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Top-Rated Deck, fence, patio or porch clean and sealers in San Mateo - Updated Nov 2026

Avatar for Next Gen Painting & Staining
Next Gen Painting & Staining
5.0(
23
)
Deck, Fence, Patio or Porch - Clean and Seal

Serving San Mateo, CA and surrounding areas

Approved

In business since 2022

Free estimates

Small jobs welcome

"Arrived when he said he would, performed a complete sand and seal on my deck, which is a large deck...was very neat and meticulous which Is a huge plus for me as I am somewhat of a neat freak!! I like things done right... Some say iam a little to picky!! All said I would highly recommend them to anyone!ð"
Response time11 hrs
Response rate95%
7 neighbors recently requested a quote
Avatar for Cal Preserving, Inc.
Cal Preserving, Inc.
4.5(
15
)
Deck, Fence, Patio or Porch - Clean and Seal

Serving San Mateo, CA and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Very easy to work with. I'd used them before but this time I got estimates from other contractors and was amazed how much more reasonable Cal Preserving was. The difference may be that the others pointed to additional steps that could be taken. Did Cal Preserving "miss" these things or recognize they weren't necessary--I'm inclined to believe the latter."
 Deck - before
 Deck - after
 Deck - before
 Deck - after
 Deck - before

+2

Response time2 days
14 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Landscaping Bay Area
Landscaping Bay Area
4.6(
117
)
Deck, Fence, Patio or Porch - Clean and Seal

Serving San Mateo, CA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"These guys were great! We moved into a house and needed help understanding why our landscaping quickly started dying. Landscaping Bay Area carefully diagnosed and quickly fixed the issues, thoughtfully taught us about our system, and added lines to automate our yard care. Would absolutely recommend and use them again!"
Ground cover
Ground cover
Additional Photos
Additional Photos
Additional Photos

+15

Recommended by88%of homeowners
Avatar for Trimble Construction and Custom Painting
Trimble Construction and Custom Painting
4.9(
32
)
Deck, Fence, Patio or Porch - Clean and Seal

Serving San Mateo, CA and surrounding areas

Approved

In business since 1989

Free estimates

Credit card accepted

"We hired Trimble Construction and Custom Painting for many projects. The first job was the kitchen renovation which was done exactly as we wanted. We have since had them take care of the horrible ceiling cracks in our living room and vestibule and paint both rooms. They also installed handrails on the staircase to the upper level. In the backyard they replaced the deck and a 80ft long wooden walkway. All the work has been completed within the agreed costs and are a pleasure to look at. The finished improvements and workmanship make our house more comfortable and welcoming. "
BEAUTIFUL DECK  RESTORATIION (BEFORE & AFTER)
BEAUTIFUL DECK RESTORATIION (BEFORE & AFTER)
BEAUTIFUL DECK RESTORATIION (BEFORE & AFTER)
BEAUTIFUL DECK RESTORATIION (BEFORE & AFTER)
BEAUTIFUL DECK RESTORATIION (BEFORE & AFTER)

+71

Response time2 days
3 neighbors recently requested a quote
Recommended by63%of homeowners
Avatar for Cuevas Lumber & Fence
Cuevas Lumber & Fence
4.4(
206
)
Deck, Fence, Patio or Porch - Clean and Seal

Serving San Mateo, CA and surrounding areas

In business since 2002

Free estimates

"Replaced 81 feet of fence and replaced gate with a craftsman's gate. Very professinal and job scheduled very quickly. Cuevas Lumber and Fence did a great job. Looks beautiful. Would highly recommend."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+5

Recommended by93%of homeowners
Palm Construction, Inc.
5.0(
90
)
Deck, Fence, Patio or Porch - Clean and Seal

Serving San Mateo, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"We worked with Ali (sales manager) and Tony (project manager), who took the time to design a project that made sense for our property and our budget, made a number of suggestions and recommendations and were never pushy or tried to "sell" us on something. The crew really went above and beyond to provide top quality workmanship and overall we were in very good hands. Highly recommended!"
Recommended by100%of homeowners
Avatar for Star’s Handy Service
Star’s Handy Service
4.7(
63
)
Deck, Fence, Patio or Porch - Clean and Seal

Serving San Mateo, CA and surrounding areas

In business since 2018

Free estimates

Credit card accepted

"They were very professional. Arrived on time and explained what they were going to do. They were very careful with my belongings and cleaned before and after installation. They were polite and very knowledgeable about the process and the end product was outstanding. I would highly recommend this company to anyone."
Handymen Project
Playground assembly
Handyman Services Project
Handyman Services Project
Handyman Services Project

+35

Recommended by96%of homeowners
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FAQs for deck, fence, patio or porch clean and seal projects in San Mateo, CA

You should clean your deck before sealing it. Cleaning before refinishing is critical. If you don’t remove dirt and debris, you'll trap moisture in the wood, which prevents the new sealer from working correctly and can lead to costly repairs. Whether you need to sand, power wash, or sandblast depends on your deck's condition.

Sealing and staining your deck are essential maintenance methods that protect and beautify your outdoor space. Stain adds rich color and guards against fading, while sealant fortifies the wood against moisture and weather damage. Wood type, climate, deck age, and the degree of existing damage determine whether your deck benefits from one or both treatments. Using both options extends your deck’s durability and enhances its overall appearance.

Power washing and sealing your deck costs $500 to $1,700. This process combines the removal of stubborn dirt and debris with a protective seal that preserves the wood’s integrity. Effective cleaning eliminates harmful buildup, and a proper seal prevents moisture damage and wood decay, ensuring long-term durability and reducing future repair expenses.

Your deck must be sealed every one to three years to maintain its strength and appearance. Regular sealing is essential to protect the wood against moisture, mold, and harmful UV rays. A consistent sealing schedule prevents rapid deterioration and costly repairs. Inspections should be performed annually to determine if the protective layer remains intact, extending the life of your deck.

Leaving your deck untreated compromises its structural integrity and safety. An unprotected deck rots quickly due to moisture and environmental exposure, which means that neglecting sealing results in rapid decay and expensive replacement costs of $4,125 to $11,650. Sealing your deck is essential for maintaining its durability and protecting your home.

The sealant on your deck dries within a few hours and reaches full cure within 72 hours before regular use. It is essential to wait until the complete curing period to ensure the protective layer fully sets and resists weather and foot traffic. Proper drying guarantees that your deck is fully protected against moisture and environmental damage, ensuring lasting quality.

The San Mateo, CA homeowners’ guide to deck, fence, patio or porch clean and seals

From average costs to expert advice, get all the answers you need to get your job done.