Luma Dwellings Blog
Home Building Cost Challenges: How Much Should This Cost?!
July 29, 2025 by Leon Lai
Let’s talk about one of the biggest, most mysterious beasts in the homebuilding jungle: Cost.
Now, if you’ve ever thought about building a home, adding an ADU, or even just redoing your bathroom, you’ve probably asked the age-old question: “Wait… how much??” And no, you’re not being dramatic—because in this industry, prices can swing wider than a teenager’s mood on prom night.
Take it from us. We were recently quoted $19,500—yes, you read that right—to clear some weeds in Orinda. Not build a pool. Not pour a foundation. Just clear weeds. So if you’re confused about pricing, trust us—you are not alone.
Here’s the reality: Unlike buying a pair of sneakers (where $100 gets you… well, hopefully two shoes and a shoelace), in construction, there’s no clear price tag that says, “This is a fair deal.” One designer might quote you $25,000 to design your ADU. Another, equally talented and experienced designer? $5,000. Same deliverables, five times the price. Welcome to the wild west of homebuilding.
And that’s exactly why Luma Dwellings exists.
We’ve spent the last few years getting our hands dirty (and occasionally ripped off) so you don’t have to. We’ve vetted the overpriced, the underwhelming, and the hidden gems. We know who does good work, who charges fair prices, and which quotes should come with a warning label.
So whether you’re building from scratch or adding a backyard ADU for the in-laws (or escape from the in-laws), our goal is simple: Give you great design, smart construction, and honest pricing.
No fluff. No mystery weeds. Just solid value and a team that actually gives a damn.
Let’s build something great—without breaking the bank (or your sanity).
Want help navigating your own build? Hit us up. We’re real people, we answer our phones, and we’ve got opinions.
Plan Sets Necessary to Build New Home or ADU
July 25, 2025 by Leon Lai
What Plan Sets You Need to Build an ADU or New Home:
Building a new ADU or home is a complex process—but with the right team, it doesn’t have to feel overwhelming. At Luma Dwellings, we help you navigate every step, from the very first survey to the final structural plans. We coordinate with architects, engineers, and consultants to get every plan set you need built out, submitted, and approved.
If you’re planning to build on an empty hillside lot, here’s a high-level breakdown of the essential plan sets—and the order they typically come together in.
1. Survey + Topographic Map
This is where it all starts.
Before any design or engineering can happen, you need a professional land survey with topographic data to define the shape, slope, and boundaries of your lot.
What it includes:
- Property lines and setbacks
- Elevation contours
- Trees, retaining walls, driveways, and other site features
Why it matters:
Architects and engineers rely on this map to design your home in compliance with zoning, grading, and height limits. It’s the base layer for everything else.
2. Geotechnical (Soils) Report
Once the survey is done, the next step is to understand what’s under the surface.
What it includes:
- Soil composition and stability
- Slope conditions
- Groundwater and drainage patterns
- Foundation recommendations
Why it matters:
Hillside properties often have unique risks. This report helps structural and civil engineers design safe, code-compliant solutions tailored to your specific lot.
3. Architectural Plan Set
With your site data and soils report in hand, the design work can begin.
What it includes:
- Site plan
- Floor plans
- Elevations
- Sections and roof plans
- Window and door schedules
- Code notes and design details
Why it matters:
This is the visual and functional blueprint of your home or ADU. It’s also the primary document used to begin the permitting process.
4. Civil Engineering Plans (Grading + Utilities)
Building on a hillside often means reshaping the land and managing water flow.
What it includes:
- Grading plan (cut, fill, slopes)
- Stormwater drainage design
- Sewer, water, and utility connections
- Erosion control and site access
Why it matters:
Cities and counties won’t approve a project without a plan for how your site handles water and integrates with public infrastructure—especially on a slope.
5. Structural + Foundation Plans
This set brings it all together, showing exactly how your home or ADU will be built and supported.
What it includes:
- Foundation layout (piers, footings, caissons, grade beams)
- Framing plans for walls, floors, and roof
- Structural details and construction notes
- Engineering calculations
Why it matters:
These plans ensure your building is structurally sound, earthquake-resistant, and compliant with code—based on the geotech report and architectural design.
Other Plan Sets You May Need:
Depending on your location and project type, additional sets may be required:
- Title 24 Energy Calculations (California energy compliance)
- Landscape Plans (especially in hillside or fire zones)
- Fire Sprinkler Plans (if required by local fire codes)
The Typical Plan Set Timeline:
Here’s the usual order in which your plan sets come together:
- Survey + Topographic Map
- Geotechnical (Soils) Report
- Architectural Design
- Civil Engineering (Grading + Utilities)
- Structural + Foundation Plans
- Submit for Permits
At Luma Dwellings, we make this process easier by managing the entire design and pre-construction phase. You bring the dream—we handle the experts, the paperwork, and the red tape.
Ready to build? Let’s talk. We’ll help you get the plan sets you need to make it real.
SB9 in California: What It Means for You
July 23, 2025 by Leon Lai
🚨 SB9 – The Quick & Clear Breakdown
SB9, or Senate Bill 9, is a California housing law that went into effect in 2022. It was designed to help with the housing shortage and give homeowners more freedom with their properties.
✅ What SB9 Allows You to Do:
- Split your single-family lot into two.
- Build two homes on each of those lots.
- That’s up to 4 units total where one house used to be.
- You can even sell off the new lot or units.
Yep. From one home to four, legally.
🧠 SB9 in Plain English
SB9 is like getting a permission slip to maximize your lot’s value—whether you want more space for family, generate rental income, or sell a piece of your land.
You don’t need to be a developer to take advantage of SB9. Regular homeowners can use this law too.
What Counts, What Doesn’t
Not every lot qualifies. Here’s what you need to know:
Your Lot May Qualify If:
- It’s in an urban area zoned for single-family homes.
- It’s not in a historic district or environmentally protected area.
- You’ve lived in the home for at least 3 years (if you’re a landlord).
- You’re not demolishing rent-controlled or affordable housing.
Always check your local regulations—we can help with that.
🔪 The SB9 Lot Split – Double the Land, Double the Options
Under SB9, you can split your lot into two—minimum size is usually 1,200 sq ft per lot. After that:
- Build up to 2 homes per lot.
- That means up to 4 units total on your original parcel.
- Best part? You can sell off one of the lots separately.
This opens the door to building wealth, downsizing, or creating multi-generational living—all without leaving your neighborhood.
🏡 What About Orinda, CA?
Orinda is a beautiful place with big lots and tight rules. But here’s the good news:
- Orinda complies with SB9, so lot splits and new units are allowed if you meet the criteria.
- You can build a detached ADU (Accessory Dwelling Unit) of up to 1,200 sq ft in Orinda.
- That’s on top of the SB9 units—if you play your cards right.
Imagine having:
- Your main house ✅
- An ADU ✅
- A lot split ✅
- Another house and another ADU ✅
That’s four separate dwellings, potentially on one piece of land. And yes—you can sell the split lot.
🔨 What Can You Do With SB9?
Here are some real possibilities:
- Build a rental unit or two for passive income.
- Create housing for family—kids, parents, or both.
- Split the lot, build and sell one half.
- Downsize into a new unit and rent or sell your existing house.
- Increase your property value (a lot).
🏁 The Bottom Line
SB9 is your ticket to flexibility, freedom, and financial opportunity. Whether you want to build, split, rent, or sell—this law puts the power in your hands.
At Luma Dwellings, we help homeowners like you navigate the rules, design smart dwellings, and maximize your property—especially in high-opportunity cities like Orinda.
Ready to see what’s possible on your lot?
👉 Let’s talk SB9. Let’s build smart. Let’s make it happen.
What to Expect From a Free Initial Consultation with Luma Dwellings
July 21, 2025 by Leon Lai
At Luma Dwellings, we believe every great build starts with a conversation—and that conversation is always free. Whether you’re dreaming of an ADU in the backyard for your in-laws, adding square footage for your growing family, or starting fresh with a custom home on an empty lot, our initial consultation is designed to help us get to know you—your story, your needs, and your vision.
We typically begin by sitting down with you for a one-on-one meeting to understand what matters most to your household. Do you need more space for your kids? A private unit for a parent or guest? A fresh start with a home that’s built exactly the way you’ve always imagined? Every family has different goals, and we want to make sure we’re building toward what’s most important to yours.
We’ll ask lots of questions—about your lifestyle, your priorities, your must-haves and nice-to-haves. We want to get a sense of the way your family lives now, and how you hope to live once the project is complete. Our goal is to gather enough insight to provide ideas, realistic timelines, and a roadmap that’s tailored just for you.
If we both feel there’s a strong fit between your vision and what Luma Dwellings brings to the table, we’ll typically schedule a second, more detailed on-site visit. That’s when we’ll bring in our trusted construction manager, Jose Diaz. Jose has years of hands-on experience and a sharp eye for the field. During this visit, he’ll assess the existing conditions and provide a more accurate picture of construction feasibility and cost expectations.
From there, if all feels aligned, we can begin shaping a proposal and pathway forward. But it all begins with that first meeting—no pressure, no obligation. Just a friendly conversation about how we can help bring your ideas to life.
Ready to start the conversation? Reach out and book your free consultation today. Let’s build something great, together.