D.R. Horton Signs Robotics Deal for 1,250 Homes in Phoenix

D.R. Horton, the largest U.S. homebuilder by volume, has signed a multi-year agreement to build more than 1,250 homes using robotic factory capacity from startup Promise Robotics. The deal, announced October 13, makes D.R. Horton the first major U.S. builder to adopt Promise Robotics' Factory-as-a-Service model.

The scale is deliberately modest. D.R. Horton closed 84,863 homes in fiscal 2025, so 1,250 robot-built homes equal roughly 1.5% of a single year's volume. This reads as a measured test, not a wholesale shift in how the builder constructs homes.

Phoenix changes the math. Promise Robotics told ResiClub all 1,250 homes will be built in metro Phoenix, where that figure represents more than half a year of D.R. Horton's recent combined annual closings across Maricopa, Pinal and Pima counties. The deal structure also breaks with convention: D.R. Horton isn't buying robots or building a factory. It's renting automated capacity from a third party that owns the plants, software and robotics, starting with a factory in Gilbert, Arizona.

What does the deal include?

The companies didn't disclose financial terms, a delivery timeline or which Phoenix communities will receive the homes. Brad Conlon, D.R. Horton's senior vice president of strategic growth and innovation, framed the deal around three operating goals: faster cycle times, more production capacity, and more consistency and predictability. He called Promise Robotics' platform a new capability for pursuing those goals.

How does Factory-as-a-Service work?

Promise Robotics' pitch is simple: builders shouldn't have to own a factory to get factory-style production. Promise Robotics owns and runs the plants, robotics and software; builders buy output. The workflow runs in four steps:

• Design translation: AI ingests a builder's existing home plans, so no redesign is needed.
• Production planning: Software generates production plans and machine instructions for the robots.
• Robotic manufacturing: Off-the-shelf industrial robots produce building components on the factory line.
• Site installation: Promise Robotics coordinates delivery and installation on the jobsite.

On a typical jobsite, framing crews cut studs, nail walls together and stand them up by hand — labor-intensive, weather-dependent work where builders feel labor shortages most. Promise Robotics moves that framing into a factory, where robots assemble wall panels from the builder's plans; the panels are trucked to site and set in place, faster than framing from scratch. The company says its differentiator is integration: it ties design, factory and jobsite into one production system rather than automating a single task like nailing or cutting. The D.R. Horton announcement doesn't specify which components are in scope, though earlier coverage describes its output as framing components such as wall panels.

Why rent instead of build?

Offsite construction has a long history of failed factory bets. Builders and startups have sunk capital into plants that sat underutilized when local demand cooled. Promise Robotics CEO Ramtin Attar made that point in 2023, when the company raised a $15 million Series A: builders are reluctant to invest in costly factories and then spend years on trial and error.

Speaking to ResiClub, Attar laid out the company's path from Canadian pilot to U.S. scale:

"Promise is building the production infrastructure homebuilding scales on. Builders are increasingly looking to secure industrial production capacity through multi-year commitments because they need to deliver more homes with faster, more predictable cycle times. But building and operationalizing that capacity takes significant capital, time and expertise. Our platform removes those barriers: it turns a builder's designs into production instructions, orchestrates production, and gets better with every build. We proved the model in Edmonton and scaled it in Calgary, where we've been in continuous production since September 2025. Now we're replicating that model in Phoenix, creating the template for every market that follows."

The Canadian track record is short. Promise Robotics — founded by Attar, a former Autodesk R&D executive, and Canadian homebuilder Reza Nasseri — ran its first production line in Edmonton, then opened a 60,000-square-foot plant in a Calgary warehouse, backed in part by a federal contribution from Prairies Economic Development Canada. Calgary's anchor customer is Mattamy Homes' Alberta division, which signed its own multi-year agreement to supply single-family, semi-detached and multi-family homes in two master-planned communities.

Why now?

Margin pressure sharpens the appeal. Among the 15 largest homebuilders tracked by ResiClub, 13 are seeing year-over-year gross margin compression. Any tool that shaves weeks or labor hours off a build is worth testing in that environment. The asset-light structure limits downside: D.R. Horton takes no factory onto its balance sheet and can fall back on existing trade partners if the plants miss schedule or cost targets. Promise Robotics carries the capital risk; D.R. Horton carries execution risk on 1,250 homes.

Phoenix is the real test. It's Promise Robotics' first U.S. production market — a different labor pool, supply chain and building code environment, where builders have their own trade bases and framing crews. Two multi-year capacity deals, Mattamy and D.R. Horton, are early evidence for Attar's claim of a broader shift. They aren't yet a trend.