Same Buildings, Different Blocks: How Block Form Shapes Life in Indian Cities

Two neighbourhoods can hold the same buildings and still produce very different daily lives. What changes is the block: how far apart the streets are, whether buildings hold the street edge, where the public street ends and private ground begins, and whether several uses share one structure. This article compares eight block types on four measures, reads four Indian fabrics from OpenStreetMap at one scale, and argues that Indian plot-by-plot setback rules and gated layouts are quietly choosing block form, and with it behaviour, by default.

Introduction: the block as a behavioural system

Urban design debates in India usually start with the building (its height, its floor area ratio, its facade) or with the road (its width and its traffic). The unit in between, the block, gets far less attention. Yet the block decides how often a walker meets a corner, whether the building edge makes a street or a compound wall, and how many steps lie between a front door and a shop. This post builds on a graphic I shared on LinkedIn, which set eight block types side by side; here the same idea is tested against research and against real Indian maps.

The argument runs in four steps. The article first summarises what research says about block size, connectivity and edges. It then compares eight block types on four measures: permeability, street edge, privacy and mix of uses (Figure 1). Next it reads four Indian fabrics, from Jaipur, Chandigarh, Gurugram and Pune, at one scale (Figure 2). It closes with what Indian planning rules do to block form and with practical design moves.

What the research says

Jacobs (1961) made the classic case that most blocks must be short, so that streets and chances to turn corners are frequent and different users' paths mix. Later work tested this with measurement. In a comparative study of twelve North American and Australian city centres, Siksna (1997) found that small square blocks of about 60–80 m produced finer circulation, more lot frontages and more continuous fabric than larger blocks, and that street meshes spaced about 80–110 m apart served both pedestrian and vehicle needs well. Large initial blocks tended to be cut later by lanes and arcades, a sign that people make the permeability the plan did not provide.

Smaller is not automatically better. Sevtsuk et al. (2016) modelled pedestrian accessibility in regular grids and reported a non-linear relationship: depending on plot and street dimensions, some larger blocks gave more access than smaller ones. The practical lesson is to size blocks with their plots and streets, not to minimise them blindly.

Connectivity also shapes how many people a street carries. Hillier et al. (1993) showed that, in London areas they studied, the configuration of the street grid accounted for much of the variation in pedestrian movement, which they called natural movement. At a wider scale, the meta-analysis by Ewing and Cervero (2010) found that walking was most strongly associated with land-use diversity, intersection density and the number of destinations within walking distance. Block form touches all three.

Two further strands matter for India. The first is the edge. Gehl (2010) describes how ground floors that are open, varied and close to the walker keep people on the street, while long blank or set-back frontages empty it. Panerai et al. (2004) trace how the European perimeter block, which held the street edge, was dismantled into free-standing slabs and towers in open ground during the twentieth century. The second strand is the cul-de-sac. Southworth and Ben-Joseph (1995) show how street standards that favoured hierarchical, looped and dead-end layouts spread through suburban design, trading connectivity for quiet. Superblocks sit between these strands: in Barcelona, Mueller et al. (2020) estimated that the full 503-superblock plan could prevent about 667 premature deaths a year, mainly through lower air pollution, noise and heat, but those superblocks are made by closing through-traffic inside an existing fine grid, not by building large closed estates.

Method and sources

Figure 1 is an indicative drawing: each type is drawn on the same 96 m square, and the dot ratings are my reading of the research above rather than measurements. Figure 2 uses OpenStreetMap (OSM) extracts made on 9 October 2026 for four 900 m by 900 m windows. Blocks were formed from public streets, excluding service roads and ways tagged as private. Three readouts were computed for each window: the typical block (the area-weighted median, that is, the block that a typical square metre of land sits in), junctions with three or more public arms per square kilometre, and the share of mapped street length tagged as private. OSM coverage varies; building data in the Jaipur and Chandigarh windows are visibly incomplete, so the figures describe the map as mapped, not a ground survey.

Analysis

Eight blocks, four measures

Figure 1 draws the eight types on one site so that only block form changes. Read across the dots and a trade-off appears. The perimeter block (1) and the mixed-use block (8) score highest on street edge, because buildings stand on the property line and face the street. The perimeter block buys a private interior with that edge; the mixed-use block gives up some privacy to bring shops and a shared court into the same structure, which creates more reasons to arrive, stay and return. The courtyard block (2) adds a middle step between street and home: a gateway and a shared court.

Figure 1. One site, eight blocks: perimeter, courtyard, superblock, tower in the park, grid of small blocks, linear block, cul-de-sac and mixed-use block drawn on the same 96 m square, with the path people take through or around each and indicative ratings for permeability, street edge, privacy and mix.

Source: Author's indicative drawings, 2026.

The sage line in each drawing shows the movement each form allows. In the grid of small blocks (5) the walker meets a junction roughly every 36 m and can choose between several routes of equal length, which is the behaviour Jacobs (1961) and Siksna (1997) describe. The superblock (3) has the same geometry, but its inner streets become shared ground and cars stay on the outer loop. The tower in the park (4) offers landscape and light, but the walker crosses open lawn to a single entrance and the street loses its wall. The linear block (6) is efficient along its axis but hard to cross sideways, and the cul-de-sac (7) is quiet because it leads nowhere else. None of these types is good or bad in itself. Each is a choice about which behaviour to make easy.

Four Indian fabrics at one scale

Figure 2 sets four real fabrics side by side. Jaipur's walled city, laid out in the eighteenth century, is a grid of large chowkris (wards) cut by bazaars and inner lanes. In the OSM window, the typical block is about 1.7 ha, with about 147 junctions per km² and no mapped gated streets. The Pune peths, the old wards around Shaniwar Wada with their wada (courtyard house) fabric, show a similar typical block (1.7 ha) but the densest junction pattern, about 214 per km², because lanes and galis split the blocks further. These are inherited fabrics in which the street edge is mostly built and most streets are public.

Figure 2. Four Indian block fabrics at one scale: Jaipur walled city, a Chandigarh sector, a Gurugram gated-tower area and the Pune peths, with public and gated streets, junctions and three readouts for each 900 m window.

Source: Author's drawing and measurement based on OpenStreetMap data (© OpenStreetMap contributors, ODbL), extracted 9 October 2026.

The Chandigarh window shows the city's sector system: a superblock bounded by fast roads, with a dense inner network of residential lanes and a central market strip. The typical block is about 1.9 ha and junctions are frequent inside (about 227 per km²), but the sector's edges carry few crossings, so the fine grain is mostly local. In practice this is the superblock trade-off in Figure 1: generous interiors, harder cross-city walking.

Gurugram's Golf Course Road window is the outlier. About 36% of mapped street length is tagged as private, and the typical block, bounded only by public streets, is at least 35 ha, because it runs past the edge of the data. The junction count (about 138 per km²) is inflated by slip lanes at large road junctions rather than by a walkable mesh. Kaushik (2018), using space syntax in Gurugram, reported that a fully gated sector had a more fragmented and less intelligible street network than a non-gated one. Read together, the figures suggest that the tower-in-the-park and cul-de-sac logics, packaged as gated enclaves, now set the block size of much new Indian growth.

Discussion: what Indian rules do to block form

Much of this is decided not by design but by default regulation. The Model Building Bye-Laws refer minimum setbacks for different plot sizes to the Master Plan or to the simplified regulations of the URDPFI Guidelines (Town and Country Planning Organisation [TCPO], 2016). Those guidelines' table of minimum setbacks rises with plot size: no front setback up to 60 m², 3 m above 60 m², 6 m above 500 m², 9 m above 1,000 m² and 15 m above 10,000 m² (Ministry of Urban Development [MoUD], 2015, p. 398). Applied plot by plot, such rules turn every building into an object in its own compound. As plots are amalgamated, the setback grows, the street edge recedes behind walls and parking, and the block drifts from type 1 towards type 4 without anyone choosing it.

The same table also leaves room for a different outcome. It notes that setbacks may be relaxed in special circumstances and that, for compact city planning, the margins may be altered by at least 50% (MoUD, 2015, p. 398). In other words, the instrument for a built street edge already exists; what is usually missing is a block-level plan that uses it. The limits of this argument should be stated plainly. Figure 2 uses four windows and volunteered map data, the dot ratings in Figure 1 are judgements, and most of the cited research comes from Western cities, so its transfer to Indian densities, climate and street life is plausible but untested at scale.

Conclusion: implications for practice

Block form is a behavioural system: it decides how often people meet corners, edges and each other. Indian cities already contain fine, mixed, edge-holding blocks in their old cores, and they are now producing large gated blocks largely through plot-level rules. Five design moves follow:

1. Set a maximum public block size in layout and town planning schemes, with a public through-route at least every 100–150 m in new development, in line with the meshes Siksna (1997) found to work well.
2. Write a build-to line, not only a setback, on shopping and mixed streets, using the existing relaxation for compact planning.
3. Let large sites gate buildings, not streets: keep internal roads public and connected, with gates at the building or the courtyard.
4. Require active ground floors and frequent entrances where blocks meet main streets (Gehl, 2010).
5. Treat superblocks as traffic plans inside a fine grid, as in Barcelona (Mueller et al., 2020), not as an excuse to build closed estates.

Same city, different blocks, different lives. The choice of block is a choice about everyday behaviour, and it deserves to be made deliberately.

Notes

Data. OpenStreetMap extracts via the Overpass API, 9 October 2026; window centres: Jaipur 26.9215 N, 75.8240 E; Chandigarh about 30.7332 N, 76.7718 E; Gurugram 28.4470 N, 77.1000 E; Pune 18.5190 N, 73.8545 E. Map data © OpenStreetMap contributors, ODbL.
Interests. No competing interests.

References

Ewing, R., & Cervero, R. (2010). Travel and the built environment: A meta-analysis. Journal of the American Planning Association, 76(3), 265–294. https://doi.org/10.1080/01944361003766766

Gehl, J. (2010). Cities for people. Island Press.

Hillier, B., Penn, A., Hanson, J., Grajewski, T., & Xu, J. (1993). Natural movement: Or, configuration and attraction in urban pedestrian movement. Environment and Planning B: Planning and Design, 20(1), 29–66. https://doi.org/10.1068/b200029

Jacobs, J. (1961). The death and life of great American cities. Random House.

Kaushik, A. (2018). Gating and syntactical analysis of spatial configuration of sectors of Gurgaon (Gurugram), India. Journal of Construction in Developing Countries, 23(2), 87–106. https://doi.org/10.21315/jcdc2018.23.2.6

Ministry of Urban Development. (2015). Urban and regional development plans formulation and implementation (URDPFI) guidelines (Vol. I). Government of India. https://www.mohua.gov.in/static/uploads/2025/10/1813403503fbec280e7648c0ae692512.pdf

Mueller, N., Rojas-Rueda, D., Khreis, H., Cirach, M., Andrés, D., Ballester, J., Bartoll, X., Daher, C., Deluca, A., Echave, C., Milà, C., Márquez, S., Palou, J., Pérez, K., Tonne, C., Stevenson, M., Rueda, S., & Nieuwenhuijsen, M. (2020). Changing the urban design of cities for health: The superblock model. Environment International, 134, Article 105132. https://doi.org/10.1016/j.envint.2019.105132

Panerai, P., Castex, J., Depaule, J.-C., & Samuels, I. (2004). Urban forms: The death and life of the urban block. Architectural Press.

Sevtsuk, A., Kalvo, R., & Ekmekci, O. (2016). Pedestrian accessibility in grid layouts: The role of block, plot and street dimensions. Urban Morphology, 20(2), 89–106. https://doi.org/10.51347/jum.v20i2.4056

Siksna, A. (1997). The evolution of block size and form in North American and Australian city centres. Urban Morphology, 1(1), 19–33. https://doi.org/10.51347/jum.v1i1.4048

Southworth, M., & Ben-Joseph, E. (1995). Street standards and the shaping of suburbia. Journal of the American Planning Association, 61(1), 65–81. https://doi.org/10.1080/01944369508975620

Town and Country Planning Organisation. (2016). Model building bye-laws, 2016. Ministry of Urban Development, Government of India. http://www.tcpo.gov.in/model-building-bye-laws-mbbl