Ask what a plot can hold and the answer usually starts with FSI. But FSI is the second question. The first is how much of the plot you are not allowed to build on, and in UDCPR that number is not one number.
Key takeaways
- Front margin does not change with height. Regulation 6.2.3(a) applies the Table 6-D figure to a building irrespective of how tall it is.
- Side and rear margins do change. Above the heights in Table 6-D or 6-E they become minimum H/5, where H is the height above ground level.
- H/5 stops at 12.0 m from the plot boundary. Past that height the margin does not grow further, however tall the building goes.
- Parking floors up to 6.0 m are excluded from the height used for that calculation, so a podium does not push a building into a wider margin.
- In a congested area, a holding larger than 0.40 hectare switches to the non-congested rules for everything except FSI, which stays under Regulation 6.1.1. One plot, two rulebooks.
First, which set of rules the plot is under
Chapter 6, Regulation 6.0, UDCPR as updated 30 January 2025 opens Chapter 6 by scoping the congested area regulations: they apply to land in the congested area, or core area, as shown on the Development Plan, and also to gaothan areas in Regional Plans, including areas of local bodies and Special Planning Authorities where no Development Plan or planning proposal is sanctioned.
Then it does something that catches people out.
In a congested area, if the original land holding is more than 0.40 hectare, the regulations of the non-congested area apply, except FSI. FSI in such cases stays as per Chapter 6, Regulation 6.1.1, Residential Buildings / Residential Buildings with mixed-use*.
So a 0.45 ha holding inside a congested area is read out of two different regimes at once: its setbacks, margins and form come from Chapter 6, Regulation 6.2, Regulations for Outside Congested Area (Non-Congested Area), while its permissible FSI comes from the congested area table. Getting that pairing backwards produces a scheme that is either over-margined and under-built, or the reverse, and neither error shows up until the plans are examined.
One naming point worth carrying: 6.1 notes that in Nashik Municipal Corporation the term "core area" is synonymous with "congested area". Nashik's own chapter uses that vocabulary throughout.
The two margins behave differently
Chapter 6, Regulation 6.2.1, Marginal Distances and Set-back for Residential Buildings and Mixed Use* governs residential and mixed use buildings with height up to 15.0 m, or as mentioned in Table 6-D, and that table sets minimum plot size, minimum plot width, setback from the road, side margins and rear margins against the description of the road.
Chapter 6, Regulation 6.2.3, Marginal Distances for Buildings of Higher Heights* then takes over above those heights, and the first thing it does is separate the front from everything else.
Banded by height of the building above ground level
- Front margin, any heightAs given in Table 6-D. Regulation 6.2.3(a) applies it to a building irrespective of its height.
- Up to the heights in Table 6-D or 6-ESide and rear margins on all sides as per those tables
- Above those heightsSide and rear margins on all sides except the front: minimum H/5, where H is the height above ground level
- Where H/5 exceeds 12.0 mSubject to a maximum of 12.0 m from the plot boundary. The margin stops growing.
Source: Chapter 6, Regulations 6.2.1 and 6.2.3, UDCPR as updated 30 January 2025
The consequence of that cap is worth stating plainly. H/5 reaches 12.0 m at a height of 60 m. Above that, every building carries the same 12.0 m side and rear margin: a 60 m tower and a much taller one stand the same distance from the boundary. Height keeps buying floor area and stops buying open space.
Two adjustments to H sit inside the same regulation and both move the arithmetic in the developer's favour.
Parking floors up to 6.0 m do not count. The building height for the purposes of this regulation and for calculating marginal distances is exclusive of the height of parking floors up to 6.0 m. A podium therefore does not drag the building into a wider margin.
Dead walls are treated differently. Where rooms do not derive light and ventilation from the exterior open space, the marginal distance may be reduced to 6.0 m for a special building and 3.0 m for other buildings. The margin exists for light and ventilation, so a wall with nothing to light is not asked to fund it.
The fixed distances that ignore height entirely
Alongside the sliding scale, 6.2.3 carries figures that do not move at all.
- From a recreational open space: 3.0 m for non-special buildings and 6.0 m for special buildings, irrespective of height.
- Redevelopment relief: where a building ceased to exist through accidental fire, natural collapse, or demolition after being declared dangerous, dilapidated or unsafe by lawful order, or where the building is more than 30 years old, marginal distance may be allowed up to 6.0 m for height up to 45 m.
- Small redevelopment plots: below 1000 sq m, one of the side or rear margins of 6.0 m may be relaxed, subject to Fire NOC, in cases of bonafide hardship.
- Plots spanning two authorities: where the owner's land falls within the jurisdiction of more than one authority, a continuous building without a margin at the authority boundary may be allowed with the consent of the other authorities.
The 30 year clause is the one most likely to change a decision. It is not conditional on damage or on any order; age alone qualifies the building, which puts a large part of Maharashtra's older housing stock inside a materially easier margin regime than a new scheme on the same plot would face.
Step margins, and the floor they cannot go below
Chapter 6, Regulation 6.2.3* clause (c) allows step margins on upper floors to achieve the required side or rear marginal distances, subject to a minimum marginal distance of 6.0 m at ground level in the case of a special building. The regulation adds that this provision also applies to congested areas.
That is what lets a tower meet H/5 higher up while keeping a larger footprint at the base. The 6.0 m ground level minimum for special buildings is the limit on how aggressively it can be used, and it exists for access rather than for light: a fire appliance has to reach the building.
Two buildings, and two streets
| Situation | What the regulation requires |
|---|---|
| Two or more buildings in one plot, Regulation 6.2.4 | The distance between two buildings is the side or rear marginal distance required for the taller of the two. A pathway or internal road may be proposed within that distance. |
| Group housing, building abutting an internal road, Regulation 6.2.5 | Minimum 3.0 m setback from the internal road, or the distance between two buildings, whichever is more |
| A Development Plan, Regional Plan, classified or through road passing through a group housing scheme, Regulation 6.2.5 | The normal setback prescribed in the regulations, not the 3.0 m internal road figure |
| Building abutting two or more streets, Regulation 6.2.6 | Setbacks from the streets as if the building were fronting on each of those streets |
6.2.4 is the one that surprises layout designers. The gap between a 12 storey building and a 4 storey building next to it is set by the 12 storey building, so adding height to one tower quietly widens the space around its shorter neighbour as well.
6.2.6 is the one that surprises land buyers. A corner plot pays a front setback on every street it touches, which is why two plots of identical area can yield very differently depending on how many roads they front.
What the register shows about where this bites
Source: ReraGenie analysis of the MahaRERA project registry, 43,610 of 46,654 published projects outside Mumbai City and Mumbai Suburban districts filing building floor counts, captured 11 August 2026
Across the districts UDCPR actually governs, the median project's tallest building is 8 floors, the 90th percentile is 19 and the 99th is 42. Just under half, 48.6 percent, top out at 7 floors or fewer, and 13.3 percent reach 17 or more.
Mumbai City and Mumbai Suburban are excluded from that chart deliberately, and the reason is the first rule in the code. Chapter 1, Regulation 1.1, Extent and Jurisdiction* applies UDCPR to all Planning Authorities and Regional Plan areas except a named list, and the Municipal Corporation of Greater Mumbai heads it. Those two districts are governed by DCPR 2034, so including them would have counted 4,000 projects that these margin rules never touched, and they are the two districts that build tallest, so the distortion would not have been small.
The usual measurement caveat also applies and is sharper in this article than most: UDCPR keys margins to metres and the register files floors. A floor count indicates scale, not the height figure the H/5 calculation actually uses.
What to check on any plot
- Establish congested or non-congested, then check the holding size, because Chapter 6, Regulation 6.0 moves a holding over 0.40 hectare into the non-congested form rules while leaving its FSI behind.
- Take the front setback from Table 6-D and stop adjusting it for height, per Chapter 6, Regulation 6.2.3*.
- Compute H/5 for side and rear, then apply the 12.0 m cap, and take parking floors up to 6.0 m out of H first.
- Count the streets. Chapter 6, Regulation 6.2.6 charges a front setback to each of them.
- On a redevelopment, check the building's age and status first, since 30 years or a dangerous-structure order opens the 6.0 m route up to 45 m, then read the UDCPR FSI rulebook for what may be built in the space that remains.
Where the filings come in
Margins decide the footprint. The register shows what was then declared on it, and whether it arrived. ReraGenie's project analysis, Rs 2,999 for one project, reads a project's full MahaRERA filing: the promoter's extension history with their stated reasons, the slip between original and current completion dates against the median for the same pincode, construction progress against the eleven activity checklist building by building, and complaints and litigation with case numbers. The area consolidated report covers a whole micro-market at Rs 2,999 for the first project and Rs 1,999 per additional one.
Every project's filing is free to read at reragenie.com/projects. For how a city chapter can override all of this inside its own limits, see Pune and Kolhapur, and the question that comes before all of it is which rulebook governs your plot.
Source: Unified Development Control and Promotion Regulations for Maharashtra, UDCPR as updated 30 January 2025. Sanctioned under the Maharashtra Regional and Town Planning Act, 1966.
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