The General Contractor Advantage: One Point of Contact
GreenRun Construction managing complex structural framing and multi-room residential additions.[/caption]While our daily operations focus on home envelope protection, siding, windows, and targeted repairs, our California General Building Contractor license equips us to handle full-scale structural builds from the ground up.
Complex construction—such as an Accessory Dwelling Unit (ADU) or a multi-room addition—requires precise coordination across dozens of trade disciplines. GreenRun Construction acts as your central project supervisor. We lead your build from initial plan review and local permitting through structural framing, specialty trade management, and final inspection sign-off.
Major Construction Services We Manage
Accessory Dwelling Units (ADUs) & JADUs
Accessory Dwelling Units (ADUs) & JADUsWhether building a detached backyard cottage, an attached living suite, or converting an existing garage into a Junior ADU (JADU), we manage the entire project lifecycle for multigenerational living or rental income opportunities.
Room Additions & Home Expansions
Need more living space? We execute primary suite additions, kitchen expansions, bump-outs, and multi-room floor plan expansions designed to blend seamlessly into your home’s existing architecture.
Structural Modifications & Open-Concept Conversion
Removing load-bearing interior or exterior walls requires structural engineering, header installations, and temporary shoring. We safely reconfigure aging layouts into open, modern living spaces.
Complex Framing & Foundation Upgrades
From heavy timber framing to specialized foundation retrofits and hillside structural support, our crew provides the structural backbone necessary for safe, code-compliant building.
Managed Specialty Trade Network
Managing individual plumbers, electricians, concrete crews, and HVAC technicians on a large job site can be overwhelming. When you partner with GreenRun Construction, you get single-contract accountability:
Vetted Trade Partners: We partner exclusively with trusted, licensed, and insured local specialists (plumbers, electricians, foundation crews, and structural engineers).
Complete Oversight: We direct daily job-site schedules, enforce safety protocols, verify building code compliance, and handle all municipal inspections.
Single Warranty: You receive direct communication through one dedicated project supervisor, backed by GreenRun Construction’s unified workmanship warranty.
❓ Answers to Your Questions
Do you handle ADUs and room additions from start to finish?
Yes. As a licensed General Contractor, we can oversee every phase of the project—including site preparation, permit coordination through Permit Sonoma or city building departments, trade management, framing, finish work, and final inspection sign-offs.
How do you manage specialty subcontractors on large builds?
We maintain relationships with vetted, licensed trade specialists (plumbers, electricians, HVAC installers, and concrete crews). We manage their scheduling, site safety, quality control, and code compliance directly, so you only deal with one contract and one primary contact.
Do ADUs or room additions require building permits in Sonoma County?
Yes. Major structural additions, garage conversions, and ADUs require plan approvals, structural engineering calculations, building permits, and mandatory municipal inspections. GreenRun Construction can manage this entire permitting workflow on your behalf.
How are project costs structured for large custom builds like ADUs or additions?
Because major construction involves extended design, engineering, and municipal permit review periods, project pricing is structured in distinct phases. Initial agreements cover pre-construction services, engineering, and permit coordination. Final labor and material costs for the physical build are established and confirmed only when permits are issued, the active construction schedule is set and timeline is determined, and materials are ready to be ordered for job-site delivery.