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Get a full breakdown of ADU construction costs in Sacramento
Accessory Dwelling Units (ADUs) are rapidly becoming one of the most popular ways for Sacramento homeowners to add space, increase property value, or generate passive income. But what does it actually cost to build an ADU in Sacramento? And how do you know when you’ll need to pay?
In this blog, we’ll break down real pricing numbers based on actual IMKAT Homes projects, explain your financing options, and share a transparent payment schedule so you know exactly what to expect.
ADU Construction Cost in Sacramento (By Size and Layout)
Here’s what it typically costs to build a high-quality ADU in Sacramento with IMKAT, based on square footage and bedroom count:
| ADU SQFT | Cost | Financing |
|---|---|---|
| 300 SQFT ADU | $130,000+ | $910 / Month |
| 400 SQFT ADU | $140,000+ | $980 / Month |
| 500 SQFT ADU | $162,000+ | $1,134 / Month |
| 600 SQFT ADU | $174,000+ | $$1,218 / Month |
| 700 SQFT ADU | $197,000+ | $1,379/ Month |
| 800 SQFT ADU | $223,000+ | $1,561/ Month |
| 900 SQFT ADU | $248,000+ | $1,736/ Month |
| 1000 SQFT ADU | $258,000+ | $1,806/ Month |
| 1200 SQFT ADU | $278,000+ | $1,946/ Month |
💡 *Monthly payment estimates based on common ADU loan terms. Monthly payments will vary based on credit score and other factors. “
Factors That Affect Your ADU Construction Cost in Sacramento
1. ADU Type
Detached ADUs require a new foundation, separate utilities, and full structure—making them the most expensive.
Attached ADUs may need demolition and seamless integration with your existing home, also driving up costs.
Garage conversions are generally the most cost-effective, utilizing existing structures.
2. Size & Layout Complexity
Bigger units and open floorplans increase material and labor costs.
Choosing one of IMKAT’s pre-designed floor plans helps reduce design time and architectural fees.
3. Site Conditions
Sloped lots, compact soil, or poor drainage can lead to extra grading or retaining wall costs.
Accessibility issues may demand heavier machinery, adding to site prep costs.
4. Utility Access & Upgrades
Adding sewer, water, electric, or HVAC lines can add thousands, especially if your main panel is outdated.
City requirements (e.g. electrical panel upgrades) often drive these fees.
5. Finishes & Fixtures
Premium materials—like high-end kitchen cabinets, stone countertops, or designer bathrooms—elevate the budget quickly.
Opting for quality mid‑range finishes can look excellent without breaking the bank.
6. Local Fees & Permits
Sacramento’s permit fees range from $4,800 to $14,200+, depending on ADU size.
For ADUs over 750 sq ft, additional park, flood control, transportation, and school impact fees apply.
Permitting & City Fees for Sacramento ADUs (2025)
| Permit / Fee Type | 300–749 SQFT | 750–1,200 SQFT |
|---|---|---|
| Building Permit + Plan Review | ~$1,780 | ~$2,500 |
| Fire & Planning Inspections | Included above | Included |
| Public Works, Tech, Recycling | Included | Included |
| Park, Flood & Transportation Fees | $0 | $4,800–$6,000 |
| Estimated Total Fees | ~$4,800 | ~$10,000–$14,200 |
💡 ADUs under 750 sq ft may qualify for some special fee waivers per SB 13
Our Transparent Payment Schedule
Unlike other contractors, IMKAT makes it easy to understand when and what you’re paying for. Here’s our proven payment structure:
$1,000 Deposit – Locks in your project and secures your spot in our build queue.
2% at Floor Plan Design – Starts your custom ADU layout.
8% at Permit Submission – Covers preparation and submission to the city.
8% at Permit Approval – Paid only when your city approves the project.
20% at Foundation Completion – Includes trenching, slab, and underground utilities.
20% at Rough Framing – Walls, roof, and structure go up.
10% at Window Installation – Seals the structure.
17% at Drywall – Interior comes to life.
10% at Cabinet Installation – Kitchens and bathrooms are finalized.
5% at Completion – After final inspection and walkthrough.
What About ADU Financing?
We partner with top lenders who specialize in ADU loans for California homeowners. Whether you want to borrow against your home equity or explore zero-down options, our finance team can guide you through it.
- ✅ Low interest ADU loans
✅ Options for rental-income-backed financing
✅ Pre-qualification in under 24 hours
How to Save Money on Your ADU in Sacramento
choose pre-approved plans from Sacramento County’s Shelf-Ready ADU library or use IMKATs Floor Plans
Stick to mid-range materials for kitchen and bath finishes
Use a single design-build team like IMKAT to reduce coordination and avoid delays
Conduct a feasibility study early to avoid unexpected site or utility costs
Keep your ADU under 750 sq ft to avoid hefty impact fees
Don’t shop “cheapest quote”—opt for experienced builders to prevent costly change orders
Is Building an ADU Worth It in Sacramento?
Absolutely. The average Sacramento homeowner who rents out their ADU earns $2,000–$2,800/month. At that rate, most IMKAT-built ADUs break even in 6–8 years and deliver long-term cash flow for decades.
Thinking About Building an ADU?
Whether you’re planning a backyard home for family, retirement, or rental income, IMKAT Homes is Sacramento’s trusted ADU builder. We handle it all — from design and permitting to construction and final walkthrough.
- Serving Sacrament and the Bay Area
- Book a free consultation today to see what’s possible in your backyard.
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