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prime work construction

Room Addition / ADU

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Room Additions in The Bay Area

Welcome to Primework Construction, your go-to experts for room additions and ADU (Accessory Dwelling Unit) construction. With over four decades of experience in the construction industry, our legacy is built on extending and enhancing homes to meet the evolving needs of homeowners. We specialize in transforming spaces, adding both value and functionality to your property with our bespoke room additions and ADU services.

If your home feels cramped or you’re dreaming of a dedicated space for guests, a home office, or even a rental unit, our skilled team of designers and certified builders is ready to bring your vision to life. We offer comprehensive custom solutions for both room additions and ADU projects, from the initial concept to the final touches.

Our approach is deeply collaborative. We prioritize your ideas and specifications, ensuring every aspect of the project reflects your lifestyle and preferences. Leveraging the latest in 3D modeling technology, we provide a virtual blueprint of your addition, allowing for real-time adjustments and ensuring your complete satisfaction with the proposed design.

Choose Primework Construction for your room addition or ADU project and experience the seamless blend of functionality, style, and personalized service that has made us an industry leader. Let us help you expand your home’s possibilities.

Prime Work Construction
bay area remodeling company

Remodeling & Renovation in the Bay Area

The Necessary Step For Success

Our Plan Of Work For Room Additions/ ADU Projects

At Primework Construction, we recognize that a full-scale renovation might not suit everyone’s needs or timelines. For those looking to expand their living space without committing to a comprehensive overhaul, we provide targeted room addition and ADU (Accessory Dwelling Unit) installation services.

These options are perfect for homeowners seeking to enhance their property with minimal disruption, adding both functionality and value to your home in a more focused manner.

Research and Planning

Determine your needs and goals for the additional space.
Research local zoning laws, building codes, and permit requirements for room additions or ADUs in your area.
Consider the size, layout, and style of the new space.

Research and Planning_

Design Phase

Working closely with the architect to create detailed plans for the addition or ADU.
Work with the architect to develop a floor plan that meets your needs and complies with local regulations, finish materials budgeting and selection.
Consider factors like natural light, ventilation, energy efficiency, and accessibility.

Design Phase

Engineer Phase

Structural Analysis and Design:
– Design structural elements, including foundations, beams, columns, and walls, to ensure
stability and safety.
– Design exterior walls, roof systems, foundation system structural requirements, and local
building codes. Insulation to optimize energy efficiency, thermal performance, and moisture control.
Mechanical, Electrical, Plumbing:
– Design MEP systems, including heating, ventilation, air conditioning (HVAC), electrical
wiring, plumbing, and drainage.
– Ensure compliance with building codes, energy efficiency standards, and occupant comfort
Sustainable Design Integration:
– Integrate sustainable design principles such as passive solar heating, natural ventilation, and
high-efficiency fixtures to minimize environmental impact and reduce operating costs.


Obtain necessary permits from the local building department before starting construction. – Submit your architectural plans and other required documents for review and approval.


– Footings and foundation work.
– Frame new walls, floors, and roof according to the plans.
– Building Envelope:
– Install exterior walls, roof, windows, and doors. – Ensure proper insulation.
– MEP Systems Installation:
– Install HVAC, electrical wiring, plumbing, and drainage systems. – Ensure compliance with building codes and regulations.
– Interior Finishes:
– Install drywall, flooring, trim, and paint.
– Install fixtures and appliances.
– Interior work such as kitchen, bathrooms, bedrooms etc.
– Exterior Finishes:
– Install siding, trim, and exterior finishes.
– Complete landscaping and hardscaping as necessary.
– Inspections:
– Schedule and pass required inspections at various stages of construction.
– Final Touches:
– Conduct final walkthrough and address any remaining issues. – Obtain Certificate of Occupancy.

Final Inspection and Approval

– Final inspection to ensure that the addition or ADU meets all building codes and regulations. – Obtain a Certificate of Occupancy or other final approval from the local building department. – Consider any additional steps needed for furnishing, decorating, and making the space
functional for your needs.
Once the addition or ADU is approved, move in and enjoy your new space!

A Look at Our Work

We invite you to explore our inspiration gallery and previous bathroom renovations.

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