Who we are

Built for
California
Compliance.

MWELO.com was built by landscape professionals who got tired of doing the same compliance math manually, project after project. The Model Water Efficient Landscape Ordinance is mandatory — the paperwork shouldn't be painful.

The problem we solve

MWELO Is Required.
The Math Is Tedious.

Any new construction, ADU, major renovation, pool installation, or turf conversion over 500 sq ft of irrigated area in California requires a MWELO compliance document before a building permit is issued.

That document requires you to look up WUCOLS plant data, pull ETo figures for your specific address, assign hydrozones, calculate ETAF and ETWU for each zone, and verify your design stays under the MAWA. For every single project.

MWELO.com does all of it. You enter the plants and areas. We handle the calculations and produce the worksheet your plan checker needs.

MAWA
Maximum Applied Water Allowance
ETWU
Estimated Total Water Use
ETAF
Evapotranspiration Adjustment Factor
What sets us apart

Three things we do right.

01
Address-Specific ETo

We pull evapotranspiration data for the exact city of your project — not a regional average. Every California city has its own ETo and your water budget reflects that precisely.

02
Built-in WUCOLS Plant Selector

3,500+ plant species classified by water requirement across all six California regions. The selector shows only the plants rated for your project's region and applies each one's WUCOLS classification automatically — so there is no doubt about whether a plant choice is right for your location.

03
Permit-Ready Output

The worksheet we generate follows the layout of the official MWELO Water Efficient Landscape Worksheet. Not a summary — the document you include with your permit application.

Not valid for Santa Monica projects

Ready to Validate?

Your project includes three documents: the Water Efficiency Worksheet, a Plant Material Table, and a Certificate of Completion PDF pre-filled with your project address.

Get Started → Follow @mwelo_california