Adding square footage is one of the highest-return investments a Los Angeles homeowner can make. The right addition increases property value, extends livable space to match how your family actually lives, and — when built by a team that respects the existing architecture — looks like it has always been part of the home. DG Custom Construction & Electric designs and builds additions across Pasadena, Altadena, Sherman Oaks, Malibu, and the greater LA area with matching rooflines, proper structural integration, and finishes that blend seamlessly with the original structure.
Additions are more than new square footage. They require careful zoning review, setback analysis, permit coordination, utility sizing, and structural tie-in to the existing home. Doing it right the first time protects the resale value, the appraisal, and the livability of the addition for the decades you own the home.
Addition Types We Specialize In
Kitchen Expansion
The highest-ROI addition in most LA-area homes. Kitchen expansions push out a wall, raise a ceiling, or combine the kitchen with an adjacent dining or family room to create open, light-filled, entertainment-ready spaces. See our dedicated Kitchen Expansion page for full detail.Bathroom Addition or Remodel
Adding a primary ensuite, a guest bath, or a kid-friendly jack-and-jill arrangement. Bathroom additions solve livability problems fast and pay back strongly at resale. See our Bathroom Remodel & Addition page for full detail.Bedroom Addition
Primary suites, second children's bedrooms, guest rooms, and full second-story additions. Sleeping-space additions change daily life more than almost any other project. See our Bedroom Addition page for full detail.Room Additions
Home offices, dens, media rooms, in-law spaces, sunrooms, and bonus rooms. Additional rooms let your home keep up with how the household actually functions. See our Room Additions page for full detail.Second-Story Additions
On lots where the footprint is maxed out, building up is often the only way to add meaningful space. Second-story additions require structural engineering, foundation analysis, and careful architectural matching.Garage Conversions & ADUs
Technically additions of livable space, garage conversions and detached ADUs are a separate service with their own rules under California ADU law. See our ADU Construction page.What to Consider Before Adding On
Zoning and Setbacks
Every LA-area jurisdiction has its own rules for how close an addition can come to property lines, how tall it can be, how much of the lot can be covered, and which areas allow ADUs versus conventional additions. We review your lot against the applicable zoning before designing anything.Permits
Every meaningful addition requires a permit. We handle full permit submittal, plan check, and inspections across LA City, LA County, Pasadena, and neighboring jurisdictions.Utilities and Capacity
A 2,000-square-foot addition connected to a 1965 100-amp electrical panel is a problem — so is adding three bathrooms to a house on a single water main. Good addition design starts by verifying the home's existing systems can handle the new load, and upgrading them in the same project if they can't.Structural Tie-In
Where an addition meets the existing house is the most technically demanding part of the job. Proper structural tie-in — ledger boards, shared foundations, matching wall framing, and consistent roof geometry — is the difference between an addition that lasts and one that cracks, leaks, or reads as obviously bolted on.Architectural Consistency
The addition should look like it has always been there. That means matching the existing roof pitch, eaves, siding, window proportions, trim details, and interior millwork. We hold ourselves to this standard on every project.Our Addition Process
Discovery and site walk → zoning and feasibility review → written scope and budget → design coordination → permit submittal → site work and structural tie-in → framing and rough-in → finishes → final inspection and warranty. Homeowners always know where we are in the process and what decisions are coming next.
Electrical and Systems Integration
Every addition we build is served with properly sized electrical circuits, adequate lighting design, HVAC zoning, and plumbing tie-ins that won't compromise existing systems. Our in-house electricians plan the electrical layout alongside the architectural design, not after — which means proper circuit capacity, lighting symmetry, and smart-home readiness from day one.
Where We Build
DG Custom Construction & Electric Inc. serves homeowners and property owners across Pasadena, Altadena, Sherman Oaks, Malibu, and greater Los Angeles. If your project is in LA County, we would like to hear from you.