Service area · Hollywood Hills
Room Additions in Hollywood Hills
The Hollywood Hills is the hardest place we build, and the reasons are stacked: severe slopes, narrow streets that complicate every delivery, some of the most restrictive hillside regulations in Los Angeles, and fire hazard designations that govern what the exterior can be made of. Additions here are entirely achievable — they just cannot be planned like flatland work.
Local conditions
What Hollywood Hills homes are built like
Housing here is genuinely heterogeneous: 1920s Spanish and storybook cottages on tiny hillside parcels, mid-century post-and-beam houses cantilevered over canyons, 1970s and 1980s contemporaries, and recent construction that maximizes every buildable inch. Lot shapes are irregular, street frontage is often minimal, and many houses are accessed by stairs from the road.
Two consequences dominate. First, existing structures were frequently built to standards and on foundations that current code would not permit, so an addition often triggers upgrades to what's already there. Second, the buildable envelope is usually far smaller than the lot suggests once slope analysis is applied.
Hollywood Hills at a glance
- Permitting authority
- Hollywood Hills properties fall under the City of Los Angeles, so plan check goes through LADBS. The Baseline Hillside Ordinance governs residential floor area, height and grading on hillside lots and is the single most important constraint on what you can build — it ties allowable floor area to lot size and slope in ways that surprise most owners. Portions of the area also fall under the Mulholland Scenic Parkway Specific Plan, and much of the hills sits in a very high fire hazard severity zone with corresponding construction requirements.
- Neighborhoods we work in
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- Laurel Canyon
- Nichols Canyon and the streets off Woodrow Wilson
- The Hollywood Heights area below the Bowl
- Beachwood Canyon and Hollywoodland
- The Mulholland corridor and its side streets
On the ground
Find out what you can build before you design it
On nearly every Hollywood Hills project, the first real deliverable isn't a floor plan — it's an analysis of what the hillside regulations actually permit on that parcel. Allowable floor area, height envelope, grading limits and setbacks come out of the lot's size and slope, and the answer is frequently smaller than the owner expected.
We do that analysis first, deliberately, because the alternative is paying for a design that can't be permitted. It's an unglamorous start to a project and it has saved our clients more money than anything else we do up here.
Most requested here
What we build most often in Hollywood Hills
Outdoor living spaces
Decks and terraces that turn a slope into the best room in the house
See details →Master suite additions
Usually built up or cantilevered where there's no level ground
See details →Custom room additions
Designed around the buildable envelope the hillside rules allow
See details →Straight answers
Hollywood Hills questions we get asked
What is the Baseline Hillside Ordinance and does it apply to me?
It's the City of Los Angeles regulation governing residential development on hillside lots, controlling maximum floor area, height and grading based on lot size and slope. If your property is in a designated hillside area, it applies and it will shape your project substantially. Determining your allowable floor area is the first thing we do.
How do you get materials to a house with no driveway?
Carefully and with it priced honestly. Depending on the site that means small equipment, staged deliveries timed to street conditions, hand-carrying up stairs, or a crane day. Access is a real line item on hills projects and any bid that treats it as incidental is going to grow.
What does the fire hazard zone designation require?
In very high fire hazard severity zones, exterior construction faces ignition-resistance requirements — roofing, siding, decking, eaves, and ember-resistant vents — along with defensible space obligations around the structure. It affects material selection and cost, and we identify your parcel's designation during planning.
Is it worth adding on up here rather than moving?
Frequently yes, because what you're paying for in the hills is the location and the view, and neither transfers. But the honest caveat is that hillside construction costs more per square foot than flatland work, so the calculation is different than it would be in the Valley. We'll give you a real number before you're committed.
Start here
Planning an addition in Hollywood Hills?
We'll come out, look at the house and the lot, tell you what Hollywood Hills's rules will actually allow, and put a written estimate in your hands. No charge and no obligation.
Call (626) 726-3989, or use the form and we'll get back to you — usually the same day.
We also serve: Pasadena, Glendale, Burbank, Beverly Hills, Sherman Oaks, Studio City, Woodland Hills, Northridge, Reseda, Santa Clarita, Thousand Oaks.
Free estimate in Hollywood Hills
Tell us about your project and we'll call you back — usually the same day.
Ready to talk about your addition?
Free in-home consultation and a written estimate at no cost.