Casita and Guest House Construction

A casita is the cheapest square metre you will ever add to a property — if the land use allows a second dwelling. That single check decides the whole project.

Check density before you design anything

The municipal land-use certificate states how many dwellings are permitted on the lot, along with ground coverage and floor area limits. A casita as a genuinely separate dwelling with its own kitchen may or may not be allowed; a guest suite without a full kitchen is treated differently in many cases. Inside a gated development, the internal rules often prohibit a second dwelling regardless of what the municipality permits. Verify both before spending money on drawings — this is where casita projects die.

Why the cost per m² is lower

The expensive parts of a house are the kitchen, the bathrooms, the services and the site work. A casita shares the site, the connections and often the pool with the main house, so the marginal cost of adding 40 to 60 m² is much lower than building the same area as a standalone home. That is what makes it the best-value expansion on most lots — and why it is often the first thing we suggest to owners who think they need to sell and move.

Sizing it to be genuinely useful

Around 35 to 45 m² gives a studio that works: sleeping area, decent bathroom, kitchenette, and a covered outdoor space that makes it feel larger than it is. Around 55 to 70 m² gives a real one-bedroom. Below 30 m² it starts to feel like a hotel room, which limits both guest satisfaction and rental appeal. Give it its own entrance and some acoustic separation from the main house — privacy is the entire value proposition, for family and for guests alike.

Costs in 2026

Ranges for a casita built alongside an existing house in the Riviera Maya, including its own bathroom and kitchenette, sharing connections with the main property.

Renting it out: the honest arithmetic

A well-built casita in a good location can rent, and because the marginal construction cost is low, the return on that increment is usually better than on the main house. But it changes how you live: guests on your lot, cleaning turnovers, and management. It also has to comply — separate access, safety, and whatever registration and taxation apply to short-term rental in your municipality. Decide whether you want that before you build, not after the first booking.

Related pages: Furnishing a vacation rental · Land use, density, COS and CUS · Is Tulum a good investment? · Concierge construction service

Frequently Asked Questions