Holiday Party Venue in Costa Mesa

Your company holiday party does not have to happen in a hotel ballroom with a carpet pattern. At Casa de Onda it happens on an open air patio under the palms, on the second level of Triangle Square in Costa Mesa, with a scratch made Mexican American fusion kitchen and a craft cocktail bar attached to it.

As a holiday party venue in Costa Mesa we take groups from small team dinners up to 300 guests, and we build each night around the group in front of us rather than handing you a set menu and a floor plan.

Check your date and request a proposal

Choose a semi-private indoor space with its own bar, the open air patio, or a full venue buyout for up to 300 guests. Tell us your date, estimated guest count and the kind of event you have in mind, and we will check availability and put together a proposal.

Already know Casa? We can start with your proposal. If you have not visited, a complimentary walkthrough is available when you would like one.

Three ways to take the space

Inside

Most parties end up here. Guests arrive through the patio, which is the main entrance, so they are out in the open air first and walk through it to reach you. Inside is the semi-private space. It has its own bar, separate from the main bar out on the patio, and that bar can be held just for your party.

The open air patio

Palms, string lights and the thatched roof bar at one end. It is also the main entrance, so every guest walks through it on the way in. This is the one people remember. It works for standing receptions, long family style tables, or a mix of both, and it is genuinely open air rather than a covered terrace pretending to be one.

The full venue

The whole place, closed to the public, up to 300 guests. Patio, indoor space, both bars, the dance floor. For companies that want the night to be theirs from the door onward.

The food

Everything is scratch made. We serve holiday parties plated, family style, buffet, or as passed appetizers moving through the room, and we will tell you honestly which one suits your headcount and your timing. Taco bar buffets, multi course dinners, and custom chef specials are all on the table. Vegetarian options run through every package, and we handle dietary restrictions and allergies when we know about them in advance.

The bar

Full bar, and the margaritas do most of the talking. You can run an open bar for a set stretch of the night, hand out drink tickets, keep it on consumption, or add a champagne toast for the speech. We will walk you through which one tends to work for a group your size.

What we can do, and what we cannot

• DJs: yes, and they work well in this room
• Live bands and singers: no, we do not have the equipment or the licensing for it
• Your own cake: yes, with a cake cutting fee. Your baker just needs to coordinate the drop with us
• Outside alcohol: outside wine is welcome with a corkage fee. All other outside alcohol is prohibited at all times.
• Outside food: only with prior approval from management

Getting here, and parking

Casa de Onda is on the second level of Triangle Square at 1870 Harbor Blvd, Costa Mesa, CA 92627, right at the end of the 55 Freeway as it heads toward Newport Beach. Parking is free in the seven level covered structure, which matters more than you think in December when nobody wants to circle the block in the rain in good shoes.

Book earlier than you think you need to

November and December fill from the outside in. The Friday and Saturday nights go first, and they go earlier every year. If you have a date in mind it is worth calling now even if your headcount is still moving around, because we can hold a conversation long before you have to hold a number.

Common questions about our holiday party venue in Costa Mesa

How many people can you hold?

Up to 300 for a full venue buyout. Smaller groups take the inside space or a section of the patio, and we will point you at the right one once we know your number.

Can we have the whole place to ourselves?

Yes. A full buyout closes the restaurant to the public for your event.

What does it cost?

Pricing depends on your date, space, guest count, menu and bar selections. Send us those details and we will put together a proposal. A walkthrough is optional.

How far ahead should we book?

For November and December, as early as you can manage. The rest of the year a few weeks is usually plenty.

Can we bring a DJ?

Yes. DJs are welcome and this room is built for one. We do not accommodate live bands.

Can we bring our own alcohol?

Outside wine is welcome with a corkage fee. All other outside alcohol is prohibited at all times. We can help you choose a bar option for your group.

Where exactly are you?

Second level of Triangle Square, 1870 Harbor Blvd, Costa Mesa, CA 92627. Parking is free on site.

Let us plan your holiday party

Tell us your date and estimated guest count, or call us on (949) 612-2349. We will check availability and come back to you the same day.