The professionals who understand ADUs win the deals nobody else can.
Get certified, run instant ADU Ready™ Reports, and close deals before your market catches on.
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The Platform
What is TWODWELL?
TWODWELL is the all-in-one platform for ADU professionals.
From instant ADU Ready™ Reports and Lottie™ AI advising to a built-in Expert CRM, ADU financing, branded signage, and an expert community, TWODWELL gives you everything you need in one place. Get certified, win clients, and close more ADU deals, all under your own brand.
The TWODWELL Platform
Three steps to build your ADU business.
Step 1 · Get certified Earn the ADUExpert™ credential with one payment. You get the course, your certificate, and full platform access.
Step 2 · Access the tools Unlock instant ADU Ready™ Reports, Lottie™ AI advising, your Expert CRM, and built-in financing. Everything you need to run deals.
Step 3 · Build your business Turn ADU conversations into closed deals and grow your reputation as the certified expert in your market.
One online course.
Become the ADU expert.
Courses
Accessory Dwelling Units (ADUs) | Basics
ADU Eligibility & Feasibility | Site Characteristics
ADU Costs, Financing & Return on Investment (ROI)
Run an instant
ADU Ready™ Report.
Your certification unlocks the entire TWODWELL platform. Generate a branded report for any address, then advise clients with Lottie™ AI, a built-in Expert CRM, and instant financing. Everything you need to run deals, in one place.
Preparing your ADU Ready™ Report…
Win more listings,
close more deals.
Certified experts become the name homeowners search for. TWODWELL sends qualified leads straight to your phone. You run the report, advise with Lottie™ AI, and close before the competition even hears about it.
New ADU lead at 1420 Oak Ave. They just requested a report.
Deal closed. Sarah's ADU is fully funded. That's 4 this month.
What's ahead
Know the ADU business inside and out.
The six ADU types, the market driving the demand, and the financing that gets every project built.
Advise with confidence
Know every ADU type your clients will ask about.
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Most CommonDetached ADU
A fully separate structure built on the same lot, maximum privacy, flexibility, and rental income potential.
Sq. Footage400–1,200 sq ftBuild Timeline9–14 monthsRental Potential$1,800–$2,800/moTypical Cost$150K–$350K -
Most AffordableGarage Conversion
Transform an existing garage into a fully permitted living space, the fastest and most cost-effective ADU path.
Sq. Footage300–600 sq ftBuild Timeline4–8 monthsRental Potential$1,200–$2,000/moTypical Cost$80K–$150K -
Easiest to PermitJunior ADU (JADU)
Up to 500 sq ft carved from the existing primary home. Streamlined permitting, no new footprint required.
Sq. FootageUp to 500 sq ftBuild Timeline3–6 monthsRental Potential$800–$1,500/moTypical Cost$40K–$100K -
Highest AppreciationAttached ADU
An addition sharing at least one wall with the primary home, adds square footage and property value seamlessly.
Sq. Footage300–800 sq ftBuild Timeline8–12 monthsRental Potential$1,500–$2,400/moTypical Cost$120K–$280K -
Best Use of SpaceAbove-Garage ADU
Built above an existing or new garage, vertical space creates a private unit without consuming yard area.
Sq. Footage400–800 sq ftBuild Timeline8–12 monthsRental Potential$1,600–$2,500/moTypical Cost$130K–$250K -
Fastest BuildInterior Conversion
Convert a basement, attic, or bonus room into a permitted ADU, minimal exterior impact, maximum value.
Sq. Footage200–600 sq ftBuild Timeline2–5 monthsRental Potential$800–$1,800/moTypical Cost$50K–$120K
Detached ADU
Most Common
01 / 06
The platform's in-house lending arm matches every homeowner to the right loan through ADU Advantage™. It's there from the first ADU conversation to the day ground breaks.
Licensed & regulated
A licensed mortgage lender under NMLS# 238187. Equal Housing Opportunity, held to real lending standards.
Backed by ProMortgage
Decades of mortgage-lending expertise underwrite every ADU financing decision.
Real approvals, not referrals
Actual underwriting and funded loans in-house. Your client is never handed off to a stranger.
An early look, built in
Every ADU Ready™ Report gives you an early look at rates and eligibility. From there, a straightforward application with our team gets you the real numbers.
Four loan products
Coverage across the full ADU lifecycle with ADU Advantage™. New construction, purchase, buy-and-build, and bridge.
Direct lender access
No aggregators and no referral hand-offs. You stay the trusted advisor from first call to funded.
Why experts choose TWODWELL Financial
Fund every ADU deal
New construction, purchase, buy-and-build, and short-term bridge. ADU Advantage™ covers the whole lifecycle, so no project stalls for lack of capital.
Rates the moment you need them
Every ADU Ready™ Report surfaces an early snapshot of financing options, right when you need it. From there, explore real ADU Advantage™ rates and complete a straightforward application with our team.
You stay the trusted advisor
TWODWELL Financial works behind your brand. No referral hand-offs, no lost deals, just funded projects and clients who credit you.
Licensed lending, not lead-gen
TWODWELL Financial, powered by ProMortgage, is a licensed lender (NMLS# 238187). Real underwriting and real approvals, never a referral marketplace that hands your client to a stranger.
Your single best source for everything ADU.
Policy updates, market data, financing news, and pro insights, delivered weekly to ADU professionals.
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ADU Questions & Answers
The questions every ADU professional gets asked first.
ADU laws change fast and clients have real questions before they commit. These answers draw on current state law, state housing finance programs, and TWODWELL's platform, giving you the detail every ADUExpert™ professional needs to advise with confidence.
ADU Rules
Yes. Size limits, setbacks, owner-occupancy requirements, and impact fees are set at the state and local level, so they differ from one market to the next. Every ADU Ready™ Report is scoped to the exact address, so you always advise from that jurisdiction's current rules.
It depends on the state. Many states have removed owner-occupancy requirements for standard long-term ADU rentals, while some cities still require it for short-term or vacation rentals. The platform flags the rule that applies to each property.
Maximum ADU size is set by state and local rules and often ties to the size of the primary home or the lot. Detached, attached, and conversion ADUs can each carry different limits. The ADU Ready™ Report shows the maximum allowed size for the specific property.
It depends on the state. Some states void HOA restrictions that effectively ban a compliant ADU, while others let an HOA enforce its own CC&Rs on design and appearance. Where the HOA keeps that authority, a conflict between your permit and the CC&Rs is a private legal matter, not something the planning department resolves.
It depends on the jurisdiction. Many states and cities exempt smaller ADUs from impact or system development charges, and some tie the exemption to a size threshold or a short-term-rental restriction. The ADU Ready™ Report flags the fees that apply to each address.
Feasibility
An ADU Ready™ Report shows the ADU types allowed by zoning for that property, size and setback limits, estimated construction cost, projected rental income, and an estimated permit timeline.
ADUs generally take a few forms, including detached new construction, attached additions, garage or interior conversions, and above-garage units. Which types are allowed, and what they're called, depends on local zoning. The ADU Ready™ Report lists the types allowed for each specific property.
TWODWELL Platform
The ADU Ready™ Report is a TWODWELL-generated property intelligence document. Each report includes the ADU types allowed by zoning for that property, size and setback limits, estimated construction cost, projected rental income, and an estimated permit timeline.
ADUExpert™ is TWODWELL's professional certification for real estate agents, contractors, and ADU Allied Professionals. Certification is a one-time $495 fee that includes your credential, training, and platform access, the Lottie™ AI assistant, the Expert CRM, a directory listing, and the ADUExpert™ marketing kit. Running ADU Ready™ Reports then runs on a monthly plan, Core ($99/month, 10 reports) or Plus ($199/month, 25 reports).
TWODWELL matches each client to available financing based on their property and financial profile through ADU Advantage™, including construction loans, cash-out refinancing, HELOCs, and any state or local ADU programs they qualify for. Options appear directly within the ADU Ready™ Report flow.