When building an Accessory Dwelling Unit (ADU) in the SF Bay Area (or California in general), homeowners often make the following four biggest mistakes:
1. Ignoring Local Zoning and Building Regulations
Why It's a Mistake: California has state laws that make it easier to build ADUs, but local jurisdictions can have additional requirements or restrictions. Homeowners sometimes overlook these, leading to costly delays or legal issues.
Example: A homeowner might begin construction without realizing that their local city has specific setback requirements or height restrictions, resulting in a stop-work order or the need to redo parts of the build.
Follow this link to the California ADU Handbook for additional information and reach out to your local city planners and build departments for local ordinance questions.
2. Underestimating the Total Costs
Why It's a Mistake: Many homeowners underestimate the total costs involved, not just for construction but also for permits, utility connections, and unforeseen expenses like soil issues or the need for upgraded infrastructure.
Example: A homeowner might budget for the construction costs but forget to account for expensive utility connections or impact fees, leading to budget overruns. Additionally, the requirements for solar panels and/or fire sprinklers can be added on by city planners fulfilling their local ordinances as well.
If you are looking for a rough ballpark of the cost to build, reach out to me at 650.451.8763 and happy to provide you information and advice.
3. Not Planning for Long-Term Use
Why It's a Mistake: Homeowners sometimes build an ADU without a clear plan for its long-term use, whether for rental income, housing family members, or as a future home office. Without this foresight, the ADU may not serve its intended purpose or might require costly modifications later.
Example: A homeowner might build an ADU for immediate rental income but later realize it doesn't meet their needs for aging parents, requiring expensive renovations to make it more accessible.
4. Failing to Understand the Layout of the Lot and Access to Services
Why It's a Mistake: Not fully understanding the layout of the lot and the access to essential services like electrical, plumbing, and sewer can lead to expensive changes in the design phase or during construction. This can include needing to relocate the ADU, upgrade services, or modify plans to accommodate existing infrastructure.
Example: A homeowner might design an ADU assuming easy access to plumbing, only to discover that the sewer line is on the opposite side of the lot, requiring costly trenching and additional permits. Similarly, inadequate planning for electrical service upgrades can lead to unexpected expenses and delays.
Check out this website to help you physically map out and sketch the location of an ADU that you can use to take to your local city planners.
Summary of Biggest Mistakes When Building an ADU
By being aware of these potential pitfalls, homeowners can better prepare for a successful ADU project that meets their needs and budget.
If you are searching for contractors, we have vetted partners who have expertise, guidance, and competitive pricing for our clients and friends.
Have questions? Feel free to text me at 650.451.8763 and happy to help.
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