Services
Residential Construction & Design Services
At LJ 21 Construction & Design Studio Inc., we provide full-service residential construction and design solutions throughout San Diego & Riverside County.
Since 2013, our licensed team has specialized in custom homes, ADUs, remodeling, additions, and permit-ready construction plans — guiding homeowners from concept to completion with personalized, one-on-one service.
Custom Homes
As an experienced custom home builder in San Diego County, we design and construct homes tailored to your lifestyle, vision, and budget. From architectural planning to final construction, our in-house team manages every detail to ensure a seamless build.
- Ground-up custom home construction
- Personalized floorplans
- City permits and approvals
- Full project management
Remodels & Additions
Upgrade and expand your home with a trusted home remodeling contractor serving San Diego, Temecula, and Murrieta. We focus on modern design, structural integrity, and long-term value.
- Kitchen remodeling
- Bathroom remodeling
- Whole-home renovations
- Room additions
- Second-story additions
Design & Permitting
Our in-house team prepares detailed construction drawings and manages city permitting, helping avoid costly delays. We understand local building codes and handle the approval process from start to finish.
- Construction floorplans
- Permit applications
- Code compliance
- Plan revisions
Demolition and Hauling
Prepare your project site safely and efficiently with our professional demolition and hauling services. We handle everything from structure removal to debris cleanup, ensuring your site is ready for the next phase of construction.
- Interior and exterior demolition
- Structure removal
- Debris hauling and disposal
- Site cleanup and preparation
Equipment Rental
Support your construction project with reliable equipment available for rent. We provide access to the tools and machinery needed to keep your project moving efficiently.
- Construction equipment rental
- Flexible rental options
- Well-maintained machinery
- Support for residential projects
ADU’s & Garage Conversions
We specialize in ADU construction and garage conversions in San Diego. Whether you’re building for rental income, multigenerational living, or additional space, we streamline the design and permitting process to help you build efficiently.
- Detached ADUs
- Attached ADUs
- Junior ADUs (JADUs)
- Garage conversions
- Permit-ready design solutions
Outdoor & Pools
Enhance your property with custom outdoor living spaces designed for comfort and entertainment. We build functional, beautiful environments that extend your living space outdoors.
- Custom pool construction
- Patios and outdoor kitchens
- Hardscape design
- Backyard transformations
Ready-to-Build Plans
Save time and reduce permitting headaches with our permit-ready construction plans previously approved by the city. These ready-to-build designs offer a faster and more cost-effective way to begin your project.
- Pre-approved plan sets
- ADU designs
- City-reviewed drawings
- Streamlined approval process