Estate-scale electrical planning for custom homes and major renovations—from load studies and service sizing to switchgear, underground utilities, PG&E coordination, resilient power and final commissioning.
Large custom homes can combine multiple EV chargers, heat pumps, induction cooking, pools and spas, theaters, golf simulators, lighting control, security, network equipment and extensive landscape loads. Regent5 starts with the calculated demand, then sizes the service and distribution around the actual project rather than guessing from the panel that happens to be there today.
A major service upgrade is not simply a panel replacement. Utility capacity, meter location, service conductors, transformers, trench routes and local inspection requirements can shape the entire project. Regent5 coordinates the application, load information, site documentation and field sequence so the electrical design and utility design move together.
There is no universal service size for an estate. Regent5 evaluates present and future loads, diversification, EV charging, HVAC, pool equipment, lighting, technology systems and resilient-power goals, then coordinates the service entrance, switchgear, distribution and panel strategy around the result.
Most residences are best served by a properly sized single-phase service. Three-phase power becomes relevant when the loads or available utility infrastructure justify it—for example certain HVAC equipment, elevators, pumps, workshops or mixed residential-commercial properties. Regent5 evaluates the requirement and utility availability before recommending a direction.
High-capacity service upgrades often reach beyond the electrical room. Conduit, trenching, transformer locations, vaults, meter routes and site restoration can affect landscape, civil work and construction sequencing. Those interfaces are coordinated early so the service path is buildable before the site is finished.
The service upgrade is the right time to define resilient power. Regent5 coordinates the main service with battery storage, solar, generators, managed EV charging and critical-load priorities so the home is designed as one electrical system instead of a stack of unrelated equipment purchases.
Regent5 supports estate-scale electrical projects across Northern California, including the Peninsula, San Francisco, South Bay, East Bay, Marin, Wine Country and Carmel/Monterey. Utility requirements vary by jurisdiction; Palo Alto, for example, is served by City of Palo Alto Utilities rather than PG&E, so the coordination path is different.
The exact package depends on the property and utility, but these are the recurring engineering and construction interfaces Regent5 coordinates on high-capacity residential service projects.
Calculated demand, future loads and utility constraints evaluated before selecting a 320A, 400A, 600A, 800A, 1000A+ or other engineered service configuration.
Application documents, load information, site plans, service locations and required utility coordination assembled and managed around the project schedule.
Service entrance, feeders, distribution panels, subpanels and major loads coordinated into a clear electrical architecture for the property.
Main switchgear, meters, disconnects, panel locations, working clearances and equipment-room interfaces resolved before construction locks in the space.
Conduit, trench routes, transformer or vault conditions, meter paths and civil/landscape interfaces coordinated with the utility and project team.
Multi-vehicle charging and controllable loads planned with the service calculation so capacity can be allocated intelligently as demand changes.
Battery storage, solar, standby generation and critical-load priorities coordinated with the service upgrade rather than treated as separate projects.
Phase, voltage, equipment requirements and utility availability evaluated before three-phase service is recommended for a residential or mixed-use property.
Installation sequence, utility interfaces, local permitting, inspections and energization milestones coordinated with the GC and site team.
Final panel schedules, labeling, testing, operating documentation and project records organized so the upgraded electrical system remains serviceable long term.
Where we work.
Regent5 plans and builds high-capacity residential electrical systems across the San Francisco Bay Area and Northern California, including Atherton, Woodside, Hillsborough, Portola Valley, Menlo Park, Palo Alto, Los Altos Hills, Saratoga, San Francisco, Marin, Wine Country and Carmel/Monterey. Utility coordination follows the serving utility and local authority for each property rather than assuming one process applies everywhere.
A load calculation is the starting point. EV charging, heat pumps, induction cooking, pool equipment, theaters, golf simulators, lighting, security and other large loads are evaluated together. The result determines whether the existing service is adequate or whether a larger service or load-management strategy should be studied.
There is no universal estate service size. Depending on the calculated demand, future loads, utility availability and distribution strategy, a project may use 320A, 400A, 600A, 800A, 1000A+ or another engineered configuration.
PG&E currently directs new and upgraded electric-service applications through its Your Projects portal. The application is reviewed with project details and required documentation, and PG&E assigns a representative to guide the utility-side process. Regent5 can prepare and coordinate the electrical information needed for the project.
The Greenbook is PG&E's published electric and gas service requirements manual for new and remodeled properties. The current 2026 edition covers service requirements that affect equipment, routing and construction details, so the project must be coordinated against the applicable utility standards rather than treated as an ordinary panel swap.
Timing varies with project complexity and the utility's workload. A project that requires transformer work, underground facilities, easements or additional engineering can take longer than a straightforward service change. Regent5 sets schedule expectations from the actual utility response rather than promising a generic duration.
Sometimes. Managed EV charging, batteries and other controllable loads can reduce peak demand, but the decision must be based on the real load calculation, equipment requirements, code and utility rules. For some estates, a larger service remains the cleaner long-term solution.
Possibly, but availability and need must both be established. Three-phase service is typically considered when equipment loads justify it and the serving utility can support it at the property. Regent5 evaluates the electrical requirement first, then coordinates the utility question rather than assuming three-phase is the better choice.
Yes. The main service, critical-load strategy, transfer equipment, battery capacity, generator interfaces, solar and EV charging all affect one another. Coordinating them together produces a clearer distribution and backup-power design and reduces later rework.
No. Palo Alto is served by City of Palo Alto Utilities, whose electric-service requirements and application process differ from PG&E's. Regent5 plans the project around the actual serving utility and local permitting requirements.
As early as practical in design development. Service size, meter and switchgear locations, transformer needs, trench routes, easements and major electrical loads can affect architecture, site work and construction sequencing. Early coordination gives the design team time to resolve those constraints before they become field changes.
Yes. The scope can include utility service routing, conduit and trench planning, transformer or vault conditions, meter paths, site and landscape interfaces, and coordination with the utility, civil team, GC and local authority. Final responsibilities depend on the utility's design and the project delivery method.
Yes. Regent5 can deliver the electrical upgrade as a coordinated design-build scope or provide the planning and utility-coordination layer while working with the project's existing electrician, engineer, energy vendors, architect, builder and owner's representative.
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