El Niño Is Coming. Is Your San Francisco Home Ready?

How should San Francisco homeowners prepare for El Niño? Start by clearing drains and gutters, checking bay windows for moisture, having the roof and back of the house inspected, and doing a walk-through after the first rain.

San Francisco homes have their own set of winter challenges. Many of our Victorians and Edwardians are more than a century old, garages often sit below street level, and lightwells collect leaves and water between neighboring buildings. On the west side, in the Richmond and the Sunset, the fog can keep back stairs and exterior wood damp long after the rain stops.

With El Niño strengthening this year, it’s a good time to take a closer look at those areas. It doesn’t guarantee a wet winter in San Francisco, but a little preparation can help keep small maintenance issues from becoming bigger repairs.

1. Clear Gutters, Downspouts, and Lightwell Drains

Have gutters and downspouts cleared, and remove leaves and debris from accessible drains in lightwells, patios, and exterior stairwells. If your garage sits below street level, as so many do in San Francisco, check the drain at the bottom of the driveway. Have any recurring backups or pooling assessed before the next storm.

2. Check Bay Windows for Leaks and Moisture

Bay windows are one of the things that make San Francisco homes so recognizable, but their corners, seams, and roof coverings deserve attention. Peeling paint, soft wood, or staining beneath a window can point to a problem worth investigating. Have a professional identify where moisture is entering before simply sealing or painting over it.

3. Inspect Flat Roofs, Back Decks, and Stairs

Flat and low-slope roofs are common across the city, so ask a roofer to inspect drains, flashing, and areas where water collects. Back decks, stairs, and the places they connect to the house also deserve a look, especially if you’ve noticed lingering dampness or deteriorating wood.

4. Do a Walk-Through After the First Rain

Check ceilings, window frames, garages, and ground-floor rooms for new stains, drips, or musty smells. Photograph anything unusual and note when it appeared. Those details can help a professional trace the source.

Frequently Asked Questions

Will El Niño bring a wet winter to San Francisco?
Forecasters expect a strong El Niño this winter, which often brings heavier rain to California, but it doesn’t guarantee a wet winter in San Francisco. Preparing now is the safest approach either way.

What are the most common rain problems in San Francisco homes?
Clogged lightwell and garage drains, moisture around bay windows, and water collecting on flat roofs and back stairs are some of the most common trouble spots, especially in older Victorian and Edwardian homes.

When should I prepare my San Francisco home for winter rain?
Before the first big storm. Roofers and contractors book up quickly once the rain starts, so scheduling inspections in the fall gives you time to address anything they find.

Who should I call to inspect my home before winter?
A roofer can inspect drains and flashing, and a contractor can assess windows, decks, and stairs. If you need a trusted local pro, our team is happy to share referrals.

Need a trusted local pro? Our team works with roofers, contractors, and tradespeople across San Francisco. Reach out and we’ll connect you.