresh measurement, since a kanal is not the same size everywhere in Punjab.
• 03Basement or not, and whether it will be habitable.
• 04Where the cars go, and where the stair, lift shaft and double-height void sit.
• 05A first cost check against our 2026 tricity construction bands.