GPR Survey in Punjabi Bagh, West Delhi — Utility Detection & Mapping

Redevelopment that goes down, not just up

Punjabi Bagh's plots are large by Delhi standards, and redevelopment here has been unusually ambitious — multi-level basements, lift pits, swimming pools and structural rafts extending close to the boundary.

That changes the survey question. It is not only what services run in the road, but what structure already occupies the ground beneath the pavement line. A raft or basement wall extending under the boundary is invisible on any drawing and decisive for anyone excavating next door.

We survey the full width including the verge and the boundary strip, and report structural findings separately from utility positions, because the two lead to different conversations with different people.

Electrical load that outgrew the colony

Original servicing assumed modest single-family houses. What stands now carries lifts, central cooling, generator sets and in the commercial stretches full retail load, each fed by reinforcement added plot by plot over decades.

The result is shallow, dense and largely unrecorded LT distribution alongside the original network. We plan tighter line spacing on the frontage strips for that reason, since this is where the additions sit rather than in the road centre.

Ring Road frontage and the commercial belt

The Ring Road frontage carries trunk servicing and heavy traffic together, so working windows there are night-only and traffic management is a real programme item rather than an afterthought.

The club and restaurant belt adds kitchen, cooling and generator servicing in a concentrated area, with trading hours that push survey work into the early morning. Both are quoted separately from colony roads.

Trees, boundary walls and access

Mature tree cover along the colony roads forced services to route around root systems as they grew, and later additions took whatever line was available. Verges therefore hold more than the carriageway and less predictably.

High boundary walls and gated frontages restrict where equipment can physically pass, which affects coverage rate. We assess access before quoting rather than assuming an open road.

Who to talk to before you dig

Colony roads answer to the municipal corporation and the Ring Road frontage to the PWD, but the party that matters most on a basement job is frequently the neighbour rather than an authority.

Structural findings under a shared boundary become a civil matter the moment they are disturbed, so we issue those in a schedule the client can put in front of an adjoining owner before work starts rather than after a crack appears.

Utility positions, structural findings and boundary-strip observations are therefore issued as three separate documents, because each has a different audience.

Who commissions this work

Architects and structural consultants lead, usually at design stage when a basement depth is being fixed and the adjoining conditions are still unknown.

Builders follow, commissioning before excavation because a strike or an undermined neighbour stops the job outright. Restaurant and club operators along the commercial belt make up the rest, generally for service routing rather than structure.

This is West Delhi alluvium with made ground above it, and deep basement construction has disturbed the natural profile close to several plots, so we calibrate against the ground actually present rather than a colony-wide assumption.