Bigger Plots, More to Build: DCPR 2034 Area and Open-Space Rules

In Mumbai, how much a housing society can rebuild is never decided by floor space alone. It is shaped by the size and shape of your plot, the width of the road it faces, and the open space, recreation ground and set-back that the Development Control & Promotion Regulations (DCPR) 2034 force you to leave un-built. As a broad rule, a bigger, well-amalgamated plot on a wider road unlocks more construction, but the same regulations then claw part of that back as mandatory breathing space for light, greenery, ventilation and fire engines. Understanding both sides of this bargain is the difference between a redevelopment that is merely legal and one that is genuinely livable. This guide explains how the “more you can build” levers work, what open-space and set-back rules cap them, and what it all means for your society.

DCPR 2034 (formally the Development Control & Promotion Regulations 2034) is the rule-book that governs building in Greater Mumbai under the Municipal Corporation of Greater Mumbai (MCGM). The rest of Maharashtra follows a separate code, the Unified Development Control & Promotion Regulations (UDCPR), so the exact figures your architect quotes will apply only if your plot is inside MCGM limits. There is no single “universal” FSI number for Mumbai, but there are published bands, and this article gives you all of them: the road-width FSI bands of Table 12, and the plot-size slabs of Table-A that decide how much extra carpet each member gets in a MHADA-scheme redevelopment. Once you know your road width and your plot area, you can read your own figure off the tables below.

The single biggest surprise for most committees is the plot-size slab. In a MHADA-scheme redevelopment, a member on a plot above 10 hectares gets 45% extra carpet on top of the basic entitlement, while a member on a plot of just over 4,000 sq m gets only 15%. Same flat, same city, same regulation — three times the additional carpet, purely because of how big the layout is.

Why plot size changes what you can build

“FSI” (Floor Space Index, also called FAR) is simply the ratio between the total built-up floor area you are allowed and the area of your plot. An FSI of 2, for example, means you may build twice the plot area across all floors combined. Two things about your land can push that permissible built-up area up: how big the plot is, and how wide the road in front of it is.

Amalgamating adjacent plots

Amalgamation means legally merging two or more neighbouring plots into one larger development plot. For societies, this usually happens when two or three adjoining buildings agree to redevelop together. A bigger combined plot is not just “more land” — it changes the maths in several ways at once:

• A bigger “plot under redevelopment”. In a MHADA housing-scheme redevelopment under Regulation 33(5), the extra carpet each member gets is fixed by the size of the plot being redeveloped. A merged plot can cross one of the Table-A lines at 4,000 sq m, 2 ha, 5 ha or 10 ha and lift every member into a higher slab (worked through below).
• Efficient open space. Instead of each small plot leaving its own scattered margins and garden, one large layout can pool its mandatory open space into a single usable recreation ground, freeing up more sensible building footprints.
• Room for a proper tower-and-podium design. Larger plots allow podium parking, wider tower spacing, and better fire-tender movement — things that are almost impossible on a cramped single plot.
• Shared amenities. Clubhouses, gyms and society offices become viable when the cost is spread across more flats.

Be clear about one thing amalgamation does not do: merging plots does not widen the road outside them. Road width is a fact about the road. A merger can help only if the combined plot now abuts a wider road that one of the parcels already fronted — it cannot manufacture a higher Table 12 band out of two narrow lanes. Amalgamation is powerful but not automatic: every affected society must consent, boundaries and titles must be clean, and the deal terms have to be fair to each building. Comparing what each society gets under a joint scheme is exactly the kind of thing the offer comparison tool is built for.

Road width and the FSI table

DCPR 2034 links a large part of your buildable area to the width of the abutting road. Table 12 of the regulation sets it out in five bands. The basic (zonal) FSI is 1.33 in the Island City and 1.00 in the suburbs and extended suburbs. On top of that you may buy premium FSI and load TDR (Transferable Development Rights, governed by Regulation 32 of DCPR 2034), and the totals below are what you can finally reach in each band.

Source: sanctioned DCPR 2034, Regulation 30(A), Table 12. Permissible FSI is basic (zonal) FSI + additional FSI on payment of premium + admissible TDR. Many older write-ups still quote the draft bands of 12.20 m, 18.30 m and 30 m — those were replaced by the round metric thresholds above when the regulation was sanctioned, and using them understates your entitlement.

Read it plainly: a suburban society on a lane narrower than 9 m is capped at FSI 1.00, with no premium FSI and no TDR at all. Reach 9 m and the ceiling doubles to 2.00. Reach 27 m and it tops out at 2.50 in the suburbs and 3.00 in the Island City. That is why two identical plots can have very different redevelopment potential — one faces an 8-metre lane, the other an 18-metre road.

Get the 9 m line exactly right, because it is the most costly boundary in the table — and it is the one most often quoted backwards. The sanctioned Table 12 reads “less than 9 m” for the basic band and “9 m and above but less than 12.00 m” for the next one. So a road measuring exactly 9.00 m falls in the higher band and the plot gets 2.00 — not 1.00 in the suburbs, and not 1.33 in the Island City. Anyone who tells you “up to 9 m means basic FSI only” has put the boundary on the wrong side and halved your project on paper. Since 9.00 m is a very common nominal layout width in Mumbai, have the road width measured and recorded in writing before you invite a single bid.

There is a second escape route out of the bottom band, and it is written into Table 12 itself. Note 1 to the table says that a plot abutting a public road of at least 6 m but less than 9 m, which is proposed to be widened to 9.0 m or more, gets the FSI admissible for a 9 m road. MCGM is separately directed to convert roads narrower than 9 m up to 9 m and above where the site allows. So if your lane is 7 or 8 m and a widening line is already proposed on the Development Plan, ask your architect to check whether your plot qualifies for the 9 m band today — that single check is worth a full point of FSI.

The premium FSI in that total is not free. Premium is charged at 50% of the land rate in the Annual Schedule of Rates (ASR) for FSI 1 for the year in which the FSI is granted (Regulation 30(A)(6)). The ASR rate changes from locality to locality, so the rupee cost is genuinely plot-specific — take your ward’s ASR land rate and apply 50% to it, or use the FSI calculator rather than accepting a builder’s round figure. The 60% figure that circulates widely comes from the draft; sanction of the 60% version was refused, so a builder costing your premium at 60% is overstating it by a fifth.

One more Table 12 point matters for large layouts, and it changes the very first number in every calculation. Permissible FSI is worked out on the plot area excluding land under DP roads and roads for which a sanctioned Regular Line is prescribed under the MMC Act, land taken under Regulation 16, Regulation 14 amenity plots, and any Regulation 17 DP reservation to be surrendered to MCGM (Regulation 30(A)(2)). In other words the FSI runs on your net plot, not the raw survey area — so check which figure a builder has used before you accept his buildable-area sum. Where you do surrender that land, TDR for it is available under Regulation 32, Table 12(A), and can be loaded back on the balance plot.

On top of the base entitlement, DCPR 2034 also allows fungible compensatory FSI — additional built-up area (on payment of a premium) that can be used for the flat interiors or added as balconies, flower beds and enclosed areas. Because narrow roads are such a common bottleneck in older Mumbai colonies, we cover them separately in building high-rises on narrow roads.

Plot size decides the extra carpet: the 15 / 25 / 35 / 45 slabs (Regulation 33(5))

Read this before you use any figure in this section. Everything below — the “carpet + 35%”, the 35 sq m minimum, the Table-A slabs and the Table B incentive — belongs to Regulation 33(5), the redevelopment of buildings in an existing MHADA housing scheme. It does not apply to a cessed building. Cessed buildings in the Island City are redeveloped under Regulation 33(7), which has a completely different entitlement formula, set out further down this page. Applying the 33(5) figures to a cessed building is simply the wrong regulation.

Road width sets how much the builder can build. Plot size sets how much you get. In the redevelopment of buildings in an existing MHADA housing scheme under Regulation 33(5), DCPR 2034 builds each member’s rehabilitation flat out of two parts:

• Part (a) — basic entitlement: your existing carpet area plus 35%, subject to a minimum of 35 sq m carpet. Nobody comes out below 35 sq m.
• Part (b) — additional entitlement under Table-A: a further percentage of your existing carpet area, fixed purely by how big the plot under redevelopment is. This is the slab that changes with plot size.

Source: DCPR 2034, Table-A — rehabilitation entitlement under Regulation 33(5), redevelopment of buildings in an existing MHADA housing scheme. Does not apply to cessed buildings under Regulation 33(7). 1 hectare = 10,000 sq m.

Two things to note about the table. First, “plot under redevelopment” means the land demarcated by MHADA — not your society’s share of it, and not the built footprint. Second, the Table-A percentage is applied to your existing carpet area, not to the already-increased basic figure. So the two parts are added, they are not compounded.

The same 40 sq m flat across all four slabs

Take one member with a 40 sq m carpet flat and move him from the smallest slab to the largest. The basic entitlement never changes: 40 + 35% = 54 sq m. Only the Table-A part moves.

Computed from DCPR 2034: basic entitlement (existing carpet + 35%, minimum 35 sq m) plus Table-A additional carpet. Subject to the MIG carpet-area cap.

In plain words: on a 40 sq m flat, the smallest qualifying plot gives you 60 sq m and the largest gives you 72 sq m. That is a 12 sq m difference for the identical flat — roughly the size of a bedroom — decided by nothing except the size of the layout MHADA has demarcated. This is why the first question your committee should ask is not “what FSI are you giving us” but “how many square metres is the plot under redevelopment, and which Table-A slab does that put us in”.

The cap, and shops and offices

The slabs do not run without limit. The maximum rehabilitation area cannot exceed the maximum carpet area prescribed by Government for the MIG category, as applicable on the date of approval. So on the largest plots the Table-A percentage may be trimmed by that ceiling. Ask your consultant for the MIG limit in force on your approval date, because that single figure can cut the top slabs.

If your unit is a non-residential or amenity unit inside a residential housing scheme — a society shop, a dispensary, a bank branch — the entitlement is different: existing carpet area plus 20%. The Table-A plot-size slabs are for residential tenements.

What this means when two societies amalgamate

Now put the slab table together with amalgamation. The slab boundaries sit at 4,000 sq m, 2 ha, 5 ha and 10 ha. If a MHADA layout being redeveloped sits just under one of those lines, crossing it changes the percentage for every member. That, and not road width, is what a merger can actually move: the plot area is something you can add to, the width of the road outside is not. Worked example 3 further down puts real numbers on it. Check where your layout sits against those four figures before you decide to go alone.

The two kinds of open space you must set aside

Open space is not wasted land — it is what keeps a redeveloped colony breathable, safe and worth living in. DCPR 2034 requires two very different kinds of open space, and members often confuse them.

1. Recreational open space (the internal garden)

When a layout is above a prescribed plot size, a portion of it must be reserved as recreational open space (often shown as “RG” for recreation ground or “RO” for recreational open space). This is the shared garden, jogging track or children’s play area inside your compound. The exact percentage and the plot-size threshold at which it kicks in are fixed by DCPR 2034 and depend on the size and category of your layout, so confirm the figure for your plot with your architect rather than assuming a round number. Crucially, this space is meant to be genuinely usable and open to the sky — a long-running legal question has been whether a raised podium deck can be counted as this recreation ground, which we discuss in open space, recreation ground and podium rulings.

2. Marginal open spaces and set-backs (the gap around the building)

Separately, every building must keep a minimum gap between its walls and the plot boundary on all sides — the front, side and rear marginal open spaces, commonly called set-backs. These serve three practical purposes: they let light and air into every flat, they stop your building from crowding the neighbour’s, and — most importantly — they give a fire tender room to reach and encircle the building. The key principle to remember is that marginal open space grows with building height: the taller the tower, the wider the gap DCPR 2034 requires around it. A separate set-back may also be demanded to widen a Development Plan (DP) road, in which case the strip you surrender is usually compensated with Transferable Development Rights (TDR) or extra FSI.

Note what this table does and does not tell you. The direction is reliable — taller means wider margins, stricter fire conditions and additional approvals before work can start. The exact height at which a building is treated as a high-rise, and the exact margin for each height, come from DCPR 2034 read with the fire regulations, and they are revised from time to time. Ask your architect and fire consultant for the figure in force for your building, in writing, and do not accept a round number quoted from memory. Heights are set by Regulation 43 of DCPR 2034 and open spaces within building plots by Regulation 41, so you can ask to be shown the actual clause.

The trade-off: more flats versus a livable colony

Here is the tension at the heart of every redevelopment. The higher your FSI, the more saleable flats the builder gets and the larger the free replacement flat and corpus your members can negotiate. For a cluster scheme under Regulation 33(9) the corpus has a written floor — Rs 50,000 per tenement minimum, meant to fund 10 years of maintenance — so you have a benchmark to argue from rather than a blank sheet. But push the footprint too far and you eat into the very open space and margins that make daily life bearable — parking, a real garden, cross-ventilation, and space for an ambulance or fire engine to reach the lift lobby. A scheme that maximises flats on paper but leaves a dark, airless, fire-trap compound is a bad deal even if every rupee looks attractive.

To see how the “extra” areas — balconies, flower beds, fungible area and the like — add to a member’s carpet area, run the numbers through the additional area calculator alongside the FSI calculator.

Fire access and refuge areas are non-negotiable

As buildings get taller, open space stops being about greenery and becomes about survival. DCPR 2034 read with the fire regulations requires a clear, hard-surfaced path wide enough for a fire tender to move right around a high-rise, and it requires refuge areas — protected floors or terraces where residents can gather safely and be rescued during a fire. These are not optional extras a builder can “design away” to squeeze in one more flat. If a proposed layout leaves no room for fire-tender movement, that is a red flag about the whole scheme, not a minor detail. Our guide to refuge area and fire safety explains what to look for on the drawings before your society signs anything.

Special routes that change the arithmetic

DCPR 2034 also contains dedicated redevelopment routes that carry their own, more generous incentive rules. Which one applies depends on the type and history of your building:

• Old and cessed buildings. Regulation 33(7), 33(7)(A) and 33(7)(B) govern the redevelopment of cessed and old buildings with incentive FSI. Regulation 33(7) covers cessed buildings in the Island City existing before 30 September 1969 that attract the MHAD Act 1976, and MCGM buildings existing before the same date. The eligibility list and the occupiers’ consents are certified by the Mumbai Building Repairs and Reconstruction Board (MBRRB), which operates under the MHADA Act, 1976. The figures for this route are set out in the next section — they are not the 33(5) figures given above.
• Cluster / urban renewal. Regulation 33(9) covers cluster redevelopment, where a whole cluster of old buildings is rebuilt together as an urban-renewal scheme — effectively amalgamation at neighbourhood scale.
• Slum redevelopment. Regulation 33(10) governs Slum Rehabilitation Authority (SRA) schemes — “Redevelopment for Rehabilitation of Slum Dwellers”. An eligible hutment dweller is entitled to a tenement of 27.88 sq m (300 sq ft) carpet, free of cost, and the SRA corpus fund is Rs 40,000 per tenement or as decided by SRA. (Regulation 33(14) is a different rule altogether — it deals with shifting cattle sheds out of Greater Mumbai.) The separate figure of 25 sq m (269 sq ft) that you may see quoted belongs to the BDD chawl cluster schemes under Regulation 33(9)(B); it is not the general SRA entitlement.

Cessed buildings under Regulation 33(7): a different regime altogether

If yours is a cessed building in the Island City, none of the 33(5) arithmetic above applies to you. Regulation 33(7) works on a different basis, and it is worth knowing the four figures that decide your project.

• Total FSI: 3.00 on the gross plot area, or the FSI needed to rehouse the existing occupiers plus incentive FSI — whichever is more. The society is guaranteed the better of the two. This is the single most useful fact about 33(7).
• What each occupant gets: the carpet area he actually occupied in the old building, subject to a floor of 27.88 sq m (300 sq ft) and a ceiling of 120 sq m (1,292 sq ft). Above 120 sq m the occupant pays the developer the cost of construction as per that year’s ASR for the excess, and that excess counts towards rehab FSI but not towards incentive FSI. A residential-cum-commercial occupant gets a minimum of 27.88 sq m; a non-residential occupier gets what he occupied.
• Consent: not less than 51% of the occupiers of the old building, in irrevocable writing. This is the one consent percentage on this page that comes straight out of DCPR 2034, and it comes from Regulation 33(7).
• Incentive FSI rises if you join with neighbours — see the table below.

Source: sanctioned DCPR 2034, Regulation 33(7), sr. no. 5. Additional carpet remains subject to the 120 sq m maximum, and where permissible FSI is 3.0 it may be exceeded by the BUA needed to deliver that 8% / 15% additional rehab carpet. For MCGM buildings, built-up area beyond rehabilitation and incentive is shared MCGM : society of occupants = 1 : 0.5. Older write-ups showing 65% and “three or more plots”, or +5% / +10% carpet, are quoting the draft.

Read the table the way a committee should read it. For a cessed society, joining with neighbouring cessed plots is the one decision that moves incentive FSI from 50% to 60% or 70% and lifts every member’s additional carpet from 5% to 8% or 15%. On a 45 sq m rehab flat that is 2.25 sq m alone, 3.6 sq m in a 2-to-5-plot scheme and 6.75 sq m at six plots or more — free, and written into the regulation. The step to 70% needs six plots, not three, so count carefully before promising your members the top tier. The same 70% tier also applies to redevelopment of municipal properties with an eligible tenement density above 650 per hectare.

Incentive FSI in a MHADA scheme: Table B

Once the rehabilitation area is fixed by the two-part sum above, the developer earns incentive FSI on top of it. The percentage is not negotiated — it is read off Table B using a single ratio called the Basic Ratio, which is the Land Rate divided by the Rate of Construction, both taken from the ASR for the year the Competent Authority approves the project.

Source: DCPR 2034, Table B (MHADA scheme incentive FSI). Land Rate and Rate of Construction are taken from the ASR of the approval year.

This table runs the opposite way to most people’s instinct. A lower land-to-construction ratio gives a higher incentive. A society in a cheaper-land pocket, where the Basic Ratio is 2.00 or below, generates 70% incentive; a society on prime land with a ratio above 6.00 generates only 40%. The reason is viability — where land is cheap, the project needs more incentive area to pay for itself. Where more than one land rate applies across parts of the plot, a weighted average is used. Because the Land Rate comes from your locality’s ASR, the exact ratio is plot-specific; ask your consultant for the ASR land rate and construction rate for your ward and divide one by the other. Whatever is left after rehabilitation and incentive is the balance FSI, shared between the society and MHADA under Table C, with MHADA’s share handed over free of cost.

Cluster schemes under 33(9): the numbers to check

If your buildings go into an Urban Renewal / cluster scheme under Regulation 33(9), four points should be checked in your agreement:

• Corpus fund of at least Rs 50,000 per tenement, created by the promoter or developer, to be used for maintenance of the rehabilitation buildings for 10 years. The High Power Committee can direct a higher amount. If a builder offers less than Rs 50,000 per flat as corpus in a 33(9) scheme, that is below the floor in the regulation.
• Heritage Cess of 5% of ASR on the built-up area of any heritage structure included in the scheme.
• Tenements built for slum rehabilitation are non-transferable for 10 years.
• Approvals run through a High Power Committee headed by the Municipal Commissioner with prior sanction of Government, and its decision is appealable under Section 47 of the MR&TP Act 1966.

An ongoing 33(7) scheme that meets the criteria can be brought into or converted into a 33(9) cluster scheme, but every dilution of reservations allowed under 33(7) has to be restored first.

Each route balances higher incentive FSI against its own open-space, rehab and eligibility conditions, so the “bigger plot, more to build” logic still applies — but with route-specific caps. If you are unsure which regulation fits your building, that is a question for your project consultant, and you can read more in our government policies section.

What amalgamation is worth, in square metres

Put Table 12 and Table-A side by side and the case for merging plots stops being a slogan and becomes arithmetic. Take two neighbouring suburban societies, each on a 3,000 sq m plot, both fronting only an 8 m internal lane — that is, below the 9 m line.

That is the road-width half of the gain. If the layout is a MHADA housing scheme, the merged 6,000 sq m plot also clears the 4,000 sq m Table-A threshold that a smaller plot would have missed. On top of the extra buildable area, the merger buys one pooled recreation ground instead of two cramped strips, and a clean fire-tender loop around a single well-placed tower. The exact margins and open-space percentage still have to be worked out plot-by-plot, but the FSI and carpet figures above come straight off the published tables.

What this means for your society

Before you compare builders on FSI and free area alone, put the open-space and set-back picture on the table. Work through these six in order:

1. Measure the road, then read Table 12. Get the actual width of the road your plot abuts, in writing, and find your band. The four thresholds are 9 m, 12.00 m, 18.00 m and 27 m. That gives you a permissible FSI between 1.00 and 2.50 in the suburbs, or 1.33 and 3.00 in the Island City. Remember that exactly 9.00 m sits in the higher band and gives 2.00, and that a 6–9 m road already proposed for widening to 9.0 m also gets the 9 m band. Check it against the FSI calculator instead of trusting a builder’s headline figure.
2. Measure the plot, then read Table-A. If yours is a MHADA-scheme redevelopment, the plot area decides whether every member gets 15%, 25%, 35% or 45% extra carpet on top of the basic “carpet + 35%”. Write your own number down: existing carpet × 1.35, plus the slab percentage of your existing carpet.
3. Ask to see the open space. Insist on drawings that clearly mark the recreation ground, the marginal set-backs, and the fire-tender path — and check they are usable, not token strips.
4. Test the amalgamation case. If neighbouring societies are willing, model a joint scheme. Check whether the merged plot crosses a Table-A line at 4,000 sq m, 2 ha, 5 ha or 10 ha, and whether it reaches a wider road band under Table 12; the pooled open space and wider frontage may benefit everyone.
5. Weigh liveability, not just carpet area. Light, ventilation, parking and fire access are part of the value you are negotiating for.
6. Keep the governance clean. Follow the Section 79A process and register your project properly so the scheme is legally sound.

Where to find the official rule

The numbers in this article come from four places in DCPR 2034: Regulation 30(A) and its Table 12 for permissible FSI by road width, the premium rate and the net-plot rule; Regulation 33(5) Table-A for the plot-size slabs of additional rehabilitation carpet; Table B for incentive FSI against the Basic Ratio; and Regulation 33(7) for cessed buildings. DCPR 2034 is notified by the Government of Maharashtra and administered for Greater Mumbai by MCGM; the open-space, recreation-ground and marginal-distance provisions sit within that code, read together with the applicable fire regulations. MHADA-linked and slum routes flow from the MHADA Act, 1976 and the relevant DCPR regulations.

One warning that is worth more than any single figure: check whether the document you are being shown is the draft or the sanctioned DCPR 2034. A great deal of material still in circulation — including consultants’ notes and builders’ presentations — quotes the draft. The differences are not cosmetic: the draft road bands were 12.20 m, 18.30 m and 30 m instead of 12.00 m, 18.00 m and 27 m; the draft treated a 9.00 m road as basic FSI only, where the sanctioned table puts it at 2.00; the draft premium rate was 60% instead of 50%; the draft computed FSI on the gross plot area where the sanctioned regulation computes it on the net; and under 33(7) the draft showed 65% incentive with 5% extra carpet at “three or more” plots, where the sanctioned regulation reads 60% with 8%, and 70% with 15% only at six plots. Ask for the sanctioned text published by MCGM (portal.mcgm.gov.in, under Sanctioned DP 2034 / DCPR), quote the clause number, and have a licensed architect confirm the figure for your plot before you rely on it.