Owners rebuilding in Pacific Palisades often ask the same thing at the first lot visit: if we are building a house anyway, should we build a second one beside it? ADU construction on a rebuild lot is a different job from adding a unit behind a finished house. The ground is open, the utilities are being run again from the street, and both buildings can be drawn on one site plan from the first day.
That makes this the moment to price it. Once the main foundation is poured and the yard is graded, the cheapest version of the second unit is gone.
Send your lot address, a rough idea of the size you want and who the unit is for to ask for a written quote on the ADU and the main house together. We reply with a time to walk the lot.
A second unit planned with the main house
On a standing property, an ADU is fitted around what is already there: a driveway, a garage, old sewer and water lines, a yard someone has to dig up. On a cleared Pacific Palisades lot, none of that is fixed yet. We can place the unit where it shares a trench with the main house, where it keeps clear of the setbacks the survey shows, and where it leaves room for trucks and crews during the larger build.
There is also a question of order. Some owners want the ADU finished first, so the family can move back onto the property while the main house goes up. Others want both on one schedule, with the small unit closing in alongside the large one. Each order changes the budget and the timeline, and we price both if you are undecided.
Our ADU construction service carries the unit from plans to final. Our fire rebuild service carries the main house. On a shared lot, they run as one project under one written scope.
What sets the price of an ADU on a rebuild lot
Four things move the number more than finish choices do.
Detached or attached. A detached unit is its own small house: its own foundation, four exterior walls, its own roof. An attached unit shares a wall and sometimes a roof line with the main house, so some of that structure is already being paid for. Attached can cost less to build. It also ties the unit's design and permit to the main house, which changes the schedule.
Size. Square footage drives the frame, the roof, the slab and the finish count. A studio with a kitchenette and one bath is a very different line from a two-bedroom unit with a full kitchen and laundry. We price the size you are leaning toward and one size smaller, so you can see what the extra room adds.
Shared trenching and utilities. Two dwellings draw on one set of services. The electrical panel, the sewer lateral and the water line all have to be sized for both. On a cleared lot, those runs can go in one trench before either foundation is poured. That shared work is one of the largest savings a rebuild ADU has over one added later, and it shows on the quote as separate lines.
The permit path. The review this unit goes through is set at the building department. Building the ADU alongside the main house, ahead of it, or attached to it can each put it on a different path. We confirm the path for your parcel before the drawings are final.
For qualifying small one-story units, a plans package is available for the permit drawings. We check whether your lot and design qualify before you commit to it. Agency fees and the build itself are priced on their own after the site visit.
Choices that change the scope
Some decisions move the quote more than others. We settle these early, in writing, because they set the footprint and the utility sizing.
- Who lives in it. A parent, a grown child, a renter or your own family during the rebuild. Each points to a different layout and a different level of finish.
- Kitchen and laundry. A full kitchen adds plumbing, venting and electrical load. Laundry adds a dryer circuit and a drain.
- Shared wall, yard or driveway. Privacy between the two buildings shapes where the doors and windows go, and that can move the unit on the lot.
- Fire hazard rules. Parts of Pacific Palisades sit in a mapped fire hazard area. Where your lot does, the ADU gets the same ember-resistant vents, roofing, siding and glazing as the main house, and we draw them in from the start.
- A second story later. If you might want to build up, the foundation and frame have to be sized for it now.
How the lot visit and written quote work
We meet you at the lot and walk it with the survey if you have one. We look at where the old utilities came in, how the ground slopes, and where each building could sit. We talk through who the unit is for and the order you want the work in.
Then we write one quote with two clear parts. The main house has its own lines. The ADU has its own lines. Shared work, such as the trench, the utility upgrades and site preparation, sits in its own group, so you can see what the second unit adds and what it saves. If an insurance scope covers the main house, the ADU lines stay apart from it so nothing gets mixed into your claim.
What to have ready
- The lot address and a time we can meet there.
- Any survey, soils report or old plans for the property.
- A rough size for the unit and how many bedrooms it needs.
- Who will live in it, and whether it should be done before the main house.
- Your insurer's scope for the main house, if you have it.
Price the second unit with the rebuild
A rebuild is the one point when an ADU can share the work of the main house instead of undoing it. We are based in Pacific Palisades and plan both buildings together from the first site plan. Call us, or send the lot address through the form, and we will set a time to walk the site.