Estimation question

Google wants to enter the space of construction technology, specifically focusing on shortening the time it takes to construct a building. How would you estimate the market size for this in the US?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Market sizing for a B2B, efficiency focused product where the value driver is time and cost saved, not unit sales.

Frame the market as addressable spend on tools that shorten construction time, not total construction spend.
Estimate total US construction spend: roughly 2 trillion dollars annually across residential and commercial.
Assume a portion is addressable by construction tech software, for example 1 percent of total spend, roughly 20 billion dollars.
Narrow to time shortening tools specifically, like scheduling and site monitoring, assuming 20 percent of that, roughly 4 billion dollars.
Cross check against known construction tech market reports suggesting a market in the low billions to tens of billions.
Present the result as a range and state the biggest driver of uncertainty, adoption rate in a traditionally slow to change industry.

Frames the market correctly around addressable tech spend, not raw construction industry size.
Uses labeled, round assumptions and shows the narrowing logic step by step.
Cross checks against a plausible reference point instead of stopping at the first number.
Flags industry specific risk, slow tech adoption in construction, as the key uncertainty.

Confusing total construction industry size with the addressable market for a tech product.
Skipping the narrowing step from construction tech to time shortening tech specifically.

How would you validate the addressable percentage assumption with real data?
What would be your go to market wedge given how fragmented the construction industry is?