Accessory Dwelling Units (aka ADUs, granny flats, or backyard cottages) are having a major moment. Whether you want to boost your property value, score some passive rental income, or finally give your mother-in-law her own space, these tiny homes deliver massive benefits. But what exactly counts as an ADU—and is your backyard ready for one? Let’s break it down.

Independent Living Space: An ADU functions as a separate residence with its own kitchen, bathroom, and private entrance.

Secondary to a Primary Dwelling: It cannot stand alone and must share the same lot as the main home.

Compact Size: While sizes vary, most cities have a cap on square footage, typically 500 to 1,200 square feet.

 

1. Detached ADUs (The DADU)

Think backyard cottages, casitas, or standalone tiny homes. It's your own private island... just steps from the back porch.

 

The Good: Ultimate privacy and total design freedom.

 

The Bad: It’s a ground-up build, meaning a bigger hit to your wallet for foundations and utilities.

 

🔌 2. Attached ADUs

This is an addition or a new wing physically connected to your main house.

 

The Good: Shared walls mean shared infrastructure—saving you some serious construction cash.

 

The Bad: You’ll probably hear your tenant (or your teenager) through the wall. Privacy is a bit compromised.

 

🚗 3. Garage Conversions

The ultimate recycling project. You take your existing garage and flip it into a chic livable space.

 

The Good: The bones are already there! It’s fast, efficient, and budget-friendly.

 

The Bad: Say goodbye to covered parking, and hello to a strict square-footage limit.

 

🪵 4. Interior ADUs (Basements & Attics)

Carving out an apartment entirely within your current home’s footprint.

 

The Good: Super cost-effective since you aren't adding to the house. Plus, it makes great use of forgotten space.

 

The Bad: Heavy remodeling ahead. You might need to raise ceilings, add separate entrances, and figure out soundproofing.

 

1. The Ultimate Side Hustle

Rent it out to long-term tenants or weekend travelers. It's a steady stream of passive income that can help destroy your mortgage.

📈 2. Serious Property Flex

Adding a chic mini-home to your lot instantly boosts your home’s resale value and catches the eye of future buyers.

🔑 3. Proximity + Privacy

Keep your adult kids or aging parents close by. An ADU gives everyone the independence they want with the support they need.

🌆 4. Fighting the Housing Crunch

ADUs provide much-needed, affordable housing options in crowded cities without ruining the neighborhood vibe.

🌱 5. Tiny Footprint, Big Savings

Smaller spaces require way less energy to heat and cool. It’s an easy win for your carbon footprint and your monthly utility bills.