ADU Structural Engineering in Bonita: Complete 2025 Guide

*AAA Engineering Design: California PE Licensed | 20+ Years Experience | 500+ Projects | Free Consultations*

ADU structural engineering in Bonita enables homeowners to add valuable accessory dwelling units to their properties with full California Building Code compliance. Our California-licensed Professional Engineers provide comprehensive ADU structural design services throughout Bonita, Chula Vista, National City, and San Diego County's South Bay communities, helping families create rental income, multigenerational living spaces, or home offices.

Bonita's larger lot sizes and established residential neighborhoods make it an ideal location for ADU development. Whether you're converting an existing garage, building a detached backyard unit, or adding a JADU within your home, proper structural engineering is essential for permit approval and long-term performance.

**Direct Answer:** ADU structural engineering encompasses the PE-stamped structural design services required to add accessory dwelling units to residential properties in Bonita. This includes foundation design, floor and wall framing, roof structure, and lateral (earthquake) bracing systems. California law now streamlines ADU permitting, but San Diego County still requires professionally engineered structural plans for building permit approval.

California's ADU laws have dramatically simplified the approval process, but structural safety requirements remain unchanged:

For comprehensive ADU guidance, see our Residential Structural Engineering Guide.

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**Direct Answer:** ADU structural services in Bonita include garage conversion engineering, detached ADU design, attached ADU additions, JADU (Junior ADU) conversions, and above-garage ADU engineering. California PE-licensed engineers provide stamped structural plans required by San Diego County for building permit approval, with designs that maximize your buildable area while meeting all code requirements.

> **Building an ADU in Bonita?** Our PE team delivers permit-ready structural plans. > **Call (949) 981-4448** | **Request Free ADU Consultation**

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**Direct Answer:** ADU permitting in Bonita follows San Diego County's streamlined process, which must comply with California state ADU law. San Diego County cannot impose minimum lot sizes, maximum ADU sizes below state limits, or owner-occupancy requirements. Structural engineering is required for all ADU types, and permit review typically takes 2-4 weeks for compliant ADU applications.

**Typical Bonita ADU Process:** 1. **Structural engineering:** 2-3 weeks 2. **Architectural plans:** 2-4 weeks (if needed) 3. **County plan check:** 2-4 weeks (ADU priority) 4. **Permit issuance:** 1-2 days after approval 5. **Construction:** 3-6 months typical

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**Direct Answer (2025 Pricing):** ADU structural engineering in Bonita typically costs $2,500-$6,500 depending on ADU type and complexity. Garage conversions run $2,500-$3,500. Detached ADUs range $3,500-$5,500. Attached ADUs and second-story ADUs cost $4,000-$6,500. JADU conversions are typically $2,000-$3,000.

**Bonita ADU Projects:** | ADU Type | Engineering Cost | |----------|-----------------| | JADU conversion | $2,000-$3,000 | | Garage conversion (basic) | $2,500-$3,500 | | Garage conversion (complex) | $3,500-$4,500 | | Detached ADU (up to 800 SF) | $3,500-$4,500 | | Detached ADU (800-1,200 SF) | $4,500-$5,500 | | Attached ADU | $4,000-$5,500 | | Above-garage ADU | $5,000-$6,500 |

**Typical Bonita ADU Costs:** | Component | Cost Range | |-----------|-----------| | Structural engineering | $2,500-$6,500 | | Architectural design | $3,000-$8,000 | | Permit fees | $2,000-$6,000 | | Construction (per SF) | $250-$400 | | Utility connections | $5,000-$15,000 |

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> "Converting our detached garage to an ADU for my mother-in-law was seamless with AAA Engineering. Their structural plans passed County review on the first submission." > — **Jennifer K., Bonita Homeowner**

> "We built a 1,000 SF detached ADU for rental income. AAA's engineering maximized our buildable space while staying within all setback requirements. It's now rented for $2,400/month." > — **David R., Bonita Property Owner**

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**Direct Answer:** AAA Engineering Design provides California PE-licensed ADU structural engineering with extensive San Diego County experience. Our familiarity with county requirements, streamlined permit processes, and ADU-specific code provisions ensures fast permit approval and cost-effective construction. We've helped over 150 San Diego homeowners add ADUs to their properties.

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Ready to add an ADU to your Bonita property? Whether you're converting a garage, building a detached unit, or exploring JADU options, our licensed Professional Engineers are here to help maximize your property's potential.

**Call Now: (949) 981-4448** - Free consultation

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Yes. California law now prohibits local restrictions that prevent ADUs on single-family residential lots. San Diego County must approve ADUs that meet state requirements regardless of lot size, zoning, or prior restrictions. The only limitations are state-mandated size and setback requirements.

Not always. JADUs can share utilities with the main home. Detached ADUs typically need separate electrical panels, but water and sewer connections may be shared in some cases. San Diego County determines connection requirements during plan review.

Detached ADUs can be up to 1,200 square feet. Attached ADUs can be up to 1,000 square feet or 50% of the primary dwelling (whichever is less). JADUs within existing space are limited to 500 square feet. These are state-mandated maximums that San Diego County must honor.

Yes. California law prohibits owner-occupancy requirements for ADUs. You can rent your ADU immediately upon receiving a certificate of occupancy. Short-term rentals (Airbnb, VRBO) may have separate local restrictions.

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