Our ADU's (ACCESSORY DWELLING UNITS)

Our Floor Plans


Estimate Cost Per ADU Plan (including allowance for standard city/county fees, foundations, transportation, standard utility hook-ups, consulting fees,

Including Perpetual Homes Upgraded Standard Features plus tax on ADU. 

ADUs can range in size from 430 sf one bedroom one bath to three bedroom two bath 1,200 sq ft plans (ask us about three bedroom ADU options)

"All In" pricing starting in the mid $200,000s

*Architectural renderings subject to change

Piedmont Farmhouse Side and Front Elevations

WHAT ARE THEY AND WHY ARE THEY BECOMING SO
POPULAR?


An accessory dwelling unit (ADU) is simply a second small dwelling located on the same grounds as your regular single-family home. An ADU can be in the form of a small house, backyard retreat, or even a home office. ADU’s are oftentimes called granny flats, in-law units, tiny houses, or secondary dwelling units. In addition, many multi-family attached properties can add two detached ADU’s per property. ADU’s are appealing because they cost less than other forms of housing and make use of existing land.
accessory dwelling units | perpetual homes | Danville, CA

WHAT ARE THEY AND WHY ARE THEY BECOMING SO
POPULAR?


An accessory dwelling unit (ADU) is simply a second small dwelling located on the same grounds as your regular single-family home. An ADU can be in the form of a small house, backyard retreat, or even a home office. ADU’s are oftentimes called granny flats, in-law units, tiny houses, or secondary dwelling units. In addition, many multi-family attached properties can add two detached ADU’s per property. ADU’s are appealing because they cost less than other forms of housing and make use of existing land.
IN CALIFORNIA ADU’S ARE BECOMING EXTREMELY APPEALING FOR A NUMBER OF REASONS :
People build ADU’s for many reasons but the most common one is to provide housing for multi-generation family members or for gaining rental
income. In fact, Alamo ADU’s command approximately $3,600 per month.Th at is a 15% return on investment!
The cost of housing has increased so much that young families and aging parents are finding it difficult to be able to afford to live in this area. For aging parents, ADU’s allow for people to age in place or form multi-generational households to ease care giving responsibilities and cost.
ADU’s can be used as an incredible source of rental income. Some people rent out the ADU or even decide to downsize and live in the ADU while renting out their primary dwelling.

More companies are allowing their employees to work from home and

that can be extremely difficult with small children or pets present.  Office Shack  (prices start in the $30,000's) can provide that perfect  quiet retreat for someone that works from home.

New California laws have made adding an ADU more attractive than ever. Some of these new laws include:

1) Adjusts the minimum ADU height limit that a local agency may impose, as follows: a) For detached ADUs on a lot with an existing or proposed single family, a 16 feet height limitation is allowed. b) For detached ADUs on a lot with an existing or proposed multifamily dwelling unit, an 18 feet height limitation is allowed. c) For a detached ADU within one-half of one mile walking distance of a major transit stop or a high-quality transit corridor, an 18 feet height limitation is allowed. Also, requires that a local agency must allow an additional two feet in height to accommodate a roof pitch on an ADU that is aligned with the roof pitch of the primary dwelling unit; and d) For ADUs attached to the primary dwelling, a height of 25 feet or the height limitation in the local zoning ordinance that applies to the primary dwelling, whichever is lower, is allowed.

2) Clarifies the following: a) Standards imposed on ADUs must be objective. b) A permitting agency must act by specifically approving or denying an application for an ADU or JADU within 60 days from receiving. And, if a permitting agency denies an application, they must return in writing a full set of comments on how the application can be remedied. c) Any requirement for a zoning clearance or separate zoning review for either an attached or detached dwellings will be constructed in compliance with all other local building standards.

3) Prohibits a local agency from denying a permit for a constructed, unpermitted ADU built before January 1, 2018 for any of the following reasons: a) The ADU is in violation of building standards, but correction of the violation is not necessary to protect the health and safety of the public or occupants of the structure; and SB 897 Page 4 b) The ADU does not comply with state or local ADU law.

4) Provides that the construction of an ADU on a property does not trigger a requirement for fire sprinklers in the proposed or existing primary dwelling.

5) Provides that a local agency cannot require, as a condition for ministerial approval of a permit application for the creation of an ADU or a JADU, the correction of a violation on the primary dwelling unit, provided that correcting the violation is not necessary to protect health and safety

SB 897 LAWS

The presence of an ADU can enhance the attractiveness of a house on the  market, typically increasing the value of the property. The ADU units can be fully equipped with a bathroom, kitchen, heating and air conditioning, as well as washer and dryer making them fully functioning living spaces. Quite simply, an ADU can be the perfect solution for housing extended family, for gaining monthly rental income or for allowing people to simplify their lives and still live in a neighborhood setting.

The highly regarded ADU  builder, Perpetual Homes, specializes in providing affordable,sustainable, turn-key backyard ADU’s in the BayArea. Perpetual Home ADU’s  are placed on a engineered foundations. Assembled off -site to ensure the highest standards of quality, with minimal disruption to the homeowner, Perpetual Homes offers a huge array of floorplans/exterior design options, and dwelling sizes (that can range in size from the 117 sq ft office shack and ADU's ranging from one bedroom, one bath, all the way up to 3 bedrooms, two bath, 1,200 sq ft dwelling). 

Our Features

EXTERIOR 
  • LIGHT BODY PAINT COLOR 
  • SEMI-GLOSS EXTERIOR PAINT WITH COLOR DESIGN FEATURING HIGH QUALITY PPG® PAINT 
  • ( 2 ) EXTERIOR GFI PROTECTED PATIO OUTLETS (LOCATIONS VARY PER PLAN) 
  • CARRIAGE PORCH LIGHT 
  • 12" FRONT OVERHANG 
  • SIDEWALL EAVES PER PLAN (CONSTRUCTION MODIFICATIONS CAN AFFECT STANDARD EAVE DESIGN) 
  • SHUTTERS (PER PLAN) 
  • 6 " TRUEXTERIOR FASCIA & 6 " TRUEXTERIOR CORNER & WINDOW TRIM 
  • 36" ENTRY DOOR WITH DEADBOLT SECURITY LOCK 
  • 32" FIBERGLASS INSULATED REAR ENTRY DOOR WITH DEADBOLT SECURITY LOCK  
  • NAME BRAND FIBER-CEMENT EXTERIOR SIDING WITH MANUFACTURERS 25-YEAR LIMITED 
  • 25 YEAR SHINGLES (PER PLAN) 
  • WINDOW COVERINGS WITH FAUX WOOD BLINDS INCLUDED (PER PLAN) 
INTERIOR 
  • SELECT 5 ¼" CEILING CROWN MOLDING 
  • SHAKER BUTTERNUT CABINETS WITH FINGER PULLS 
  • USB RECEPTACLE IN KITCHEN AREA FOR EASY RECHARGING OF ELECTRICAL DEVICES 
  • 2 ¼" DOOR CASING 
  • 5 ¼" BASEBOARD 
  • LEVER HANDLES 
FLOORING COVERINGS 
  • MANTRA CARPET WITH 6 LB CARPET PAD (PER PLAN) 
  • "EASY CARE" CONGOLEUM® DIAMONDFLOR™ VINYL FLOORING (PER PLAN) 

LIGHTING 
  • DESIGNER-SELECTED LIGHTING IN DESIGNATED AREAS 
  • RECESSED LED LIGHTS IN KITCHEN, NOOK, HALLWAY, ABOVE LAVATORY SINK, ABOVE TUB/ SHOWER, & BEDROOM 2 (PER PLAN) 
  • CEILING FAN LIGHT (LIVING ROOM) 
  • VENT IN BATHROOMS

CONSTRUCTION & SPECIFICATIONS 

  • INCLUDES PLUS SIX-YEAR WARRANTY 
  • NOW ALSO INCLUDES STRUCTURAL COVERAGE! (DEDUCTIBLES APPLY, CLAIMS PROCESSED BY ASSURANT) 
  • 30 L B . ROOF LOAD 
  • INSULATION 
  • FLOOR R-22 
  • 2 x6 WALLS R-19 
  • CEILING R-19 
  • ALL STRUCTURAL LUMBER USED I S KILN-DRIED FOR HIGHER QUALITY
    2 " X 6 " TRANSVERSE FLOOR JOISTS - 1 6 " ON CENTER
  • WHITE VINYL FRAMED, DUAL GLAZED WINDOWS WITH LOW-E COATING FOR ENERGY SAVINGS ·WINDOWS ARE ENERGY STAR® RATED & APPROVED 
  • 100 AMP ELECTRICAL SERVICE 
  • ELECTRIC TANKLESS WATER HEATER 
  • 9 ' SIDEWALL WITH FLAT CEILINGS (VAULTED PER PLAN) 

 

KITCHEN 


 

  • UNDERMOUNT STAINLESS STEEL FARMHOUSE SINK 
  • WHIRLPOOL® STAINLESS STEEL FINISHED KITCHEN APPLIANCES 
  • 30" GAS FREESTANDING RANGE/SELF-CLEANING OVEN 
  • 18 CUBIC FOOT DOUBLE DOOR REFRIGERATOR 
  • MICROHOOD 
  • 4-CYCLE DISHWASHER 
  • GARBAGE DISPOSAL 
  • CHROME GOOSENECK SINGLE LEVER KITCHEN FAUCET 
  • KITCHEN ISLAND (PER PLAN) 
  • GRANITE/QUARTZ KITCHEN COUNTER TOPS WITH 6 " BACKSTOP (INCLUDING FULL HEIGHT BEHIND RANGE) 

 


WARRANTY 


 

  • PLUS SIX-YEAR EXTENDED WARRANTY 
  • ONE-YEAR SKYLINE LIMITED WARRANTY

 

BATH 
  • 60" ONE-PIECE FIBERGLASS TUB/SHOWER 
  • GRANITE OR QUARTZ COUNTERS WITH 6 " BACKSPLASH 
  • BEVELED-EDGE MIRRORED MEDICINE CABINET 
  • TOWEL BAR & PAPER HOLDER 
  • ELONGATED LOW-FLOW WATER SAVING TOILETS 
  • MBS® DUAL LEVER FAUCET WITH OVAL UNDERMOUNT LAVATORY SINK 
  • MBS® TUB/SHOWER, FAUCET FEATURING PRESSURE BALANCE VALVES 
  • CEILING VENTED EXHAUST FAN FLOORING COVERINGS 
UTILITY ROOM 
  • OPTIONAL WHIRLPOOL® WASHER/DRYER 
  • GAS DRYER HOOK-UP 

PERPETUAL "SMART CHOICE" OPTIONS FOR YOUR "SMART HOME" 
  • SOLAR TUBE SKYLIGHTS THAT ILLUMINATES HOME INTERIORS WITHOUT TURNING ON LIGHTING FIXTURES DURING DAYLIGHT HOURS, SAVING ENERGY 
  • PREP RACEWAYS FOR WALL MOUNT FLAT SCREEN TELEVISION 
  • AIR CONDITIONING 

OPTIONS (EXTERIOR) 
  • STUCCO AND TRUEXTERIOR SIDING 
  • TRUEXTERIOR FASCIA 
  • UPGRADED MODERN STUCCO AND FARM-STYLE WOOD ELEVATIONS (COMPLETED ON SITE) 
  • DOUBLE DOOR ENTRY (PER PLAN) 
  • DOORBELL 
  • MOTION SENSOR LIGHTS 

OPTIONS (INTERIOR) 

  • WASHER/DRYER  
  • LIGHTED BATHROOM MIRROR 

Estimating Total Costs INCLUDED

Every Backyard Site and Municipality Fees Vary a Bit

Base Prices Starting at Low $200,009

More on our 5-step Process Streamlined Manufacturing Method Innovative Proprietary Installation Process


Perpetual Homes ADU with upgraded included features including 9 foot ceilings, Permitting Plan, and Municipality Fees. (Allowance for $8,000 for architects and civil engineer plans & $20,000 for city/county and municipality fees in standard budget).


The good news is cities/counties aren't allow to charge impact fees on ADUs under 750 SF. This can provide over $40-50K+ in cost savings for these ADU fees in 2020 vs 2019. Most cities require a site survey to tie into your new ADU on your property title record legally, which we included in the standard budget. In addition, our civil engineer stakes the exact location of your ADU to match your legal boundary because it will become a permanent structure on your property.

Deposits:

  • Step One - $850 for initial site plan & due diligence
  • Step Two - Initial Permits, architectural and civil engineering submittal - $9,500
  • Step Three - Start of ADU construction 50%
  • Step Four - site preparation & permanent foundation - pay directly to our exclusive General Contractor
  • Step Four - ADU Delivery - Balance Due

Extra Costs:

  • Electrical Panel Upgrade: Most older homes won't have enough existing electrical panel capacity if they're under 200 AMPs. An upgrade will typically be required which we will access.
  • Foundation, Trenching & Craning: We have included our standard proprietary foundation as well as if trenching is required trending below 30 LF. This upgraded and solid foundation includes a concrete perimeter (Abesco) with concrete footings down the middle. If we need to crane the ADU into your backyard, we will provide you with the best estimate we can find.
  • Fire Sprinklers: If your main house has fire sprinklers, most municipalities will require fire sprinklers in the ADU. We will access to provide our findings.
  • Custom Exterior: We will access based on your choice of design.

 

What's Included?
 

  • Finished accessory dwelling unit with upgraded Perpetual Homes exterior and interior features (including 9 foot ceilings; granite or quartz; Laminate or carpet flooring- see our generous list of included features under floor plans)
  • Proprietary foundation - raised
  • Standard utilities - water, sewer, electrical and gas (if chosen)
  • Standard consultant fee budget and initial planning fees $9,500 
  • $20,000 allowance for city & municipality fees

 

What's Not Included?
 

  • Utility upgrades (if required for installation)
  • Excessive Permit fees - over $20,000 (if required - most ADUs will require; if less than 120 SF then typically no requirement)
  • Craning fees (if necessary due to limited access)
  • Customized Foundation
  • Decking
  • Upgraded Steps

 

List of how we build your home to green standards.
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