Denver Construction Roundup: Oct. 12, 2026

Downtown rail work moves to 19th and California this week

RTD’s downtown light-rail rebuild shifted to a new stretch of track. According to the agency’s Downtown Rail Reconstruction project page, full-depth rail reconstruction on 19th Street between Stout and California and on California Street between 19th and 16th could begin as soon as October 12 and run through the first quarter of 2027. Utility work on California between 18th and 17th started October 1 with a single left-lane closure.

The rest of the downtown closure map for October looks like this:

• Stout Street stays at one travel lane between 14th and 19th through late October.
• Colfax Avenue keeps a westbound right-lane closure between Kalamath and Ninth and a sidewalk closure between Seventh and 10th through late November.
• Cherry Creek Bridge on Speer work resumes in early to mid-October and lasts about four weeks.

Buses replace D, H and L Line trains through the downtown loop. RTD still lists the end of the first quarter of 2027 as the finish for both the downtown midblocks and the Colfax alignment. If a cabinet truck or a dumpster has to cross downtown to reach your job, this is the calendar to plan around.

Summit FC broke ground at Santa Fe Yards

On October 1, Denver Summit FC, the city’s National Women’s Soccer League club, broke ground on its permanent stadium at Santa Fe Yards, a 14-acre site at South Broadway and Interstate 25. Mile High CRE reports the stadium, designed by Populous, will hold 12,500 fixed seats and about 13,000 people with its safe-standing zones, with completion targeted for the end of 2028. Denverite puts the cost at roughly $200 million, funded mostly by the ownership group, with the city having bought the land and committing up to $70 million toward infrastructure around the site.

For homeowners in Baker, Overland, Platt Park and Athmar Park, the practical story is two-plus years of heavy trucks on South Broadway and Santa Fe Drive. If you are weighing a home addition or an exterior project along that corridor, ask how construction traffic will route past your block before you set a schedule.

82 for-sale condos in Baker get state money

A few blocks north of the stadium site, Denver City Council voted to accept a $6.3 million Proposition 123 grant for 82 for-sale condominiums at 5th and Acoma streets near Denver Health, Denverite reported October 6. The city passes the money to Elevations Community Land Trust, a statewide nonprofit that will build the units.

• Prices: initial sales prices are expected to run from $285,700 to $371,350 depending on bedroom count, using 2026 figures.
• Who qualifies: buyers earning up to 100% of area median income. Hoodline notes that is $100,800 for one person and $144,000 for a family of four in Denver County this year.
• How it works: a land-trust model. Buyers own the building, lease the land for a monthly fee of about $100, and share in appreciation when they sell.
• Timing: units are expected to reach the market in 2028. No construction start date has been announced.

For-sale affordable housing is rare in Denver. Proposition 123, the voter-approved set-aside of a tenth of a percent of state taxable income for housing, is why this one pencils.

Mar Lee storm drain: open house October 22, construction late this year

The city’s Department of Transportation and Infrastructure has scheduled a virtual open house for the Upper Sanderson Gulch Storm Drain on Thursday, October 22, from 5:30 to 7 p.m. The project installs new storm drains, inlets and manholes along West Oregon Place, South Xavier Street, West Mexico Avenue and South Wolcott Court, with an outfall to Sanderson Gulch just south of Vrain Street. It also includes utility adjustments, roadway reconstruction and new sidewalk, curb, gutter and curb ramps.

Mar Lee has no underground stormwater pipes today; runoff rides the curbs, gutters and cross-pans. The design was finished in 2022 and sat waiting for money. The city says construction funding is now in hand and work is expected to begin in late 2026, with Iron Woman Construction as the contractor.

If your house is on one of those streets, expect the curb and the road in front of it to be torn up at some point. Plan driveway work, landscaping and any exterior project around it, and ask the project hotline (720-248-8715) where your block falls in the sequence. Longer term, a street that finally drains is good news for anyone thinking about finishing a basement.

Costs: steel and electrical still lead, finishes flat

The most recent local cost data is still Mortenson’s third-quarter Construction Cost Index, reported by ColoradoBiz on September 18. Denver nonresidential costs rose 1.37% for the quarter and 6.84% over the year, against 5.6% nationally. The quarter’s biggest movers were electrical systems (up 3.4%), miscellaneous metal fabrication (up 3.3%) and structural steel and metal decking (up 3.2%). Site concrete and reinforcing steel also posted some of the largest local increases, while several finish trades were flat or fell. Denver construction employment averaged 21,200 workers in the first half of 2026, up 4% from a year earlier.

Those are commercial numbers, but the same trades price the beam in your kitchen wall, the footings under your addition and the panel upgrade for your ADU. Our Denver remodeling pricing page shows what this looks like at house scale.

Zoning watch: no votes this week, but dates to put on the calendar

Nothing changed in the rulebook this week. Three things are moving, though:

• Unlocking Housing Choices. After scaling the proposal back in late September, the city now says Phase 1 will go to City Council for adoption in late 2026. Phase 1 limits the mass and scale of new house-sized buildings and adds two bonuses, one for keeping the existing house and one for providing an affordable unit, both limited to properties within a quarter-mile of transit priority streets and rail stations. A floor-area cap was pushed to Phase 2 in 2027. Public meetings run November 4 (virtual), 5 (Carla Madison), 10 (Montbello), 18 (Barnum) and 19 (Harvard Gulch).
• Aurora ADUs. Aurora still allows detached ADUs only on alley lots in Original Aurora and in Painted Prairie. In July, staff proposed allowing internal, attached and detached units on every single-family lot citywide, and council told them to draft an ordinance. Since 2018 the city has permitted nine ADUs and seen five built. No vote has been scheduled. Our Colorado ADU law guide explains the state rule Aurora is working under.
• Data centers. Denver’s one-year pause on new data center applications runs through May 21, 2027, with already-permitted projects exempt.

One housekeeping note: most city offices were closed Monday, October 12 for Indigenous Peoples’ Day, so the permit counters were dark. Online submissions through e-permits still work.

What this means for your project

1. Schedule deliveries around downtown. If your materials cross the central business district or Colfax, build extra time into the delivery window and tell the supplier which streets are closed.
2. Lock the structural and electrical numbers first. Steel, concrete and electrical are still climbing. Finishes are not. Get the beam, footings and panel priced and ordered early, and leave tile and fixtures as the last decisions. Our permit timelines guide shows how much runway each review gives you.
3. If you live in Mar Lee, go to the open house. Ask where your block falls in the sequence, and do not schedule a driveway or an exterior remodel for the same month the street is open.
4. Build to today’s zoning. Denver’s upzoning is a late-2026 vote at the earliest, and Aurora’s ADU rule is still a draft. A detached ADU in Denver and a home addition in either city are legal now.

If you want to talk through how any of this lands on your lot, call BH Builders at (720) 980-3913 and we will walk the scope with you.

Keep reading from the BH Builders blog

• How to Phase a Whole-Home Remodel in Denver
• Moving a Laundry Room Upstairs in Denver
• Windows Before Siding? Denver Remodel Guide

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