Professional ADU Builder in San Leandro

Unlock your property’s hidden potential with the best ADU builder in San Leandro. We offer junior, attached, and detached ADUs, home additions, and garage conversions. At Geico Builders, we turn underutilized spaces into stylish, code-compliant structures that perfectly suit your needs.

Trusted Experts
Maximize Space & Revenue

Whether you dream of a compact junior suite for a home office, a full one-bedroom detached cottage, or a seamless garage conversion, as an ADU builder in San Leandro, we can convert idle square footage into functional assets.

Why Choose Geico Builders?

Versatile Solutions: From a new building to expansive home additions, we customize every plan to your vision and lot constraints.

Permitting & Code Expertise: Our in-house team manages zoning approvals, building permits, and city inspections for attached suites, detached units, and conversions.

Superior Craftsmanship: We use top-quality windows, insulation, and premium finishes to ensure durability, comfort, and low maintenance.

Turnkey Project Management: From design to final walkthrough, we coordinate each project from start to finish to ensure that when we step out, you can step in.

Local Experts
The Go-To ADU Builder in San Leandro

Investing in an ADU in San Leandro is a smart way to add living space and long-term value. Geico Builders provides:

Flexible Floor Plans: Studio layouts, one-bedroom cottages, or multi-room buildings tailored to your lifestyle.

Green Features: Solar-ready roofs, LED lighting, and high-performance energy-efficient HVAC systems for reduced costs.

Durable Exteriors & Interiors: Weather-resistant siding, moisture-resistant finishes, and low-VOC paints for lasting beauty.

Seamless Integration: ADUs and home extensions that match your existing architecture for cohesive curb appeal.

Why San Leandro Trusts Us

Comprehensive Site Assessment

We evaluate your property in order to optimize the placement of detached suites.

Licensed & Insured Team

We are licensed and insured, you can rest easy knowing we ensure every safety standard is met.

Custom Design

From built-in storage and pocket doors to premium hardware and trim, we personalize each dwelling down to the smallest detail.

Transparent Pricing

Clear, itemized quotes mean no surprises.

Efficient Timelines

We respect your schedule, completing ADU construction within your given timeline, not months later.

Dedicated Aftercare

Post-construction inspections, maintenance tips, and ongoing support keep your new residence operating at peak performance.

Our Process

01.

Consultation & Feasibility Review

We assess your site, explore possible configurations, and define project parameters.

02.

Design & Permitting

We draft detailed floor plans, then secure all necessary approvals on your behalf.

03.

Construction & Finishes

From slab to siding, we work with quality materials and code compliance.

04.

Final Inspection & Handover

We guide you through your new space, and provide full documentation.

Frequently Asked Questions

What is a junior ADU?

A junior dwelling (up to 500 sq ft) is created within your existing residence, ideal for a home office or guest room. It typically requires fewer approvals than a detached unit and integrates seamlessly with your floor plan. Many clients choose this option for its cost-effectiveness and quick turnaround. As your ADU builder in San Leandro, we’ll help you determine if this compact addition meets your needs.

Can I convert my garage into a livable unit?

Yes. As an experienced ADU builder in San Leandro, our garage conversions repurpose existing foundations and structures, adding insulation, plumbing, and finishes to deliver a comfortable, code-compliant suite. We integrate new utilities and ensure proper ventilation. This approach transforms underused space into valuable living spaces or short-term rentals.

How long does an ADU construction project take in San Leandro?

Whether it’s an ADU or a home remodel, timelines depend on the scope of the project and permitting. Most additions are completed in 4–6 months from approval to final inspection. Minor retrofit modifications may finish in 3 months, while detached ADUs typically require 6–8 months. We provide a detailed schedule before we begin, and maintain clear progress updates throughout.

What design styles can be incorporated in this upgrade?

From modern minimalist to classic craftsman, our ADU builder in San Leandro tailors every plan to complement your home’s character and personal taste. We provide 3D renderings and material boards so you can visualize your project.