How to Brief Your Surveyor — A Checklist for Architects

When an architect tells us a previous survey was useless, the drawing is usually accurate. What went wrong was upstream: nobody agreed the contour interval, the datum, the extent, or the layer structure before anyone went to site. The surveyor delivered what was asked for, and it was not what was needed.

This is a checklist of what to settle before appointment. It takes ten minutes on a phone call and saves a revision cycle. At Yogeshwar Associates we ask most of these questions ourselves — but a brief you write once can be sent to any surveyor, and it tells you a great deal about the one you are speaking to by how they answer.

Call now — +91 96577 17268Tap to speak to a surveyor directly.

1. What you are designing, and at what stage

Say this first, before any technical parameter. A concept-stage survey for a villa on a sloped plot and a working-drawing survey for a fit-out need different densities of detail.

• Building type and rough footprint
• Stage — concept, sanction file, or construction
• Whether the site is sloped, wooded, built-up, or has an existing structure

A surveyor who does not ask what you are designing is measuring, not surveying. The difference shows in what they choose to pick up.

2. Contour interval

• 0.25 m — flat or gently graded plots where plinth and drainage are tight; interiors and fit-outs
• 0.5 m — the usual choice for most residential and commercial plots in and around Pune
• 1 m — large or steeply sloped parcels where the shape matters more than the centimetre

Specify it. If you leave it open, you will get whatever is standard for that surveyor, and the redraw is on your time.

3. Datum — the single most common failure

This is where surveys quietly go wrong.

• Assumed datum — the surveyor picks a point on site, calls it 100.000, and measures everything relative to it. Fine for a standalone building. Useless the moment you need to tie into anything outside the plot.
• MSL (mean sea level) — real, absolute levels, tied to a known benchmark. Needed when your design has to meet a municipal drain invert, an existing road level, a neighbouring plinth, or a flood line.

Ask which one you are getting, in writing. A drawing on an assumed datum looks identical to one on MSL. You find out the difference when the drainage does not fall.

If you need MSL, also ask where the benchmark was taken from and how far away it is.

4. How far beyond the boundary

The plot line is almost never where the survey should stop. Say what you need outside it:

• The approach road — its level, width and crown, far enough back to design the gradient your car actually climbs
• Neighbouring plinth levels, where setbacks or party walls matter
• Invert levels of the drain or sewer you will connect to
• Overhead lines, poles, transformers and any reservation or road widening affecting the plot

Each of these is cheap to add while the instrument is already set up, and expensive as a second visit.

5. What to plot, specifically

Name the features that will drive your design. On a typical Pune site:

• Trees — with girth and canopy spread if you intend to design around them or apply to the tree authority
• Wells, borewells, septic tanks, natural drains and nallas
• Existing structures, compound walls, gates and their actual positions
• Manholes, chambers and their invert levels
• Rock outcrops, embankments and retaining structures

Anything you do not name may not appear. Surveyors are not mind readers, and "survey the plot" is not a scope.

Call now — +91 96577 17268Tap to speak to a surveyor directly.

6. Boundary basis

Be explicit about what the boundary line in the drawing represents:

Basis	What it means
Physical	The compound wall or fence as it stands today
Record	The line as per the 7/12, property card or sanctioned layout
Both, cross-checked	Physical position shown against the record, with the difference flagged

The third is what you want. A setback measured from a compound wall sitting two feet inside the real boundary is a violation waiting for the sanctioning officer to find.

7. Deliverable format

Say exactly what you want to open:

• File type — DWG (name the version your office uses), DXF, PDF, or all three
• Units — metres or millimetres; state it, do not assume
• Layer structure — your office standard, or ask the surveyor for theirs before they start
• Title block — send yours if you want the drawing to arrive in it
• Coordinate system — if the project needs one, say so upfront; retro-fitting it later is a re-survey, not an edit

8. Access, timing and who opens the gate

The most common cause of a delayed survey is not the survey.

• Who on site has keys, and on which days
• Tenants, occupied flats, or a working factory that limits hours
• Dogs, security, or a watchman who needs a letter
• Whether permission is needed from a society, a tenant or a neighbour

Sort this before the team travels. A wasted site visit is billed to someone.

9. Revisions — agree what is included

Ask what happens when you need a level checked, a feature added, or the drawing in a different format. A surveyor who treats every revision as a new job will cost you more than one whose fee includes reasonable follow-up.

What to send us with the brief

The more of this you have, the better the survey:

• 7/12 extract or property card
• Sanctioned layout or approved plan, if one exists
• Any previous survey drawing, even an old or doubtful one
• A location pin, and a contact number for whoever is on site
• Your title block and layer standard

What this looks like in practice

"Concept-stage topographic survey, 0.5 m contours, MSL datum tied to a benchmark, extent to include 30 m of approach road and the nalla to the north, trees over 300 mm girth plotted with canopy, boundary shown physical against 7/12 record, delivered as DWG 2018 in metres to our title block. Site is accessible weekdays, watchman has keys, contact attached."

Two sentences. That is a brief a competent surveyor can price accurately and deliver against without a single clarifying call — and it is the difference between a drawing you design on and one you argue about.

Why this matters more than the fee

The cheapest quote is almost always the one answering the vaguest brief. When you specify properly, quotes become comparable, and you find out quickly which surveyor understands what an architect actually needs from the drawing.

We work from an office with an in-house architectural and drafting team, so the questions above are the ones we ask before we mobilise. Our topographic survey, contour survey and as-built survey pages set out what each one delivers, and what architects receive from us covers the deliverable in more detail.

Appointing a surveyor for a project in Pune or PCMC? Send us the brief — or call and we will walk through this checklist with you.

Call now — +91 96577 17268Tap to speak to a surveyor directly.