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Understanding ADUs: The What, How, and Financing Options of Accessory Dwelling Units

In recent years, Accessory Dwelling Units (ADUs) have gained significant attention as a solution to housing challenges in many urban and suburban areas. This blog post will explore what ADUs are, their legal status, benefits, and financing options for building one.

What is an ADU?

An Accessory Dwelling Unit, or ADU, is a secondary housing unit on a single-family residential lot. These self-contained living spaces can take various forms, including:

  • Converted garages or basements
    Attached additions to existing homes
    Standalone structures (often called “granny flats” or “backyard cottages”)

ADUs typically include their own entrance, kitchen, bathroom, and living area, providing a complete and independent living space.

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State Laws and ADUs

The legal landscape for ADUs varies significantly across the United States. In recent years, many states have passed laws to encourage ADU construction as a means to address housing shortages. For example:

  • California has enacted statewide legislation that requires local governments to approve ADUs that meet certain criteria.
  • Oregon passed a law requiring cities with populations over 2,500 to allow ADUs in most single-family zones.
  • Washington state has taken steps to reduce barriers to ADU construction.

However, regulations can differ greatly between states and even between municipalities within states. It’s crucial to check your local zoning laws and building codes before planning an ADU.

Benefits of ADUs

ADUs offer numerous advantages for homeowners, communities, and cities:

  1. Increased housing supply: ADUs provide more housing options in existing neighborhoods without significant changes to community character.
  2. Affordable housing: These units often rent at lower rates than typical apartments, offering more affordable options in high-cost areas.
  3. Multigenerational living: ADUs can accommodate aging parents or adult children, allowing families to stay close while maintaining privacy.
  4. Income potential: Homeowners can generate additional income by renting out their ADU.
  5. Increased property value: An ADU can significantly boost a property’s overall value.
  6. Environmental benefits: By utilizing existing infrastructure and promoting urban density, ADUs can help reduce sprawl and associated environmental impacts.

Finding and Finalizing a Contractor

Building an ADU is a significant project that requires careful planning and execution. Here are some steps to find and work with a contractor:

  1. Research: Look for contractors with experience in ADU construction. Ask for referrals from friends or use online resources to find reputable professionals.
  2. Get multiple bids: Obtain detailed quotes from at least three contractors to compare costs and approaches.
  3. Check credentials: Verify licenses, insurance, and references for any contractor you’re considering.
  4. Clear communication: Ensure that your vision, budget, and timeline are clearly understood by the contractor.
  5. Detailed contract: Have a comprehensive written agreement that outlines all aspects of the project, including materials, costs, timeline, and payment schedule.
  6. Permits: Work with your contractor to obtain all necessary permits and ensure compliance with local regulations.

ADU Financing Options

Funding an ADU project can be challenging, but several options are available:

  • Home equity loans or lines of credit (HELOC): These allow you to borrow against the equity in your home.
  • Cash-out refinance: Refinance your mortgage for more than you owe and use the difference for ADU construction.
  • Personal savings: If possible, using savings can help avoid additional debt.
  • Government programs: Some localities offer grants or low-interest loans for ADU construction, especially if the unit will be used for affordable housing.
  • ADU-specific HELOCs: InstaMortgage offers a home equity line of credit program tailored for ADU projects. Here is how it is different from traditional HELOCs.

Traditional HELOC Calculator

  • Pre-Renovation Home Value: $500K
  • After-Renovation Home Value: $700K
  • Mortgage Balance: $300K
  • Available Equity: $100K (Typically, HELOCs are available up to 80% of the current home value minus mortgage balance)
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InstaMortgage ADU Financing Calculator

  • Pre-Renovation Home Value: $500K
  • After-Renovation Home Value: $700K
  • Mortgage Balance: $300K
  • Available Equity: $330K (up to 90% of the after-renovation value is used)

In conclusion, ADUs represent a flexible and increasingly popular housing solution. While they offer numerous benefits, building an ADU requires careful planning, from navigating local laws to securing financing and working with contractors. As housing needs evolve, ADUs are likely to play an increasingly important role in our communities.

We at InstaMortgage are experts at ADU financing. We are here to discuss all the ADU financing options available and guide you to what would work best for your scenario.

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