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Portola

North Coast Packaged Homes
900 SF
(large)
2
1
  • Site-built
This plan is designed to be the perfect ADU. Unlike many small homes, it provides space for all utilities with the main area having a vaulted ceiling. A covered porch for outdoor seating.

Basic details

Square-Footage

900 SF

Inside wall to inside wall measurements.

Plan Type

site-built-panelized

Bedrooms

2

bathrooms

1
The Portola plan is one of our many pre-engineered plans designed to be built using our framing packages. Factory built framing packages are higher quality, economical and a more efficient stick-built product than on-site framing. The pre-engineered plans that can be easily modified to meet the needs and style of the client, the site and the County including exterior finish, window style, roof pitch and adapting for a sloped site. The Portola with two bedrooms, a full bath and kitchen and open floor plan and a covered porch offers space for multiple people or a home office. The plan can be easily adapted to 749 SF when this size offers an advantage for costs and to meet the licensing fees for some jurisdictions. The plan can be designed for either a slab or perimeter foundation and can be modified to a one bedroom to accommodate the individual’s needs. Using a framing package or panelized walls and manufactured trusses for a traditional custom stick-built home is a unique method to have a weathered in shell in days rather than months. It provides the framing for a custom home quickly, efficiently, and economically while affording complete customization of the interiors and the style of the home for the homeowner and any design requirements. • Higher custom quality than on-site framing • Reduced need for on-site labor • Time savings result in cost savings • Cleaner site provides safer work environment • Reduced time for inclement weather • Complete design flexibility • Perfect for the owner/contractor, DIY home builder or general contractor • Higher quality at a better price

Pre-reviewed jurisdictions

“Pre-reviewed” Plans

These are both site-built and prefabricated plans that have been pre-reviewed for compliance with applicable building code requirements. It is crucial that you begin by first contacting your local jurisdiction to understand what is and is not possible on your site before you proceed with selecting a plan. You should also ask your jurisdiction about their policy for use of pre-reviewed plans, as each individual city and county is unique. 


NOTE: A pre-reviewed plan will require additional information and tailoring before it can be submitted to your jurisdiction for ADU permit approval. See FAQs page for more details.

  • What does "pre-reviewed" mean?

Click each jurisdiction to access their ADU webpage and/or resources.

This plan has not been pre-reviewed by any participating jurisdictions. But that’s okay! You can still use it. It will just need to go through their standard review process.

NOTE: This program is currently in beta launch and we’re working on adding more “pre-reviewed” plans. Check back often for updates!

IMPORTANT: Even “pre-reviewed” plans must be submitted along with additional project-specific information for final review and permit approval by your jurisdiction’s building department.

Features

Click or hover each item for a description. 

All the appliances and HVAC are electric instead of natural gas.

  • All electric

A range of strategies to minimize the energy consumption, such as LED lighting, efficient HVAC systems, and well-insulated walls and ceilings.

  • Energy-efficient

A design that provides outdoor amenities such as a patio or deck.

  • Indoor/outdoor living

A design that includes features and details that make it accessible and functional to all people regardless of age, disability, or other factors.

  • Universal design elements

An ADU with a dedicated space and hookups for a washer and dryer.

  • In-unit washer/dryer

A design suitable for areas, such as the wildland-urban interface (WUI), or other areas of high wildfire danger.

  • Fire-resistive construction (Ch. 7A Compliant)

Images

Click the images to open a slideshow.

Gallery Floorplans

Floorplan variations

This plan can be modified to fit your site, needs and style of your home. As each plan is drawn uniquely modifications can include: • Size • Ceiling height • Exterior finish • Interior walls • Window style and size • Roof pitch • Slab or perimeter foundation • Door size and style • Sloped site • Flood zone • High fire

Cost Information

License fee:

$0

The license fee is what the designer will charge you to use their plan.

Contact the designer to move forward with this plan. 

Estimated construction cost

Exact costs vary based on site conditions, supply costs, labor costs, etc.

The current cost of construction of an ADU using one of our framing packages for a level lot with a standard perimeter foundation with modest finishes is about $400 sf. This includes the framing package but excluding permit and professional fees, utilities, and site work.

Professional fee

The rate or cost the designer will charge to complete the plan for your specific parcel and project.

A two-hour consultation is offered for free. Modifications to the plans are $60 per hour for engineering, $135 for engineering. Adding WUI notes is $180. Additional engineering for pier and grade beam foundation and retaining walls.

Other estimated expenses

Not included in the permit set is the site plan, energy calcs ($450), PV design (deferred submittal) and CalGreen Checklist.

Additional Information

If the designer supplied any additional information about this design, it is included below.

Using a framing package is a unique way to build a custom home of any size. And we can create a framing package for any design and set of engineered drawings.

Build this adu

1. Schedule an ADU feasibility consult to get started

Check what types of ADUs you can build on your property and get support with project planning, determining potential costs, and more from the Napa Sonoma ADU Center.
This link takes you to the Napa Sonoma ADU Center website
Get Started

2. Contact the designer

To move forward with this plan, contact the designer using the information included at the link below.
Contact the designer

Email this listing

Send an email to yourself (or someone else) with a link to this listing. You can also add notes about the listing. 

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This is our beta launch. Please check back for:

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CONTACTING THE DESIGNER

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Terms & Conditions

Please read these Terms & Conditions (“Terms”) carefully before contacting the Accessory Dwelling Unit (“ADU”) designer or firm and potentially proceeding with the purchase (licensing) of an ADU plan, as it contains important information regarding limitations of liability.

Your use of the ADU Plan Gallery found at www.plans.napasonomaadu.org (“Gallery Page”) to access designer contact information is conditional upon your acceptance of and compliance with these Terms.

By using the Gallery Page to obtain designer contact information, you agree to be bound by these Terms. If you disagree with any part of these Terms, then you do not have permission to use the Gallery Page to obtain designer contact information.

1 – Approval Authority. Your local jurisdiction’s building department has final review and approval authority for any ADU construction drawings and related permit application materials.

2 – Confirming Site Suitability Prior to Plan Purchase. It is your responsibility to understand what may or may not be allowed on your property by consulting with your local jurisdiction about requirements, regulations and limitations prior to purchasing an ADU plan.

3 – Plan Ownership and Responsibility. Any plans you purchase are the property of the ADU designer or firm that developed them, and use of those plans are subject to any copyrights, conditions, requirements or limitations established by the designer or firm.

4 – Liability from Plan Purchase and Use. Any liability or legal action arising from your engagement with a designer or ADU firm or from the purchase and use of their plan shall be governed by the contract you sign with that designer or firm. Napa Sonoma ADU Center, Napa Valley Community Foundation and Baird+Driskell Community Planning, who developed and manage the Gallery Page, are in no way a party to that contract or in any way, shape or form liable for your use of the plan and resulting ADU.

5 – “Pre-Review” Status. Napa Sonoma ADU Center, Napa Valley Community Foundation, and Baird+Driskell Community Planning, acting as their contractor, engaged a third-party reviewer, BPR Consulting Group, to review some of the plans featured on the Gallery Page for compliance with applicable building codes. The letter reflecting BPR Consulting Group’s review and conclusions is provided on the site as a courtesy and represents BPR Consulting Group’s professional judgment based on the information provided to them by the relevant designer or ADU firm. Napa Sonoma ADU Center, Napa Valley Community Foundation and Baird+Driskell Community Planning do not warrant for the accuracy of the review and are in no way responsible or liable for their work. Further, Napa Sonoma ADU Center, Napa Valley Community Foundation and Baird+Driskell Community Planning do not claim or represent that BPR’s review letter has any authority in the review and approval process with any specific jurisdiction.

6 – Hold Harmless. Napa Sonoma ADU Center, Napa Valley Community Foundation, and Baird+Driskell Community Planning have created this Gallery Page as a service to help property owners search for ADU plans that may meet their needs and connect them with the ADU designer or firm that developed and owns those plans. Napa Sonoma ADU Center, Napa Valley Community Foundation and Baird+Driskell Community Planning in no way warrant or are liable for the quality, constructability or safety of any plan featured on the site or for any financial or legal issues resulting from a property owner’s engagement with a designer or firm located through use of the Gallery Page.

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This limitation of liability reflects the allocation of risk between you and us. The limitation specified in this section will survive and apply even if any limited remedy specified in these Terms is found to have failed of its essential purpose. The limitations of liability provided in these Terms inure to the benefit of Napa Sonoma ADU Center, Napa Valley Community Foundation, and Baird+Driskell Community Planning.

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Our failure to enforce any right or provision of these Terms will not be considered a waiver of that right or provision. If any provision of these Terms is held to be invalid or unenforceable by a court, the remaining provisions of these Terms will remain in effect. These Terms constitute the entire agreement between you and us regarding the Gallery Page, and supersede and replace any prior agreements we might have had with you regarding the Gallery Page.

Any controversy or claim arising out of or relating to these Terms including but not limited to the interpretation or breach thereof shall be resolved in a court of competent jurisdiction in Napa County, California.

You and Napa Sonoma ADU Center, Napa Valley Community Foundation, and Baird+Driskell Community Planning agree that each may bring claims against the other only in your or its individual capacity and not as a plaintiff or class member in any class or representative action.

11 - Changes to Terms. We reserve the right to make changes to these Terms at any time.

We will notify you of making any changes to these Terms by posting the updated terms of service to this Website.

CONTACTING THE DESIGNER

To move forward with this plan, please contact the designer using the information below.

Plan name:

Portola

Designer:

North Coast Packaged Homes

Email address:

ann@northcoastpackagedhomes.com

Other contact information:

707 328-3192

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Send an email to yourself (or someone else) with a link to this listing and designer contact information. You can also add notes about the listing.