How JLM Designs Helps Homeowners Dream Big—From Small Remodels to Backyard ADUs
Interview by Heather Anderson
Jackie Mendez has always seen what others can’t. Raised on job sites as the daughter of a general contractor, Jackie thought everyone could visualize walls that hadn’t yet been built. Today, she leads JLM Designs, a boutique interior design and drafting firm based in Northern California, where she helps clients bring ambitious projects to life. From kitchen makeovers to custom ADUs, Jackie combines space planning, permitting know-how, and interior architecture expertise into a seamless, high-touch experience.
In this conversation, Jackie breaks down the ins and outs of ADUs, what homeowners should know about permits and budgets, and why her approach makes the whole process less stressful—and a lot more beautiful.
You grew up on job sites with your dad. Was there a moment you realized you saw spaces differently than others?
Not one exact moment—it was just always part of my life. My dad would talk through his building plans out loud, and I could instantly visualize what he meant, even when there were just open studs. It wasn’t until later that I realized not everyone could see what we saw. My husband jokes that we have our own language when it comes to visualizing space.
“When you have the right people on your team, the process feels a lot less overwhelming.”
What was the first project that made you feel like, “This is what I’m meant to do”?
It was a tear-down in Napa. I drafted a full set of plans for a new farmhouse, and seeing those plans come to life was surreal. I walked into the finished space and thought, "This came out of my head." That’s when it all clicked—this is what brings me joy.
Your work blends drafting, interior design, and elements of architecture. Why this mix?
Drafters often don’t think about how people use a space, while interior designers are trained specifically for that. I love the technical side—planning corners, finishes, details that make the space both beautiful and functional. I also think like an architect when it comes to whole-house planning, but my training is grounded in how people live.
What kinds of projects do you take on?
Everything from kitchen and bathroom remodels to full home rebuilds, additions, and ADUs. Some clients want to convert an old garage or add a primary suite; others are demo-ing a house and rebuilding on the same footprint. ADUs are a big focus right now—they’re essentially small homes, but the approval process and planning strategies are different, which I love helping clients navigate.
What’s the first step for someone considering an ADU?
Start with the city. Ask about your lot’s setbacks, maximum square footage, height restrictions, and whether you're on sewer or septic. Even though I always confirm those details myself, I think it's empowering for homeowners to understand the basics before we meet.
What about budget? How do you help people avoid the "great plan, but can't afford it" trap?
I help them estimate early using square footage pricing. For most ADUs, construction runs around $500 per square foot in our area. So a 400 sq ft unit? Expect about $200,000. If that feels out of reach, we can scale back or explore options like converting an existing space, which can be more affordable.
Most people think ADUs have to be detached. What are some creative variations you've designed?
I've done garage conversions, basement units, even additions attached to the main home. One of my favorites was in Napa—a woman converted her basement into an ADU for her teens. Eventually, she plans to rent it out. It let her bypass parking requirements that would’ve kicked in if she just added more bedrooms.
Why does the ADU designation matter, even if you're not renting it out?
The state waives certain requirements for ADUs, like off-street parking if you're near public transit. You can convert your garage without needing to replace that parking, which isn’t true for standard additions. Even if it’s for a family member, legally calling it an ADU opens doors—sometimes literally.
Are there grants or loans available for ADUs?
Yes! Some counties offer forgivable loans—$40,000 to $70,000—if you rent the unit to someone low-income for 10 years. There are also special state-backed loan programs. A lot of clients also use HELOCs or cash-out refis. I always recommend checking the county website or working with a lender familiar with ADUs.
What makes your approach different from other professionals in your space?
It’s a one-stop shop. Instead of hiring a drafter and then a designer, you get someone who does both—and understands how to marry form and function. I think through how materials will meet, how a countertop edge lines up with a cabinet, how traffic flows through a room. I also help submit for permits and offer project management support.
You offer free site visits—that’s rare. Why?
I want both of us to feel good about working together. The site visit is like a first date. I’m not bringing samples or designing on the spot—it’s more about understanding the project, offering some insights, and seeing if there's a fit. And 90% of the time, clients move forward.
What’s one piece of advice you’d give someone who’s nervous about taking on a home project?
Just talk to someone. Book a consult and ask questions. When you have the right people on your team, the process feels a lot less overwhelming.
Where should people never cut corners, and where can they save?
Don’t skimp on structure. If you're doing new construction, spend a little more to get a vaulted ceiling—you won't regret it. Where you can save? Finishes. Opt for affordable but durable flooring or lighting and upgrade later.
What's a small design change that makes a big impact?
Paint. It's the simplest, most cost-effective way to completely transform a space.
Ready to get started? Here's how to connect with Jackie:
Visit jlm-designs.net to explore services, see past projects, and read verified reviews.
Reach out directly via email to schedule a call.
Or book a free site visit to talk through your project in person.
Connect with Jackie Mendez on Facebook or Instagram.
You can also find her on The M List, The Mamahood’s searchable database of mom-recommended resources, or connect and collaborate with Jackie inside The Club membership for women Founders.