Home Additions & ADU Construction by 1 Degree Construction
1 Degree Construction is a Los Angeles-based contractor specializing in home additions and accessory dwelling unit (ADU) construction. Their services are aimed at homeowners looking to expand their living space, increase property value, or create additional income opportunities through rental units.
As an experienced ADU builder and home addition contractor, 1 Degree Construction handles projects of varying scope — from single-room expansions to full-scale detached ADU builds and garage conversions.
There are several practical reasons homeowners pursue additions and ADUs:
- More living space – Additional bedrooms, home offices, or entertainment areas
- Increased property value – A well-designed addition or ADU can improve resale potential
- Rental income – ADUs can function as long-term or short-term rental units
- Multigenerational living – Separate space for aging parents or adult children
- Home functionality – Customizing the home to meet growing needs without relocating
ADU and Home Addition Services
1 Degree Construction offers a range of construction services tailored to different needs and budgets. Their core offerings include:
Accessory Dwelling Units (ADUs) — As a full-service accessory dwelling unit builder, they construct several types of ADUs:
- Detached ADUs – Standalone units with full kitchens and bathrooms
- Attached ADUs – Connected to the main house with a private entry
- Garage conversions – Converting underutilized garage space into a livable unit
- Basement ADUs – Separate rental spaces or guest suites below grade
In-Law Suites & Multigenerational Living — As an in-law suite builder, 1 Degree Construction designs spaces that accommodate extended family. These typically include private entrances, kitchenettes, full bathrooms, laundry facilities, and custom accessibility features for aging-in-place solutions.
Second-Story Additions — For homeowners looking to maximize vertical space, they offer second-story builds that include new bedrooms, bathrooms, bonus rooms, and loft-style layouts, along with the necessary structural reinforcements.
Garage Conversions & Extensions — As a garage conversion contractor, 1 Degree Construction transforms garage spaces into functional living areas such as home gyms, guest rooms, or rental units. Work includes insulation, HVAC, plumbing upgrades, and smart storage solutions.
Custom Finishes — Additions are completed with finishes that integrate with the existing home, including hardwood, tile, or luxury vinyl plank (LVP) flooring, energy-efficient windows and doors, and custom-built storage solutions.
Construction Process & Project Timelines
1 Degree Construction follows a structured process from initial consultation through final walkthrough. Key stages include design planning, material selection, permit handling, site preparation, construction, and a final quality inspection. They manage all necessary permits and ensure compliance with local building codes.
General project timelines vary based on scope:
- Small projects (garage conversions, single-room expansions): 3–6 months
- Mid-size additions (multi-room expansions, attached ADUs): 6–9 months
- Large-scale builds (detached ADUs, second-story additions): 9–12+ months
Budget ranges also vary considerably. Garage conversions and single-room additions typically start around $30,000–$75,000, mid-size projects fall in the $75,000–$150,000 range, and full detached ADU builds or second-story additions generally start at $150,000 and above. Costs are influenced by foundation work, plumbing and electrical requirements, and material selections.
ADU requirements in Los Angeles and surrounding areas are subject to local zoning regulations, lot size minimums, size restrictions (typically 500–1,200 sq ft), and utility considerations. 1 Degree Construction handles the permitting process as part of their service.
For homeowners considering the financial impact, adding an ADU or home addition affects property taxes only on the newly added square footage, while the original home's tax base remains unchanged. Some areas also offer tax incentives for ADUs used as rental properties.
