New Hampshire’s Take on ADUs: Freedom with Forethought

Accessory Dwelling Units (ADUs) are gaining momentum across New Hampshire as homeowners look for flexible, affordable solutions that add value to their properties. Whether it's space for family, passive income from a long-term rental, or a private retreat for guests, ADUs offer a practical way to meet changing needs—without sacrificing location.

At JFA Design Group, we bring clarity and creativity to the ADU design process, turning your vision into a beautifully crafted living space that enhances your property and your lifestyle.

📘 1. Understanding New Hampshire ADU Law

Since 2017, New Hampshire has required municipalities to allow ADUs by right (or special exception) on any single-family lot. While that opens doors for many homeowners, each town still sets specific rules—such as unit size, parking, and whether attached or detached ADUs are permitted.

We begin every project by researching your town’s ordinances and helping you understand your options clearly.

🧾 2. Permits and Approvals

Navigating town approvals in New Hampshire may involve planning boards, zoning officials, and building inspectors. We work closely with local officials to ensure your project meets all permitting requirements and moves forward without unnecessary delays.

📐 3. Design That Fits—Beautifully

JFA Design Group specializes in designing ADUs that don’t just “fit”—they elevate. Whether attached or detached, above a garage or within a basement conversion, our designs are tailored to blend with your main home and reflect your style.
While NH towns often cap ADUs at 750–1,000 square feet, we know how to make every square foot functional, open, and welcoming.

💧 4. Water, Septic & Systems

Rural areas may require special attention to well and septic capacity. Some towns require a certified septic evaluation before ADU approval. We’ll help coordinate with licensed professionals to ensure your systems support the added use—while also identifying opportunities for efficiency.

💰 5. Budget and Construction Planning

Building an ADU is a significant investment, but one that can pay dividends for years to come. We work with you to create a realistic budget, recommend vetted local contractors, and provide construction-ready plans that make the build process seamless.

🌲 6. Privacy, Nature, and Future Flexibility

Many New Hampshire homeowners value peace and privacy. Our ADU designs emphasize that—offering options like separate entrances, soundproofing, and views of natural surroundings. Whether for aging in place, rental income, or multigenerational living, your ADU can grow with your needs.

Your Next Step
JFA Design Group is committed to making your ADU journey smooth, inspired, and deeply personal. We’re here to help you understand the rules, explore your options, and create a space that adds beauty and function to your life.



Let’s get started on your New Hampshire ADU—built smart, built beautifully.
Contact us to schedule your design consultation.