Home » Attached ADU Construction in Antelope & Sacramento, CA

Attached ADU Construction in Antelope & Sacramento, CA

Burnette Construction is a licensed attached ADU construction contractor serving Antelope, CA and Sacramento County. We manage every phase of your attached ADU project, from feasibility analysis and architectural planning through permitting, structural integration, and final inspection. Our team delivers code-compliant attached ADUs built to perform long-term whether the unit is used for rental income, multigenerational housing, or aging-in-place living.

Why Homeowners Choose Burnette Construction for Attached ADU Projects

5+ years of hands-on experience delivering attached ADU construction projects in Antelope, CA
Locally based contractor with active knowledge of Antelope City and Sacramento County permitting requirements
Fully licensed and insured attached ADU construction contractor
Proven expertise in structural tie-ins, shared-wall assemblies, and occupied-home construction
Permit-driven planning aligned with local building and inspection standards
Occupied-home construction workflows tailored for attached ADU projects
In-house construction management coordinating all trade partners under one plan
Clear written scopes, defined allowances, and structured construction milestones
Professional project closeout with inspections, documentation & warranty handoff

What are Our Attached ADU Construction Services in Antelope, CA

Attached ADU projects are most successful when delivered as a complete design-build service. Each phase below is planned to reduce uncertainty and keep your project moving forward.

Attached ADU Design and Space Planning

Connecting a secondary living suite to an existing home requires structural engineering from a full-service residential contractor in Sacramento to design soundproof, fire-rated shared assemblies that preserve primary residence quiet. Framers secure Simpson Strong-Tie DTT2Z tension ties and dense Owens Corning Thermafiber mineral wool batts using a Milwaukee M18 FUEL framing nailer. Common wall penetrations satisfy California Residential Code Section R302 one-hour fire-resistance separation mandates. We plan studio, one-bedroom, and two-bedroom attached ADU layouts with entry placement strategies that support privacy, circulation, and fire separation. Our design process optimizes daylighting, egress, and interior flow while coordinating exterior rooflines, window placement, and finish continuity with the existing home. Space planning begins with a structural assessment of the shared wall assemblies. We scan the existing framing with a thermal imaging camera to identify insulation voids, moisture pockets, and hidden electrical routes before design work begins. Structural shear panels are then mapped into the floor plan to satisfy CBC Section 2308 prescriptive framing standards without requiring costly engineering corrections mid-construction.

Two-Story Attached ADU and Bump-Out Extensions

For properties where lot coverage, setbacks, or yard constraints limit ground-level expansion, two-story attached ADUs and bump-out extensions offer a proven solution. We manage structural capacity assessment, load-path planning, and construction sequencing from the design phase forward to ensure the vertical expansion is safe, compliant, and well-integrated with the original structure. Where the existing foundation cannot carry the additional vertical and lateral load, we install a helical pier foundation system anchored below the active clay zone. Anchor bolt openings in the existing concrete perimeter are precision-drilled using a rotary hammer drill, and every pier is engineered to meet Zone D1 seismic soil classification requirements under CBC Chapter 16 the seismic standard applicable to Antelope and Sacramento County residential construction.

Attached ADU Construction

We deliver attached ADU construction using an occupied-home methodology that prioritizes safety, quality control, and schedule discipline. To integrate with the existing framing and foundation without compromising load paths, we install engineered LVL headers at the tie-in points, using a laser layout tool to guarantee perfect alignment. This ensures complete structural stability over Antelope’s expansive clay soils while meeting California Building Code load-path standards.

Garage-to-Attached ADU Conversions

Underused garages are well-positioned to become fully functional attached ADUs. We seal the concrete slab against moisture using an epoxy vapor barrier membrane before laying down subflooring. Our team then routes all plumbing and sewer lines utilizing a pipe laser level to ensure a perfect 2% grade, complying with Sacramento County plumbing codes.

Junior ADU (JADU) Retrofit

Burnette Construction provides professional Junior ADU retrofit services for qualifying single-family residences. To meet Sacramento County’s strict Title 24 energy standards, we install a high-efficiency ductless mini-split HVAC system and high-density R-19 fiberglass insulation batts in the walls. Our installers utilize a digital air-balancing hood to verify airflow rates conform to local mechanical inspection checklists.

HOW IT WORKS

Clear Communication Every Step of the Way

Building your dream space shouldn’t be stressful. Here is how we turn your vision into reality with a smooth, predictable process.

1

Initial Call

Confirm service fit, property location, budget, and readiness

2

Site Review

Review conditions, acess, objectives, and existing documents.

3

Scope Development

Define include work, assumptions, exclusions, and allowances.

4

Proposal

Present a clear written proposal and next-step requirements.

5

Preconstruction

coordinate selections, plans, permits, schedule, and mobilization.

6

Construction

manage trades, inspections, updates, chnages, and quality control.

7

Closeout

Complete walkthrough, punch list, documentation, and trunover.

Local Service Area

Attached ADU Construction Service Areas

Burnette Construction provides attached ADU construction services throughout Sacramento County and neighboring communities, including Antelope, Carmichael, Fair Oaks, Orangevale, Rancho Cordova, Elk Grove, Citrus Heights, Midtown Sacramento, East Sacramento, Land Park, Natomas, Arden-Arcade, and Pocket-Greenhaven.

⭐ INSTANT SACRAMENTO COST ESTIMATOR

Planning Your Attached ADU? Calculate Accurate Costs in 60 Seconds

Get instant Sacramento County permit-ready estimates based on square footage, finish tier, and site conditions. Real builder pricing with transparent budgeting.

✓ Sacramento Impact Fee Rules Under 750 Sq Ft Built-In • ✓ CSLB Lic #1084547 • ✓ Instant On-Screen Result

Start Your Attached ADU Project in Antelope, CA

If you are considering an attached ADU and want clear answers on construction cost, feasibility, and timeline, the first step is a property assessment. Burnette Construction will review your site, outline your options, and provide a straightforward estimate based on your actual project scope.

Engineering Specifications & Local Code Compliance — Attached ADU Construction in Antelope & Sacramento, CA

Burnette Construction (CSLB #1084547) executes every project using 5/8-inch USG Sheetrock Firecode X Type X gypsum board over RC-1 resilient sound channels, calibrated on-site with a Simpson Strong-Tie SET-3G high-strength epoxy dispensing system with SDS-max rotary hammer to satisfy California Residential Code (CRC) Section R302.3 1-hour fire-resistance-rated wall/floor-ceiling separation assembly between primary dwelling and attached ADU.

Need an instant line-item budget before permitting? Launch our interactive Attached ADU Construction Cost Calculator or call our veteran-led engineering desk at (916) 821-9353.

Specialized Attached & Two-Story Solutions: Explore our Multi-Story & Two-Story ADU Construction engineering, compare Attached ADU Construction Cost, Attached ADU vs. Detached ADU, and Two-Story ADU Cost Breakdown, or view local permitting in Carmichael, Fair Oaks, Rancho Cordova, and Rocklin, CA.

Frequently Asked Questions

What is an attached ADU in Antelope?

An attached ADU is a secondary living unit that shares at least one wall with the primary home. It must meet California Building Code standards for structural integration, fire separation, and habitable space, as well as local zoning requirements for setbacks, lot coverage, and utility access.

How much does attached ADU construction cost in Antelope, CA?

Attached ADU construction costs in Antelope, CA typically range based on unit size, structural complexity, and finish selections. Structural tie-ins and shared utility systems often influence the final cost more than square footage alone. We provide detailed line-item estimates after reviewing your property.

How long does it take to build an attached ADU?

Most attached ADU projects take 6 to 10 months from initial design to final inspection, depending on plan check timelines at Sacramento County and site-specific construction complexity.

Do you handle attached ADU permits in Antelope, CA?

Yes. Burnette Construction manages the full permitting process, including architectural plan preparation, plan check submission, responding to corrections, and coordinating all required building inspections through final sign-off.

Can I live in my home during attached ADU construction?

Yes. Burnette Construction uses an occupied-home construction methodology designed specifically to minimize disruption. Site protection, sequencing, and access control are built into the construction plan from the start.

Will my electrical panel need an upgrade?

Possibly. Adding an attached ADU increases the electrical load on your property. We assess your panel capacity during the feasibility review and coordinate any required upgrades as part of the construction scope.

Can an attached ADU have a separate entrance?

Yes. A separate entrance is standard for attached ADUs and is required to meet privacy and independent-use standards. We plan entry placement as part of the initial design to optimize circulation and compliance.