Which Home Projects Can Be Priced From an Address?

More exterior work can be priced before anyone visits the house. You type your address on a contractor's website, confirm the house on a map, answer a couple of questions and see a price range. That works well for some projects. For others it can't work at all, and the reason is easy to see once you know what the software measures.

This guide is a guest contribution from Measured Bid. Measured Bid is estimating software for exterior contractors. Teams price jobs from an address in the dashboard, and homeowners get a price range from a widget on the contractor's website. Both use the contractor's own pricing.

Measured Bid measures roofs, gutters, walls and rooflines. It does not measure windows or glass. The second half of this guide covers why windows, shower glass, mirrors and storefront glass still need an on-site visit, using Colfax Glass's own measuring and code guides.

Address-based measurement is a way to size a house for an estimate without a site visit. You enter the street address. The software uses aerial imagery and property data for that parcel to calculate the numbers a job is priced on.

With Measured Bid, the address becomes gutter runs, downspouts, roof area and wall area in seconds. The contractor's own rates are then applied. A homeowner sees a price range, and the contractor's team sees an estimate with line items.

The method has a built-in limit. It can only measure what is visible from above or what can be calculated from the footprint of the house and its number of stories.

The projects that work share one trait. Each is sold by a unit you can calculate from above, such as feet of eave, feet of roofline, squares of roof or square feet of wall.

Measured Bid publishes the list of trades it measures along with the unit each one is priced by. Here is how they line up.

You can look at the raw numbers yourself. A free roof lookup from Measured Bid returns roof area, squares and the pitch of each roof plane from an address, with no prices shown. The result also shows the year of the aerial imagery and a confidence level, which tells you how much to trust it.

Walls take one more step than roofs. The roof outline, minus the overhang, gives the length of the walls. Multiply that by the height of each story and you have the gross wall area.

Measured Bid's free tool that estimates wall area from an address starts with an 18-inch overhang and 9 feet per story. It adds the triangles above the gable end walls. Then it subtracts a flat share for windows and doors, 10% for siding and 15% for paint.

That last step matters for anyone planning window work. The tool never counts your windows or sizes them. It takes off a percentage. A percentage is close enough to price paint. It tells a window company nothing about the size of any one window.

A replacement window is built for one opening. Colfax Glass's guide on how to measure windows for replacement calls for three width readings, three height readings, the jamb depth and both diagonals on every window. The order goes in at the smallest width and height, rounded down to the nearest 1/8 inch.

None of those numbers can be seen from the air. Windows sit in vertical walls under the eaves, often behind porches and trees. Even a sharp street-level photo can't show jamb depth, and jamb depth decides whether a retrofit insert fits or the old frame has to come out.

The cost of a wrong number is different too. Most gutters are cut or formed on site to the length of each run, so a first estimate that is a few feet off gets corrected on install day. A window that is 1/8 inch too big won't go in. The same Colfax Glass guide says an oversized window has to be reordered, which adds two to six weeks and a restocking fee of 15 to 25 percent.

Here is what an installer checks at each opening that no aerial image shows.

The same rule applies to every piece of custom glass. Tempered glass can't be cut or trimmed after it is tempered, so each panel is ordered at its final size. The measurement has to be right before anything is ordered.

Shower enclosures are the clearest case. Colfax Glass notes that many foothill homes built before the 1990s have walls 1/4 to 1/2 inch out of plumb across a 6-foot shower opening. A frameless panel has to be made to match that lean. Glass around a tub or shower must also be safety glazing when its bottom edge sits less than 60 inches above the standing surface.

Custom mirrors are cut to the wall they hang on, including cutouts for outlets or switches. Storefront glass adds commercial rules. Every door lite and the sidelites beside the door are safety glazed, and tempered panels come from the tempering plant at exact size. That is why glass companies, including Colfax Glass, measure on site before they give a price.

Use this table as a starting point when you plan exterior work. The middle column says whether a first price range can come from the address alone. The last column lists what still needs someone at the house.

It is close enough for a first price range, with an error you should know about. Measured Bid tested its gutter footage against 9 invoiced jobs from a gutter company in the Sacramento region. The median absolute error was 14.2% and the mean was 16.2%. Four of the 9 jobs came within 10%.

Those 9 jobs were also used to tune the engine, so a new house may miss by more. Misses ran short more often than long, with 6 of the 9 jobs coming in under the invoiced footage. Only gutter footage has been tested so far. Roof area and wall area have not yet been checked against independent measurements.

The price range is built to carry that uncertainty. By default it runs 10%, 15% or 25% either side of the estimate, depending on the confidence level, and it widens when the data is weaker. Every job should still be confirmed on site before materials are ordered. Measured Bid's published accuracy test lists every job, including the misses.

Tree cover is the biggest reason. Aerial data can't see roof that sits under heavy trees, and missing roof shows up as missing footage. In Measured Bid's test, the largest miss was a two-story house that came in 38.5% short, with imagery from 2015 and part of the roof under trees.

Tall pines and oaks over a foothill roofline cause the same problem. When less than 90% of the roof is modeled, the confidence drops to low and the price range widens. Treat a wide range as a sign that the on-site number may move.

Older homes add a few more gaps. An addition built after the imagery was taken won't be in it, and the estimate flags imagery that is five or more years old. Walls that step down a slope, such as a walkout basement on a hillside lot, need to be measured on site. So do stone or brick sections that won't be painted or sided.

Snow country changes the roof and gutter conversation too. Above Colfax, toward Foresthill and the higher ridges, a contractor will want to see where snow slides off the roof and where ice builds up before settling on gutters and guards. For roofing, the aerial also can't see how many layers of old roofing are on the house or what shape the decking is in.

Many foothill homeowners bundle exterior work into one season. The order of the work matters more than how each part is priced.

If the roof is being replaced, do it before the gutters. Roofers work at the eave, and new gutters can be damaged during a tear-off. If you are re-siding, plan the windows with the siding. Window flashing ties into the weather barrier behind the siding, and Colfax Glass's measuring guide notes that full-frame replacement is also used when the exterior cladding is replaced at the same time. Paint goes last, once new windows and trim are in.

For pricing, split the list. The roof and wall trades can get price ranges from your address the same day. Windows are made to order after the measurement, so book that visit early. For window replacement in Colfax and nearby towns, the in-home visit is where the window price comes from.

Building an ADU puts all of these trades on one schedule, plus Title 24 energy rules and egress windows for any bedroom. Colfax Glass's guide to ADU window and glass requirements covers the glass side.

Start with your fire hazard zone, which is itself an address lookup. Placer County's Fire Hazard Severity Zone page lets you enter an address and find the parcel on Cal Fire's map. The county notes that new construction and renovations in designated zones must follow wildland-urban interface building codes.

For new buildings in those areas, the 2025 California Wildland-Urban Interface Code, in effect since January 1, 2026, covers several items in this guide. Section 504.8 lists multilayered glazing with at least one pane of tempered glass as one way to meet the window rule. Section 504.4 requires an approved way to keep leaves and debris out of gutters. Section 504.10.2 calls for vent mesh between 1/16 and 1/8 inch.

Whether those rules apply to a window replacement on an existing home depends on the scope of the work. Colfax Glass walks through the triggers in its guide to fire-resistant windows for foothill homes. Here is how the common hardening upgrades split.

Treat the address-based trades and the glass work as two tracks. These steps keep both moving at the same time.

If a job is measured along the roof edge or across the walls, an address can get you a first price range, often the same day. Expect that range to be confirmed on site. Expect it to be wider when trees cover the roof or the imagery is old.

If a job is measured by the opening or the pane, it needs a tape measure. That covers windows, glass doors, shower enclosures, mirrors and storefront glass. For those jobs, the site visit comes first and the price follows it.