Why ADU financing is different
Not every lender gets ADUs, the right one changes what you can build
Current value vs. future value
These determine whether a detached unit fits and how large it can be.
Keep your low first mortgage
Several options let you fund the ADU without refinancing the mortgage you already have, often the single biggest factor in the monthly math.
We make the introductions
We connect you with trusted lending partners who know ADU programs, draw schedules, and how appraisals treat a completed unit.
Our lender network
Lenders CT ADU can connect you with
CT ADU isn't a lender, but over years of Connecticut builds, our team has built relationships with financing sources that actually understand ADUs, renovation and modular, so you're not starting from a cold call.
Local banks
Relationship lending from institutions that know Connecticut property and the towns we build in.
Credit unions
Often competitive on home-equity products for members, with a community focus.
Private lenders
Flexible underwriting for cases that don't fit a conventional box, including some that lend on after-renovation value.
Two things homeowners are often surprised by: some of these lenders underwrite to your home's after-renovation value (ARV), and some of the second-mortgage lenders we work with allow a combined loan-to-value as high as 100% (most large banks cap around 80%) of your home's value for well-qualified borrowers. These programs are case-by-case and depend on the lender, the property, and your qualification, so we help you find the right fit rather than promise a number. Compare the structures in our HELOC vs home equity vs renovation loan guide.
Ways to fund your build
Six financing paths for a Connecticut ADU
There's no single "best" option, the right fit depends on your equity, mortgage rate, timeline, and how much you're building.
Flexible draws
HELOC
Borrow against the equity you already have and draw only what you need as the build progresses. Often the simplest starting point.
Best for
Significant equity and a current mortgage rate you’re willing to replace.
For larger builds
Construction / renovation loan
A structured loan sized to the completed project and released in draws tied to construction milestones.
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Best for
Significant equity and a current mortgage rate you’re willing to replace.
One payment
Cash-out refinance
Replace your current mortgage with a larger one and take the difference in cash, a single lump sum and one monthly payment.
Best for
Significant equity and a current mortgage rate you’re willing to replace.
Age 62+
Reverse mortgage
Convert home equity into funds with no required monthly payments, so you can add a unit and stay in your home.
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Best for
Homeowners 62 or older with substantial equity and a long-term plan.
Compare at a glance
Which path fits your situation?
A quick read on what each option is best for, and what to watch out for. None of these is a recommendation; the right fit depends on your equity, rate, and plans.
FINANCING PATH | BEST FOR | WATCH OUT |
|---|---|---|
HELOC | Flexible draws and strong current equity, a common starting point. | Usually a variable rate, and limited to your home's current value. |
Home equity loan | A fixed payment and a known budget from day one. | Less flexible than a line of credit during a staged build. |
Construction / renovation loan | Larger builds funded in draws tied to construction milestones. | More documentation, inspections, and process than a HELOC. |
Cash-out refinance | When replacing your first mortgage genuinely makes sense. | Unattractive if your current mortgage rate is low. |
Reverse mortgage | Homeowners 62+ with substantial equity and a long-term plan. | Estate, tax, insurance, and occupancy implications to review. |
Guide
HELOCs, renovation loans & second mortgages
The full breakdown, including how future-value lending works.
Explore
Will your ADU pay for itself?
Model cash flow, cap rate, and DSCR with a live ROI calculator.
Plan for it
House hacking with an ADU
Use rental income to help offset the cost of ownership.
