Cape Cod Bank's ADU Financing Program

By Buz Artiano, BuildX | October 2025

Choosing the right financing for your ADU project is a very important and impactful decision. It can mean the difference between saving tens of thousands of dollars or paying a ton of unnecessary interest over time. Most people assume all lenders offer similar loans, but that's not really the case at all.

At BuildX, we've helped dozens of Massachusetts homeowners figure out their ADU financing, and there's a pattern. Local banks are almost always better than bigger national lenders when it comes to HELOCs and construction loans. We work directly with Cape Cod Bank, Salem Five, and a few other local banks because we've seen how much money our clients save by doing it this way.

Why Do Local Banks Offer Better ADU Financing Terms?

Local Massachusetts banks have an advantage that helps you save real money when building your ADU. They service their own loans and they want a full banking relationship with you, not just a single transaction.

The rate differences between local and national lenders comes from the way they operate. National mortgage companies usually sell loans to secondary lenders, which requires them to charge rates above prime. Local banks hold their own paper, which lets them offer less than prime rates while building long-term relationships with their customers.

How Does Relationship Banking Benefit My ADU Project?

Local banks understand Massachusetts ADU requirements in the state a lot better than national lenders do. Their loan officers know the local market, understand property values in your specific town, and they make their own decisions without having to answer to corporate higher ups.

Starting a relationship with your local bank 6 to 12 months before your ADU project starts is one of the best things you can do. You can open a checking account, move deposits, and meet with a loan officer. This builds a good foundation with the bank that makes approvals more likely and can even secure better terms when you're ready to pull the trigger.

What Loan-to-Value Can I Get for My ADU?

Most big banks cap HELOCs at 80% loan-to-value. But there are some local banks who offer construction HELOCs that can get you to approximately 90% for ADU projects. Having that extra equity can be the difference between a fully funded project and needing to find alternative financing as well.

If your current mortgage already has you near 80% LTV, a construction HELOC through a local bank could give you the flexibility you need to complete your ADU without having to do a cash-out refinance that could cause you to lose the low rate you currently have.

Why Is a HELOC the Preferred ADU Financing Method?

For people who already have a low-rate mortgage, a cash-out refinance should be the last resort. Using your home's equity through a HELOC preserves your current low rate while still giving you the funds you need.

The advantage of a HELOC for ADU projects: you only pay interest on funds as you draw them. That means you only have to pay interest on the money that has been used, and not the whole approved amount.

When Might a Local Bank Not Be the Right Choice?

Local banks are not always the best way to go for every situation. If you need to borrow above 90% LTV, you will likely have to look into special types of construction loans through mortgage companies that provide options that local banks just can't offer. Some people who have complicated financial situations, such as self-employment income or multiple properties, may be better off going through a big national lender who have more options and flexibility.

Additionally, if you're looking for a completely turnkey "ADU financing program" where you only have to deal with one bank, that's usually something that national lenders can do, but keep in mind they usually have higher rates and more oversight requirements.

How Do I Start Building My Financing Team?

Successful ADU financing requires treating it kind of like a team sport. We recommend assembling a team of the following people:

• A mortgage banker familiar with ADU projects
• An attorney for title and closing
• An elder-law specialist if the ADU involves aging-in-place planning
• A builder experienced with Massachusetts ADU requirements

These decisions will affect your project for many years. Your financing plan affects not only the upfront construction costs but the payments you will have to make for years and years.

Ready to Explore Local Financing Options?

BuildX works directly with Cape Cod Bank, Salem Five, and other Massachusetts lenders who understand ADU projects. We can connect you with loan officers we know who have closed on hundreds of ADU financing packages and know exactly what documents and methods work best.