What Most Home Inspection Checklists Forget to Tell You

What Every Checklist Gets Right

To be fair to the checklists already out there they cover an enormous amount of ground, and most of it matters.

A good 2026 home inspection checklist will tell you to verify the RERA registration number, demand the Occupancy Certificate before taking possession, check the Encumbrance Certificate for any pending loans against the property, inspect tile alignment and paint finishing, test electrical points and wiring capacity, look for seepage stains on ceilings, and check the condition of overhead tanks and pump systems if the building depends on borewells or tankers.

This is genuinely good, comprehensive advice. None of it is wrong. Property checklists in India today are more detailed and more buyer-protective than they were five years ago, largely thanks to RERA and a more informed buyer base.

But there is a specific gap that runs through almost every one of these checklists and it sits exactly where the most expensive long-term surprise tends to hide.

The Line That Appears And Then Goes Nowhere

If you read enough Indian property checklists, you will eventually find a line that looks something like this: "Ask about the water source - municipal, borewell, or tanker."

This is progress. Five years ago, even this line rarely appeared. Today it shows up in a growing number of guides aimed at serious homebuyers.

But notice what it does not say. It tells you to ask the question. It does not tell you what to do with the answer.

If the answer is borewell, the checklist usually stops at "ask for a water quality report" and moves on to the next category. It does not tell you what numbers in that report should concern you. It does not tell you that a borewell at 600 ppm hardness is a fundamentally different ownership experience than a borewell at 200 ppm, even though both technically qualify as "borewell water" on paper. It does not tell you that the same checklist box "borewell, water quality report obtained" can describe two flats with wildly different five-year maintenance costs.

This is the gap. Not that water source goes unmentioned. It is that the mention stops exactly where the useful information begins.

Why This Gap Exists

It is worth understanding why even thorough, well-intentioned checklists stop here because the reason explains why the gap is so persistent.

Structural and legal issues are visible and dramatic. A cracked wall, a missing Occupancy Certificate, or an encumbered title are problems that announce themselves immediately or carry obvious legal risk. Hard water does neither. It does not show up in a site visit unless you specifically test for it, and its consequences unfold over years rather than at possession. Checklists are built around what creates urgent risk and water hardness, despite its real cost, does not feel urgent at the moment.

Most home inspectors are trained in construction, not water chemistry. A professional inspector checks structural elements, electrical safety, plumbing leaks, and waterproofing - all legitimate construction concerns. Testing and interpreting water hardness sits slightly outside this training, in a space closer to a water treatment specialist's expertise than a civil inspector's.

There is no standard number anyone has been told to look for. Ask a buyer what an acceptable Encumbrance Certificate looks like and most have at least a rough sense. Ask the same buyer what TDS reading should worry them and almost nobody has an answer because nobody has ever told them what the number means.

What a Genuinely Complete Water Check Looks Like

Here is what belongs in a home inspection checklist, sitting where "ask about water source" currently ends.

Ask for the specific source, not just the category

"Borewell" is not specific enough. Ask whether the borewell is dedicated to your building or shared across the society. Ask how deep the borewell goes, deeper borewells in many Indian cities are now drawing from harder, more mineral-rich rock layers than they were a decade ago. Ask whether the building supplements borewell supply with tanker water during summer months, when groundwater levels typically drop and remaining water concentrates further in dissolved minerals.

Ask for the actual TDS number, not just a quality report

A water quality report can run several pages covering bacterial content, pH, and various contaminants and still leave you with no clear sense of hardness. Ask specifically: what is the TDS reading, in ppm, from this building's water supply? If nobody has an answer, test it yourself.

Test it yourself during the site visit

A TDS meter costs Rs 300 to Rs 500 and takes ten seconds to use. Carry one. Dip it into a glass of tap water from the kitchen or a bathroom during your visit. Below 200 ppm is generally low risk. Between 200 and 400 ppm is moderate and worth monitoring. Above 400 ppm and certainly above 600 ppm is a meaningful hard water condition that will affect appliances, fittings, and plumbing over the years you live there.

Look for the physical evidence that water quality reports do not always capture

Open the kitchen kettle if one is present. White, chalky residue inside confirms hard water regardless of what any report says. Check the base of bathroom taps and the grout lines around fittings for white crust. If the flat has been previously occupied, asking how often the geyser used to get serviced, replaced or repaired more than once in three years is a strong indicator of hard water, independent of any paperwork.

Ask what happens to the supply seasonally

Many buildings that present themselves as primarily municipal-supplied switch to borewell or tanker water during peak summer months when municipal pressure drops. If nobody mentions this proactively, ask directly. The water you are shown during a pleasant site visit in a cooler month may not be the water you live with for three months every summer.

TDS Reading Guide for Property Buyers

What This Gap Actually Costs

This is the section no checklist puts a number on and it is worth putting one here.

A flat on borewell water above 500 ppm hardness costs its owner meaningfully more over five years than an identical flat on soft municipal supply, once you account for accelerated geyser failures, more frequent washing machine servicing, faster degradation of bathroom fittings and glass surfaces, higher detergent and personal care spend, and additional plumbing maintenance as pipes narrow from internal scale.

Spread across a typical five-year ownership window, this difference commonly runs into several lakh rupees not because anything was built badly, and not because of any defect a structural inspector would catch, but purely because of what was dissolved in the water from day one.

No clause in a sale agreement discloses this. No Occupancy Certificate reflects it. It sits entirely outside the documentation-heavy due diligence process that Indian homebuyers have otherwise become very good at, which is exactly why it deserves a permanent place on the checklist rather than a single ambiguous line that ends before it begins.

A Five-Minute Addition With a Multi-Year Payoff

None of this requires hiring a specialist or delaying a purchase decision. It requires five minutes during a site visit you are already making, with a tool that costs less than a takeaway meal.

Ask the specific source. Ask for the specific number. Test it yourself if nobody has a confident answer. Look at the kettle, the taps, the grout. Ask about summer. Then factor whatever you find into your decision the same way you would factor in a structural concern or a missing document not as a dealbreaker necessarily, but as a number that belongs in your true cost of ownership, right alongside the EMI, the maintenance charges, and the registration fees that every other checklist already insists on.

Frequently Asked Questions

The Checklist Line That Pays For Itself

Every other item on a home inspection checklist exists because someone, somewhere, learned an expensive lesson that nobody else should have to repeat. Water hardness is the next item on that list. Five minutes, one cheap meter, and one number written down next to the EMI calculation, that is the entire addition. The payoff shows up every year of ownership, on every appliance, every fitting, every utility bill.