Estimating Time

The work of building a price and schedule for your custom home is a project in itself.

There’s a reason that quality project estimates don’t happen overnight. Every home is a collection of thousands of individual components that range from large-scale assemblies like walls and roofs to small items like doorknobs and faucets. The builder has to consider every one of these elements when projecting what it will cost in time and materials to complete the home.

How long this takes varies by project type. For instance, a production builder that builds the same plan over and over will be able to generate estimates on the spot in its design center. That’s because even though the company offers some options to buyers, it’s really mass-producing a cookie-cutter product.

Custom homes are different because each one is unique. Similar to an automobile prototype - many times more expensive than the production line automobile that ensues. An estimate for a simple custom home can easily require 40 hours of staff time, and over 100 hours for very complex architectural design. The logistics of getting the estimate done means those hours will likely be spread out over several weeks.

The builder needs to calculate the time and expense for everything from close review of planning, customer input for open items, RFP creation to site prep, foundation & shell construction, installing the roof, mechanicals, interior finishes and landscaping. Assembling all these numbers is a massive project that requires experience, knowledge and organizational skills. And, of course, time.

In addition, the builder needs to ensure that the products being priced for the home are the ones the customers want and that the budget will support. In many cases, this means investing time to complete planning with design team input and clarifying the product specifications with the customer.

People come to the table with dramatically different assumptions about costs, so the builder needs to clarify these assumptions. For instance, the home’s overall quality level may indicate that it’s safe to base the fixture allowance on standard Delta brushed-nickel faucets, until a discussion reveals that the homeowners are imagining something more expensive. This clarifying work may need to be done for most of the line items in the estimate.

The builder also needs to solicit prices from each trade subcontractor that will work on the home, from the excavator to the plumber and painter. This can be the most time-consuming part of the estimate. If getting the subcontractors’ bids in house weren’t enough of a challenge, those bids also need to be put under a microscope.

That’s because the builder needs to make sure that subcontractors’ estimates are realistic. For instance, if a drywall bid seems low, the builder has to know enough to ask the drywall contractor how many sheets the estimate was based on, and someone on the builder’s staff needs to check those calculations. When asking for bids from 30 trade subcontractors, it’s not unheard-of for one or two to submit inaccurate bids because they were busy and needed to get their estimate to the builder on deadline. That’s why bids must be carefully reviewed.

All this work is about getting the estimate right. Taking the time to do a thorough and accurate job today will save time, expense and headaches tomorrow. It’s an area where patience pays real dividends.


TM Grady Builders’ intent is to share general and/or interesting building industry information through articles on our blog. Article posting dates are included as they may be current or contain potentially dated information. Blogs are informational only and do not necessarily represent the processes and procedures of TM Grady Builders. We hope you enjoy these informational articles as you relax and envision building your dream home. Blog articles are the property of TM Grady Builders and not for reuse by any party.

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