Building for Multifamily Developers in Erie, Boulder and Superior

Erie added nearly 12,000 residents between the 2010 and 2020 censuses, rising from about 18,135 to 30,038, a 65.64 percent jump. That kind of growth is what multifamily developers in the Boulder Valley are chasing, and also what makes their sites hard: utilities that have to be extended, school and road impacts that have to be negotiated, and neighbors who show up to hearings. We build apartments, townhome clusters, senior and student housing and mixed-use buildings for developers who want a contractor involved before the land is entitled.

Housing in this market is shaped by rules that vary almost block by block. A project may sit under a height cap, a floodplain boundary, a water service limit or a fire-rebuild exception, and its construction type, parking solution and unit mix follow from whichever constraint binds first. We help you find that constraint early, price it honestly and design the schedule around the approvals you do not control.

Codes, jurisdictions and the permit path for housing

Colorado has no single statewide commercial building code, so the code a multifamily project is reviewed under depends on the town. As of a January 2026 tracker, Boulder had adopted the 2024 International Building Code, Louisville had done the same, and Lafayette and Longmont were on the 2021 edition with 2024 adoption planned. Energy code follows a state floor: any county or municipality that updates a code on or after July 1, 2023 must adopt an energy code at least as strong as the 2021 IECC.

We check the edition against the date your application will be filed. In Boulder, we also confirm whether any part of the site lies in the 100-year floodplain, since the city requires a Floodplain Development Permit for buildings with any part of their structure in it, including footings and balconies. Our work on permitting and entitlements starts at that point, not after the drawings are done.

Where apartment demand and constraints meet

Erie shows the pressure from one direction. It lies in two counties, with 17,387 residents in Weld County and 12,651 in Boulder County at the 2020 census, and a developer there deals with two sets of county agencies on some items such as roads and drainage in addition to the town. We look at which county a parcel sits in before we price its off-site work, because that decides who reviews and who inspects. See our Erie coverage for the town's current building context.

Boulder shows the pressure from the other. A 1959 city charter amendment limited city water service to areas below 5,750 feet to protect the mountain backdrop, and the city normally caps building height at about 35 feet. Land that is buildable is scarce, so density and construction type become the lever. Buildings in multifamily mixed-use form, with ground-floor commercial and apartments above, are what many of the sites in this market end up supporting.

How we help a housing project get to a permit

On a housing deal we start with the unit mix and parking ratio, then test them against the likely construction type. Wood-frame over a podium, wood-frame walk-ups, and concrete or steel mid-rise each have a different cost per unit, a different fire-rating profile and a different schedule. We price two or three versions, name the assumptions behind them and let you choose with the numbers in front of you.

After that we work with your architect through value review, so savings come from detailing and systems rather than from cutting what residents notice. Typical items we look at are stair and corridor layouts, plumbing stacking, window sizes and mechanical systems that suit an all-electric requirement. When a podium and wrap building is the answer, we model the transfer structure and the parking level early, because that is where the budget tends to surprise people.

The numbers that decide whether a housing pro forma works

Cost per unit rises or falls on a short list of items. Foundations and site retaining are first, followed by electrical service and heat-pump systems under all-electric rules, then elevator and stair count, then envelope performance. Utility extension and impact charges can rival the cost of a floor of building, and they depend on the town and the water provider, so we get them in writing from the agencies rather than guessing.

Rebuild projects have their own arithmetic. Superior lost 398 structures to the Marshall Fire, 393 of them residential, and owners of destroyed property there may apply for exceptions to the energy code and the sprinkler requirements, with additional provisions for the wildland urban interface code for residents of Sagamore. If a project qualifies, the exceptions can change the budget materially. We read the town's rules for the specific parcel and price both the exception path and the full-compliance path.

Sequencing for lease-up and lender milestones

Apartment schedules are driven by lease-up. A lender wants a certificate of occupancy on the first building before the interest reserve runs dry, and a leasing team wants units delivered in blocks, not all at the end. We plan for temporary certificates by floor or building, with the corridor, life safety and elevator work finished in the order that makes each block inspectable.

Boulder Junction shows how long housing can take on a larger site. Phase 1 of the redevelopment, west of the railroad tracks, brought transportation connections, affordable housing, a regional bus station and mixed uses, and Phase 2, east of the tracks, was held until Phase 1 was largely complete. When a multi-phase project is ahead of you, we help decide what infrastructure comes first and what can wait for the market.

The residential building types in our work

Our housing work spans garden-style apartments, townhome rows, four and five story wood-frame buildings over a podium, and mid-rise steel or concrete frames. We also build multifamily apartment projects with amenity decks, bike rooms and structured parking, and housing that targets specific residents, such as student housing near campus with a fall move-in date that cannot slip.

Superior's downtown shows another pattern, a partially complete mixed-use development where a 251-unit apartment complex and a hotel were reported under construction and expected to finish in 2027. That report comes from a single public source, so treat the date as approximate, but the pattern of housing next to a hotel and retail is one we know how to sequence on a shared site, and the Superior building context is something we track.

Work we manage most closely

On housing projects we schedule and supervise site concrete, foundations, flatwork and carpentry closely, and we place the work with trades we have worked with. Managing early work this way gives us control of the part of the schedule that is exposed to weather and subcontractor availability, and it gives you a clearer picture of the real cost earlier in the project.

When your project is sold to an operator or run by a management company, we coordinate turnover and the closeout package for them. Our colleagues in property management see the buildings after we leave, and what they tell us about maintenance access and warranty callbacks shapes how we detail the next one. We also work for developers building a mixed program for education institutions that need housing on or near a campus.

Walk the parcel with us

Tell us the unit count, the number of stories you are considering and the town. We will return the constraints we see, a concept budget and the permits that set your schedule.

Questions Owners Ask

Which construction type is cheapest for a four or five story apartment building?

Wood frame over a one-level concrete podium is usually the cost leader for four to five stories, with the podium holding parking or retail. Taller buildings or those with large clear spans move to steel or concrete, which cost more per square foot but may allow more units on a small site. We price the alternatives at concept stage so the decision rests on numbers.

How do utility and impact fees change the schedule?

They can add months if the water or sewer provider needs to approve capacity or extend a main. We request will-serve letters and confirm capacity during due diligence. Where an extension is needed, we sequence it ahead of vertical work, and we treat the agency's inspection windows as milestones on the schedule.

Can we start site work before the building permit is issued?

Sometimes. Many jurisdictions issue a grading or site permit while building plan review continues, which lets earthwork, utilities and foundations begin earlier. The permit has to be applied for separately, and the city may limit what can be done. We confirm with the building official before putting an early start on the schedule.

What does an all-electric requirement change in a multifamily building?

Space heating and water heating move to electric systems, often heat pumps, so electrical service is larger and the main room layout changes. Boulder's energy code requires all-electric or non-fossil design for new commercial projects, and whether a residential building falls under that rule depends on its code category, so we confirm with the building department. We coordinate with your engineer early to size the service and locate equipment rooms.

Do you build affordable and market-rate buildings the same way?

The building methods are the same, but financing adds requirements: prevailing wage in some cases, tax credit compliance, extra documentation and tight draw schedules. We set up our reporting to meet those lender and agency requirements. We also help the design team find savings that do not touch the long-term durability the owner needs.

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