Detached ADUs in Palo Alto, CA

Why Detached Units Are What Most Palo Alto Homeowners Want

A detached ADU is a standalone building in the rear yard with its own entrance, kitchen, bathroom, and utilities. It is the most requested type we build, and the reason is simple: separation. Nobody walks past your kitchen window to get home, there is no shared wall to detail for sound, and the unit functions as a genuine second residence rather than an extension of yours.

That independence is what makes it the strongest option for a long term rental, for parents who want their own front door, and for adult children who are staying local but not moving back into a bedroom.

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What the Rear Yard Has to Give You

The whole question is whether the buildable area behind the house supports a unit worth building. On a Barron Park or Midtown lot with a deep rear yard, there is usually room. On a tighter Professorville or College Terrace parcel, the math gets harder once setbacks are applied.

Three things decide it. Rear and side setbacks establish the envelope. Lot coverage limits how much of the parcel can be built on in total, counting the house you already have. And protected trees, which Palo Alto takes seriously, can rule out an otherwise perfect corner of the yard because building inside a mature oak or redwood's root zone is not something you can design around after the fact.

We measure all three before drawing anything. Our ADU construction page covers how that assessment works.

The Work a Detached Unit Actually Requires

A standalone building is a complete construction project, which is the honest difference between it and a garage conversion. Everything gets built from the ground up.

A new foundation, sized to the soil conditions on your specific parcel
Full framing, roof structure, and weatherproofed exterior
Trenching from the house or the street for water, sewer, and electrical
A sewer connection that has to reach the existing lateral at workable slope
An electrical service capable of carrying a second dwelling, which commonly means a panel upgrade
Independent heating and cooling, insulation, and finishes throughout
Site work, drainage, and a path of travel from the street to the unit's entrance

The trenching is the item homeowners underestimate most. Distance from the main house, whatever is in the way, and the depth needed for sewer slope all move that number, which is why we walk the utility route during the site visit rather than estimating it from a drawing.

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Palo Alto Permits and City Utilities

State law requires ministerial review for compliant ADUs, so a detached unit that meets the standards is approved without a discretionary hearing. Palo Alto processes those permits through its own planning and building review, with submittal requirements and inspection scheduling that belong to the city.

Palo Alto also runs its own municipal utilities instead of being served by PG&E, so the new electric, water, and gas service for a detached unit is coordinated with the city utility department. On a detached build this matters more than on any other ADU type, because you are establishing service to a structure that has none. We build that coordination into the schedule from the start.

Sizing It for the Person Who Will Live There

A detached ADU is not just a small house, and the layouts that work are the ones designed around a specific use. A rental unit earns its keep with a real kitchen, a bedroom that takes a proper bed and a dresser, storage that means the tenant is not stacking boxes in the living area, and durable finishes that survive turnover.

A unit for aging parents is a different building. Curbless shower, wider doorways, no thresholds to catch a walker, lever handles, and lighting that works for someone whose vision has changed. Both fit in the same footprint. They are not the same design, and choosing between them at the drawing stage is far cheaper than retrofitting later. The value of an ADU depends heavily on getting that decision right early.

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One Contractor From Site Assessment to Final

We build detached ADUs as design build, so the team drawing the unit is the team constructing it. On a ground up building with new utilities, that continuity is worth real money. Soil conditions, the actual depth of the existing sewer lateral, and what is buried between the house and the yard are things you learn during construction, and they turn into decisions rather than disputes when one company owns both sides.

We are a licensed general contracting company based in San Jose, owner operated by Becir Molabecirovic, serving Palo Alto and the surrounding Santa Clara County cities. We keep our concurrent project count low on purpose. Our ADU contractor services page details what each phase includes.

Let Us Walk Your Palo Alto Rear Yard

The only way to know what a detached ADU costs on your property is to look at the yard, the utility route, and the trees. Get in touch with our team and we will give you a straight assessment.

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Frequently Asked Questions

How close to the property line can a detached ADU sit?

State law protects a modest rear and side setback for ADUs, which is more permissive than standard accessory structure rules. The exact envelope depends on your parcel, so we confirm it against your survey rather than a general figure.

Will a protected tree block the unit?

It can move it. Palo Alto protects mature trees, and building within the root zone of a heritage oak or redwood is generally not permitted. We locate protected trees during the site assessment and design the unit around them.

How long does a detached ADU take?

Longer than a conversion, because you are building a complete structure and running new utilities to it. Design and permitting run in parallel with nothing else, then construction proceeds continuously. We give you a schedule at contract and update it as plan check moves.

Do I need a separate address and meters?

An address is typical for a detached unit. Whether service is separately metered depends on how it is set up, and in Palo Alto that is a conversation with the city utility department that we handle as part of the project.

Can I build detached if I already have a JADU?

In many cases yes. State law generally allows a JADU within the home alongside a detached unit on the same single family lot. We confirm against your parcel's specifics before you plan around it.

Create Your Dream ADU Designed Just for You

Every ADU project starts with a site evaluation. We'll visit your property, take measurements, review setback requirements, and discuss your goals. From there, we'll recommend floor plans that make sense or start designing something custom if that's the better route.

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