Real Estate and Construction Startups funded by Y Combinator (YC) in the San Francisco Bay Area 2026

We use AI agents to manage short-term rental properties by running operations completely autonomously. We cut traditional human management fees in half so owners take home 20% to 30% more revenue. And we operate with near-zero boots-on-the-ground so we can scale nationwide with software margins and at venture speed in a traditionally physical industry.

We build centimeter-accurate 3D maps of underground utilities to help construction contractors dig safer and faster. With underground intelligence, contractors can avoid dangerous utility strikes and costly project delays.

Alloovium is the document intelligence layer for construction 🏗️ It reads every document and piece of data on a project (contracts, specs, drawings, compliance records, conversations), turning them into answers you can trust and actions with real value: every answer cites its exact source sentence, paperwork is checked clause by clause against the builder's own Integrated Management System, and nothing AI-drafted moves without a human sign-off, with it all compliant by default.

Vestris automates title processing end-to-end, from contract to close, so title shops can close more deals with fewer processors. Title insurance has famously high margins, but slow, manual processing is a constant pain — especially in today's bleeding housing market.

FlowManual is the all-in-one AI estimating, bidding, and purchasing platform for both general and MEP construction contractors. Built by two engineers and Harvard dropouts, FlowManual automates the buying process during pre-construction. With FlowManual, specialty contractors win more work while general contractors deliver at higher standards.

RealPact builds AI agents that handle the paperwork behind real estate transactions. They find property records like deeds, tax records, permits, parcel data, and MLS information, then use that data to fill out contracts, organize documents, track deadlines, and help brokerages close deals faster. We are starting by automating transactions and will expand into other parts of brokerage operations. Much of the software used across the real estate industry is outdated. With today’s advances in AI, we can build agents that handle this operational work and create modern software around how brokerages actually work. We currently sell to brokerages in New Hampshire and are expanding quickly.

Home services companies lose money on missed calls and idle techs. When the phone rings during a job and nobody picks up, that lead goes to a competitor and the trucks already on the road sit half-booked because dispatch can't keep the schedule tight. CentralComs fixes this with AI agents that answer every call, route each job to the right technician, and keep the calendar full. They handle intake, dispatch, and customer updates end to end working inside ServiceTitan, Housecall Pro, and Jobber so no lead slips through and no truck runs empty. Capture every call. Book every tech. Never miss a job.

AquaShield protects large real estate portfolios against water damage (losses of up to hundreds of millions per year).

Rudus is an AI-powered takeoff and estimation platform enabling concrete contractors to win 3x more projects yearly. It automatically identifies every concrete structure like footings, walls, columns, and slabs on plans, eliminating the manual work and reducing estimation time by 70%. Concrete is the most-used material on earth after water, and demand is surging with the AI infrastructure boom.

Foreman is the all-in-one AI-powered project management platform built for construction contractors and the trade industry. Today, contractors run complex businesses on a patchwork of tools that were never designed for construction — estimates in spreadsheets, plans in email, proposals copy-pasted from old Word docs, photos scattered across phones. Nothing talks to anything else, and the admin work never stops. Foreman replaces that patchwork with a single platform that manages the full lifecycle of a construction job, from first estimate to final invoice. Contractors upload plans, photos, or a project description, and Foreman's AI instantly generates structured takeoffs, scoped estimates, and professional proposals — in minutes, not hours. From there, every customer record, document, permit, photo, change order, and conversation lives in one place, organized around the job. The result: contractors spend less time buried in admin and more time building. They bid faster, manage jobs with less chaos, and close projects cleanly — without duct-taping five tools together to do it.

Travo is an AI-native commercial real estate brokerage. Our AI constantly sources off-market deals that fit your exact buy box, and our brokers take them to close. Instead of the same on-market listings everyone sees, buyers get properties that never hit the market, with reconciled T-12s, rent rolls, and comps already cleaned up and ready to underwrite. We focus on multifamily, manufactured housing (MHP and MHC), and RV parks and resorts.

Automax.ai does property appraisals faster and more transparent. Our mobile app uses LiDAR and computer vision to capture property details automatically, and our custom-trained AI agents combine that data with all the analysis and aggregation required to to generate a complete appraisal report in minutes. The result is a clear, grounded valuation, fully Fannie Mae & Freddie Mac compliant — done in under 20 minutes from start to finish.

We help construction teams eliminate rework, delays, and drawing confusion before construction starts.
We analyze PDF plans, detect clashes and inconsistencies across disciplines, and create draft RFIs so teams can resolve issues early. This saves construction companies hundreds of hours and millions of dollars. What we do: - Automatically detect clashes, missing information, and drawing mismatches - Align architectural, structural, and MEP plans so everything matches across sheets - Generate draft RFIs from issues we find - Replace long page-turn meetings with instant drawing analysis - Reduce rework and prevent schedule delays before boots hit the ground We integrate with:
Procore, Autodesk, email, and the tools teams already use Teams use us to: - Save hundreds of thousands to millions of dollars per project - Catch design and coordination issues early - Reduce RFIs and prevent field fixes - Keep projects on schedule with fewer surprises Contact us at founders@helonic.com

We are a full-service sell-side residential brokerage that lists and markets your properties. We also screen and schedule tenants showings with our AI agent for a third of the normal commission.

Wayline is an AI front desk assistant purpose-built for real estate to answer calls and messages 24/7. It’s like an always-on property manager that can convert leads and resolve issues better than any human, day or night. Our AI can be setup in as little as 24 hours and works seamlessly with existing phone/management software. Uniquely, our AI knowledge base is domain-specific to learn and handle the most complex real estate workflows. For property operators, Wayline instantly replaces robo-menus and call centers, while centralizing and scaling back-office teams.

Bild AI automates Division 8 estimating — doors, frames, and hardware — end to end. Bild AI reads blueprints and specs, generates opening (door) schedules automatically, prices the bid, and exports it directly into the ERPs Division 8 shops already run on, including Comsense, Avaware, and ProTech. Division 8 estimating is the brutal trifecta of nitty-gritty details, where typos cost hundreds of thousands, and timelines are tight. Thousands of pages of specs, hardware sets cross-referenced by hand, and a single missed opening that can sink a bid's margin. Bild AI collapses days of takeoff into hours, and clients have bid 50% more with smaller estimating teams. Backed by Khosla Ventures (YC W25).

ArchiLabs is building the data center project OS.

We are building workflows to help developers go from finding and closing development sites to getting a building permit faster. PermitPortal accelerates the most critical parts of the pre-construction phase: finding the right sites, understanding entitlements and navigating local development sentiment.

Karmen is an AI scheduling assistant for construction. Karmen builds your baseline schedules from project documents, and updates them as your project evolves, saving you time and potential delays.

Fresco is an AI-powered takeoff and estimating for Division 8 construction (doors, frames, and hardware). Estimating Division 8 has always been brutally manual: flipping through hundreds of pages of specs, cross-referencing hardware sets, and building out schedules by hand. A single missed door or misread hardware group can kill a bid's margin. Fresco automates the entire takeoff process with 99% accuracy, cutting the time estimators spend on takeoffs by 70%. We've processed 3,000+ takeoffs for general contractors and Division 8 subs, and we're becoming the system of record for how this trade gets estimated. Division 8 is our beachhead: it's complex enough that AI creates massive value, and siloed enough that the incumbents haven't solved it. We're starting here and expanding across the spec trades.

Propaya is an AI-powered commercial real estate intelligence platform that transforms leases and property documents into structured, actionable data. It extracts key terms, obligations, costs, and critical dates with source citations, while identifying legal, operational, environmental, and biological property-risk signals. Teams can customize risk taxonomies, track portfolio-level issues, export structured data, and route flagged findings to property managers, legal teams, or domain specialists for review.

Assembly is an AI-native HOA management company on a mission to fix homeowner associations. Traditional HOA management is often reactive, confusing, and inefficient. Assembly takes a different approach by combining professional expertise with intelligent software to make communities run smoothly and decisions easier. We exist to build trust, create transparency, and ensure well-run communities that protect and enhance property values. Assembly simplifies day-to-day operations, automates routine tasks, and delivers the right knowledge at the right time. Our platform gives boards and homeowners clarity to make smarter, more confident decisions. We manage HOAs in San Francisco Bay Area and Greater Los Angeles.

An AI agent that catches issues in construction drawings before they become costly rework and project delays

Make data-driven decisions. Optimize property management. With the property Digital Twin from sizeless, you can access highly accurate data to understand your property's details, make informed decisions on inspections, and work on the required management optimization measures.

PropRise is the AI platform for institutional CRE investment teams. We automate the tedious, Excel-heavy workflows that slow down dealmaking: from sourcing to underwriting to due diligence. Our two live products serve 50+ customers including Public Storage: Beacon automates site selection for developers, and Primer extracts financial data from deal packages into structured, model-ready formats, cutting hours of analyst work to minutes. We're expanding across asset classes to become the operating system for CRE dealmaking.

Electric Air is a tech-enabled contractor for heat pump installations that cuts costs by 60%. Heat pumps are the most efficient way to heat American homes with a $53B annual market opportunity.

Cambio is the AI-native commercial real estate operations platform, built by investors for investors. Our suite of products automatically collects building data to empower mission critical workflows like capital planning and compliance. Cambio uses LLMs and agentic AI to reason across thousands of pages of unstructured data, run multi-stepanalyses, and continuously adapt as regulations, assets and market conditions change. With Cambio, investors can evaluate and prioritize retrofit investment opportunities across thousands of buildings at once, compressing months of work into minutes. We're working with the largest commercial real estate private equity firms globally like Principal Real Estate, Nuveen Real Estate, BGO, LaSalle Investment Management, Oxford Properties Group, Madison International Realty and Beacon Capital Partners. Our founding team collectively has two decades of commercial real estate experience across KKR, Oxford Properties Group, JPMorgan and Goldman Sachs. We are building the solution we wished we had while working at these funds.

Trusty is an agent-to-agent matchmaking network that searches every home, regardless of whether it's on the market. This means fresh inventory for buyers, private offers for homeowners, and happy real estate agents.

Culdesac designs, builds, and manages walkable communities. Culdesac is a real estate developer and property manager. We build neighborhoods that embrace community, open space, and mobility. We offer residential units at a variety of price points integrated with local retail, commercial uses, and open space for nature and public plazas. Our communities prioritize biking, walking, and transit over cars and parking. We partner with leading mobility companies to deliver convenient and affordable transportation services. This creates a vibrant urban lifestyle without the need for a private vehicle. Read more here > https://medium.com/culdesac/introducing-culdesac-3fbfe7c4219c

Handle builds software that helps simplify construction financial management by automating manual and repetitive tasks throughout the life cycle of construction payments.

Aecore is a technology-enabled commercial contractor focused on vertical integration and agile project delivery through automation. Our in-house design team, project managers and software engineers guide clients through the process from conceptual design to completion. We will ensure you are getting the best possible pricing by leveraging our network of contractors and material suppliers.

VergeSense is a Y Combinator-backed startup that develops an AI-powered sensing device for facility management. The sensor-as-a-system platform consists of sensing devices containing a series of different sensor hardware, including an image sensor, coupled with a cloud platform for pre-training machine learning models that run on the hardware, process data and report occupancy analysis back to VergeSense’s cloud.

TigerEye eliminates bullsh*t so construction professionals can focus on building the infrastructure that makes our world work

Homeroom helps investors provide affordable housing while making a 22% ROI. We do this by sourcing properties, arranging capital, managing construction, vetting tenants and collecting rent by the room. To date, Homeroom has brought on 85 property investors, growing 6X annually, are bringing in 420K in annualized net-revenue How it works: We help investors buy homes in cities that are attractive to young people, but lack affordable housing options. We then renovate and after about 20 days, the home is ready and we find qualified renters by the room. We launched in 2018 in Kansas City with 1 home. We now have 105 homes in 31 cities. In 2021, we grew rental GMV to $1.8M (300% YoY growth). Our average rent across every property is $458, which is about 50% lower than market comps, and our investors see returns up to 50% higher. We are HomeRoom. Johnny is the financial analyst/domain expert. Thomas is a cereal entrepreneur with a PHD in ML, and Mike hacked growth for Airbnb and Facebook.

What used to be an integral part of the American Dream, or at least a check mark on the way to adulthood, is now well beyond reach for many of us. And nobody bears the brunt of the current housing crisis more than young folks, who, compared to their parents and grandparents, find themselves saddled with more debt and in possession of fewer assets. But it doesn't have to be this way. At ZeroDown, we're driven by the radical idea that professionals with steady jobs and healthy finances should be able to afford homes - even in San Francisco. That's why we've come up with an alternative to the rent-or-own dilemma, offering the benefits of homeownership with the flexibility of renting. Here's how it works: 1. ZeroDown buys your home Choose any home on the market. We'll make an all cash offer on your behalf. 2. Build towards ownership A portion of your payment goes toward building ownership in your home. 3.You control when you buy Put the purchase-credits that you've built up towards buying your home from ZeroDown.

Every year $1.2 trillion in residential home sales are exchanged, however buying and selling a house is still a huge, painful process. Maybe that’s because Real Estate is the least digital industry, behind only agriculture 🐮 . Disclosures.io is on a mission to make the real estate process more transparent and efficient for everyone involved. Our product helps sellers get their home to market faster and enables buyers to make more informed offers. We believe in lean, pragmatic product development, entrepreneurship and building a business that we are proud to be a part of. We love talking to like-minded makers, drop us a line!

Starcity was one of the largest co-living brands. Exit to Common in 2021.

Tenant Turner helps property managers eliminate vacancy. We streamline your rental process from leads to lease by listing your rentals on all the major rental sites; pre-qualifying prospects via web, phone, and email; and schedule showings with a leasing agent, lockbox, or lock.

Movity provides location-based living facilities and neighborhood data that help home buyers make better decisions. Movity.com surfaces geodata (crime, noise, pricing, etc) to help home buyers make better decisions. The company was founded in 2010 and is based in San Francisco, California.

PadMapper is a location-based apartment rental search engine with real-time filtering. PadMapper's entire browsing interface is taken up by a full-screen map, and listings are loaded as the user moves around the map. Zooming into the map loads more listings in that area, zooming out broadens the search. Listings are filtered out or allowed back into the results as filter sliders are moved. Apartment listings from hundreds of sites are included, including Craigslist, Apartments.com, ForRent.com, and Oodle.

MyVR provides short-term rental businesses the ability to simplify and centralize the management of their marketing channels - Airbnb, HomeAway/Vrbo, TripAdvisor, Booking.com, Expedia and more - from a single dashboard, while also providing these businesses with their own online presence to grow their direct sales channel. MyVR's easy-to-use software also allows short-term rentals to streamline and automate day to day tasks, saving time and money, reducing errors, and improving the experience of travelers. MyVR's open platform also connects the MyVR core software seamlessly to other best of breed applications and services.

PlanGrid is the leader in construction productivity software, used on more than one million projects in 84 countries. PlanGrid's cloud-based platform empowers contractors and owners in commercial, heavy civil, and other industries to collaborate easily from their mobile devices and desktop, managing blueprints, specs, photos, RFIs, field reports, and punch lists. With over 100 million digital blueprints on its platform, PlanGrid is also the largest digital blueprint repository in the world. Founded in 2011, the company was part of Y Combinator in 2012, and has secured over $69 million in funding from Sequoia Capital, Tenaya Capital and several other top firms.

*Acquired by Knotel in 2018 42Floors was founded in November of 2011 with the vision of making it easy to discover and create your dream office space. Based in San Francisco, the 42Floors team is made up of experienced entrepreneurs, engineers, and real estate professionals. All with a passion for making the commercial real estate search process easier for everyone. On the site, you'll find available spaces, complete with high quality photography and all the data you need to make a decision. The site 100% free to use. 42Floors is currently in every major market in the United States, and we are still growing. We're always here to serve you.