Mustang ADU

1 Bed
1 Bath
600 sqft
attached
Testimonial video
Gallery image
Gallery image
View gallery
View All
Jennifer

Jennifer

HOMEOWNER

Jennifer

Jennifer

HOMEOWNER

After my father passed away, we knew we wanted my mother closer to the family. She made it clear: I want my own space. I want my own kitchen. I want my own area. Building an ADU became the perfect solution.

Building an ADU became the perfect solution.

From the very beginning, I noticed Backyard Estates’ professionalism. When I met Adam and Tom, they pulled up my house, walked me through placement options, and showed me what was possible. When they presented the concept, I immediately said, That’s it—that’s exactly what I was envisioning.

When they presented the concept, I immediately said, That’s it—that’s exactly what I was envisioning.

I’ve been in real estate and construction for over 20 years, so I know how most construction companies operate. I expected communication gaps, delays, and stalls. Instead, the opposite happened. The total construction phase was less than 10–12 weeks, which is incredibly fast for a project like this.

The total construction phase was less than 10–12 weeks

The process was seamless. Every Friday, like clockwork, I received a detailed professional update outlining exactly what had been completed and what was coming next. I was always informed and always in the loop.

Every Friday, like clockwork, I received a detailed professional update

Most importantly, I felt completely at ease. I could literally sit back and know that all of the details were being handled. I had nothing to worry about—and that is priceless.

I could literally sit back and know that all of the details were being handled. I had nothing to worry about—and that is priceless.

Now, I’m looking forward to the day my mom moves in and sees her new home. Knowing she’ll have her independence while being surrounded by family brings me so much peace. Seeing the happiness on her face in her own space is going to bring me incredible joy.

ADU DesignArchitectural PlansStructural EngineeringTitle 24Civil EngineeringPlan Check FeesBuilding & Fire FeesWater & City FeesNotarizationCounty RecordingAgency CoordinationZoning VerificationProject ManagementCity InspectionsCertificate of OccupancyTurn-Key ConstructionPremium FinishesUtility ConnectionsWeekly UpdatesFinancingExterior DesignInterior DesignPre-ConstructionFinal WalkthroughWarranty SupportADU DesignArchitectural PlansStructural EngineeringTitle 24Civil EngineeringPlan Check FeesBuilding & Fire FeesWater & City FeesNotarizationCounty RecordingAgency CoordinationZoning VerificationProject ManagementCity InspectionsCertificate of OccupancyTurn-Key ConstructionPremium FinishesUtility ConnectionsWeekly UpdatesFinancingExterior DesignInterior DesignPre-ConstructionFinal WalkthroughWarranty Support

Designed to feel like home.

Mustang started as our Estate 600 and was customized for this home.

Project Timeline Overview

0 weeks

Plans

0 weeks

Permits

0 weeks

Construction
Week 1
Site Prep & Groundwork
Site Prep & Groundwork
Week 2
Foundation & Footings
Foundation & Footings
Week 3
Framing & Rough-Ins
Framing & Rough-Ins
Week 4
Windows, Doors & Exterior Shell
Windows, Doors & Exterior Shell
Week 5
Insulation & Drywall
Insulation & Drywall
Week 6
Interior & Exterior Finish
Interior & Exterior Finish
Week 7
Cabinets & Countertops
Cabinets & Countertops
Week 8
Interior Touch-ups & Final Inspection
Interior Touch-ups & Final Inspection

Site work on this lot

No surprises. Here’s why.

Our Formal Property Analysis found all of this before they signed.

Step 1 of 2

Found before we started

Our architect and engineers checked this lot before we designed anything. Finding these early is how we avoid surprises during the build.

Attached to the house: Opening the house wall at another ADU we built

Opening the house wall at another ADU we built

Attached to the house

What we found during the FPA
The ADU attaches to the main house.
How finding it early helped
Planning the connection early let us design the shared wall, roofline and fire separation together.
What it meant for this homeowner
Two homes that look like one outside and stay safely separate inside.
Longer utility runs (21 feet): Utility lines in the trench at one of our jobs

Utility lines in the trench at one of our jobs

Longer utility runs (21 feet)

What we found during the FPA
Sewer, water and power lines had to run farther than usual.
How finding it early helped
We mapped the route and checked the sewer’s slope over that distance, then sized the pipe and wire for the length.
What it meant for this homeowner
The yard was dug once, and every line works the way it was planned.
Electrical load calculations: The existing panel, at the FPA site visit, Jul 14, 2025

The existing panel, at the FPA site visit, Jul 14, 2025

Electrical load calculations

What we found during the FPA
The electrical panel had to power two homes.
How finding it early helped
Our load calculation showed what the panel could carry, so any upgrade and the utility’s scheduling started early, not after the walls went up.
What it meant for this homeowner
Power for both homes from day one, with no wait on the utility.
Fire flow test: A fire hydrant at one of our jobs

A fire hydrant at one of our jobs

Fire flow test

What we found during the FPA
The fire department needed a flow test of the nearest hydrant.
How finding it early helped
The result tells us right away if the fire department will require sprinklers, which changes the water line, the ceilings and the permit. So all of it was settled before the design.
What it meant for this homeowner
Plans that met the fire department’s rules from day one, with no late redesign.
Fire sprinklers: Sprinkler lines in another ADU we built

Sprinkler lines in another ADU we built

Fire sprinklers

What we found during the FPA
The fire department required sprinklers in the ADU.
How finding it early helped
Planning sprinklers from day one meant the water line, meter and ceilings were sized for them, and the fire department reviewed one complete design.
What it meant for this homeowner
No redesign after approval, and sprinklers that fit cleanly into the finished rooms.
Higher foundation: Pouring the foundation, Nov 13, 2025

Pouring the foundation, Nov 13, 2025

Higher foundation

What we found during the FPA
The ground called for taller or deeper footings.
How finding it early helped
Knowing the soil and slope up front, we set the footing depth and floor height in the plans, with steps and drainage that work with them.
What it meant for this homeowner
A level, solid foundation, with steps and drainage that fit the lot.
  • Drainage lines: An area drain beside another ADU we built

    An area drain beside another ADU we built

    Drainage lines

    Drain lines and grading that carry rainwater away from both homes.

  • Pool equipment moved: The pool equipment in its new spot beside the ADU, Dec 4, 2025

    The pool equipment in its new spot beside the ADU, Dec 4, 2025

    Pool equipment moved

  • Small tree removed: Removing a tree at one of our jobs

    Removing a tree at one of our jobs

    Small tree removed

    Trees and old yard items cleared for the ADU.

  • Block wall taken down and hauled away: Rebuilding a block wall at one of our jobs

    Rebuilding a block wall at one of our jobs

    Block wall taken down and hauled away

    An existing wall taken down for the build.

  • Main water valve moved

City permits and fees

Already included in every price, in every city we build in.

StepWho we work withFees we pay
Plan reviewPlanning, Building, Engineering, City / County Fire, CA ADU LawPlan-check, fire, corrections review, state compliance
UtilitiesPublic Works, Water, Electric Provider, WasteWater, sewer and electric connection and capacity
PermitSchool Districts, RecorderSchool, address, notarization, building, permit pull
InspectionsBuildingInspection

Added for this lot

  • SurveyA licensed survey of the lot’s lines and levels, so the plans sit exactly where they should.

Step 2 of 2

Finished to match the house

So the ADU looks like it belongs with the house.

The finished ADU
  • Tile roofTile to match the house, on a roof built to hold it.
  • SidingThe same style as the house, so they look like a set.
  • TrimThe same window and door trim as the house.

Plus the upgrades they chose

  • 12-foot ceilingsTaller ceilings for more open rooms.
  • Taller windows and doors
  • Roll-in tile showerA custom tile shower.

Our team

Your team, from first visit to move-in.

One team. Every step.

  1. Plan

    • Serge MayerHead ArchitectWalks your lot and draws your plans. Civil engineering and surveying background.
  2. Permits

    • Mary CoonDirector of OperationsKeeps every step moving: permits, schedule, people.
    • Elsa TomasProject AdminYour updates and documents, in one place.
  3. Build

    • Tom GibsonDirector of Construction50+ years building. Sets how every ADU gets built.
    • Dusty GravattSenior Construction Mgr.Runs the job site and the crews.
    • Jose CervantesProject ManagerRuns your schedule from permit to move-in.
  4. Every step

    • Adam StewartPresident & FounderStands behind every build.
    • Edgar CureMarketing & Tech Mgr.Builds the tools that show you every number.

Formal Property Analysis (FPA)

Your lot has its own requirements. Find them before you build.

For Mustang, our architect and engineers checked 250+ things before anything was designed.

Mustang’s FPA250+ checks
  • Distance to the house and lot linesShared wall and roof designed as oneFound
  • Soil and foundationFooting depth set in the plansFound
  • Utility run lengthsRouted and sized before any diggingFound
  • Electrical panel sizePower for both homes, planned earlyFound
  • Fire department rulesFire rules met in the first designFound

Also checked

  • Zoning and setbacks
  • Height and size limits
  • Slope and drainage
  • Sewer line condition
  • Water meter size

And 240+ more on every lot

  • What your lot needs
  • A buildable solution
  • A proposal with no surprises
Book your FPA

$500, fully credited toward your build

Not ready? Start with a free office visit

Finishes in this home

Designed with purpose, finished with care.

Every finish and fixture is selected with intention.

  • Luxury Vinyl Plank - Fox Hound

    Flooring

    Fox Hound

  • Shaker Cabinets - Espresso

    Cabinets

    Espresso

  • Cabinet Pulls - Satin Nickel

    Hardware

    Satin Nickel

  • Kitchen Faucet - Satin Nickel

    Kitchen faucet

    Satin Nickel

Projects with a similar approach

A selection of ADUs shaped by thoughtful planning, refined details, and spaces designed to live well.