Our Services
35 years of design, engineering, and permitting in Orange County
Avenida Design Build does it all — design, drawings, every type of engineering your project needs, and full permit management. Because we know how local cities work, we get your project approved faster and for less. Every project starts with a free Permit Requirement Report so you know what you can build before you pay for plans.
Accessory Dwelling Units
ADU Design & Build
Create a fully independent living space on your property. ADUs are perfect for rental income, multi-generational living, or accommodating a growing family. We handle everything from your first permit review through final inspection.
Ideal for:
Homeowners looking to maximize property value, create rental income, or house family members independently.
What's Included
- Site assessment and feasibility study
- Custom architectural design
- Full permit management
- Complete construction
- Utility connections and landscaping
Transform Unused Space
Garage Conversions
Convert your underutilized garage into beautiful, permitted living space. Garage conversions are often the most cost-effective way to add square footage to your home while creating valuable ADU or living space.
Ideal for:
Homeowners with garages used primarily for storage who want to create functional living space.
What's Included
- Structural assessment
- Floor plan optimization
- Electrical and plumbing upgrades
- Insulation and climate control
- Parking replacement solutions
Expand Your Footprint
Home Additions
Thoughtfully designed additions that blend seamlessly with your existing home. Whether you need an extra bedroom, expanded kitchen, or dedicated home office, we create additions that feel like they were always part of the original design.
Ideal for:
Growing families or homeowners who love their location but need more space.
What's Included
- Architectural design integration
- Foundation and structural work
- Matching exterior finishes
- Interior finish coordination
- Full permit and inspection management
Junior Accessory Dwelling Units
JADUs
Create flexible living arrangements within your existing home footprint. JADUs convert existing space (like a bedroom or attached garage) into a semi-independent unit with its own entrance and efficiency kitchen.
Ideal for:
Homeowners wanting a more affordable ADU option or those with space constraints for detached construction.
What's Included
- Space planning and layout design
- Separate entrance creation
- Efficiency kitchen installation
- Bathroom addition or upgrade
- Permit streamlining
Major Renovations
Remodels
Complete home renovations that modernize your space while navigating complex permit requirements. From kitchen and bath remodels to whole-home transformations, we manage every detail.
Ideal for:
Homeowners ready to significantly update their living space with professional design and construction.
What's Included
- Design consultation and planning
- Permit research and application
- Structural modifications
- MEP system upgrades
- Finish selection and installation
Detached Structures
Backyard Studios
Custom detached structures perfect for home offices, art studios, fitness rooms, or guest accommodations. These versatile buildings add functional space without modifying your main home.
Ideal for:
Remote workers, artists, fitness enthusiasts, or anyone needing dedicated space separate from the main house.
What's Included
- Custom design to match your home
- Foundation and utility planning
- Climate control systems
- Electrical and connectivity
- Landscaping integration
All Engineering Under One Roof
Every type of engineering your permit may require
Most projects stall because a required engineering report is missing. We provide every discipline a city may ask for in-house, so your permit moves forward without delays or surprise costs.
Architectural Design
Plans and drawings cities accept the first time.
Structural Engineering
Foundations, framing, and load calculations.
Civil Engineering
Grading, drainage, and site development.
Soils & Geotechnical
Reports cities require for new structures.
Plumbing & MEP
Mechanical, electrical, and plumbing design.
Energy & Title 24
Compliance documentation for approval.
Not sure which service fits your project?
Start with a free Permit Requirement Report. We'll show you what you can build, what your city requires, and the fastest, lowest-cost path to get it approved.