A Finish Built to Face the Weather
A.G. Williams Painting Company provides exterior painting for homeowners in Westchester County, NY, the lower Hudson Valley, and Fairfield County, CT. We plan the work around what decides how long the finish lasts: the existing paint type and condition, thorough prep, dry painting conditions, and products matched to each surface. Siding, trim, shutters, doors, and porches are all part of the scope.
- Wash and prep firstScrape, sand, caulk, and prime before color
- Scheduled with youPlanned around your household and the weather
- 5-Year Residential Paint WarrantyOn all residential painting
- Career paintersFull-time craftsmen, employed and insured

Service Overview
Exterior Painting
The best exterior finish starts before the first coat. The washing, scraping, sanding, and priming underneath matter more than a fast paint day—and they are what the warranty stands on.
A.G. Williams is licensed and insured, and has painted home exteriors across Westchester County, the lower Hudson Valley, and Fairfield County since 1906.
What Exterior Work Includes
Surface preparation
Washing, scraping, sanding, caulking, and priming bare spots, so the new paint bonds to the surface instead of peeling early.
Carpentry review
We flag rotted wood, failing trim, and moisture problems before painting, so repairs happen in the right order. You approve repair costs before work proceeds.
Color and sheen guidance
You select colors before the job starts. We help you choose finishes for siding, trim, shutters, doors, and porches that hold up against sun and weather.
Crisp edges where materials meet
Careful, painted-by-hand edges where siding meets windows, trim, and stone—the places rushed exterior jobs show first.
Grounds protection
Shrubs, walkways, decks, and outdoor furniture are covered while we work, and each day ends with a cleanup of the work area.
Older-home care
Homes built before 1978 may contain lead paint. We identify that at the walkthrough and follow lead-safe work practices throughout the job.
How an Exterior Project Runs

Walkthrough
We walk the outside of the home with you, assess peeling areas, trim condition, moisture, and access, and note any older-home considerations.

Written proposal
You receive a written proposal, typically within a few business days, that separates prep, carpentry, and painting so the plan is clear before work begins.

Prep, then paint
The surface is washed and prepped first, and painting days are planned with you—around your household’s schedule and the weather. A field supervisor meets you before work begins, and you have direct phone numbers for the field supervisor and crew leader.

Final walkthrough
We review trim, edges, and touch-ups together, confirm warranty terms, and make sure the grounds are left the way we found them.
Why Prep Beats a Fast Paint Day
An exterior finish fails from the surface up. The washing, scraping, sanding, and priming underneath matter far more than how quickly the color goes on. Painting over a surface that was not ready is how a house ends up repainted years too soon.
Exterior Detail
Finished exterior and prep detail from our work.


Rated 5 stars on Google, Houzz, and Angi. See more in the project gallery.
Warranty and Financing
Backed in Writing, with Financing if You Want It
Every residential painting project is backed by the 5-Year Residential Paint Warranty. Financing options are available; ask about 0%* plans through Wisetack, subject to credit approval and published terms. All financing is subject to credit approval. Terms may vary. Payment options through Wisetack are provided by Wisetack's lending partners.
Exterior Painting Questions
How long does exterior paint last?
It depends on how well the surface was prepared, how much sun and weather the home faces, and the product used. Preparation is the biggest factor, which is why our exterior work begins with washing, scraping, sanding, and priming before any paint goes on.
What does exterior prep include?
Washing the surface, scraping loose paint, sanding rough areas, caulking gaps, and priming bare spots. Prep is itemized in the proposal so you can see exactly what your home needs.
What if there is rotted wood or damaged trim?
We flag it during the walkthrough so repairs happen before paint. Painting over failed wood only hides the problem. Repair costs are itemized, and you approve them before work proceeds.
How do you handle weather and scheduling?
We build the schedule with you at the start and adjust it together when the weather shifts. Paint needs dry conditions and suitable temperatures to bond well, so when a day moves, the crew leader tells you promptly and replans it with you.
What time of year can you paint outside?
Temperature and moisture decide the season, not the calendar. In our region, most exterior work runs from spring through fall, and we will tell you at the walkthrough whether your project fits the current window.
Do older homes need special handling?
Sometimes. Homes built before 1978 may contain lead paint. We identify that at the walkthrough and follow lead-safe work practices—containing dust and debris and cleaning up thoroughly—throughout the job.
What parts of the house do you paint?
Siding, trim, shutters, doors, porches, railings, and garage doors. The proposal itemizes each so you can decide what to include.
Do you wash the house first?
Yes. Washing is the first step of prep, so the paint bonds to a clean surface. We also offer power washing as a standalone service.
Who picks the colors?
You do, before the job starts. We help you weigh how each color and finish holds up against sun exposure and weather on your home’s different surfaces.
Is the work warrantied?
Yes. Every residential painting project is backed by the 5-Year Residential Paint Warranty. The terms are reviewed with you at the final walkthrough.
Can I finance the project?
Yes. Financing options are available; ask about 0%* plans. Financing is offered through Wisetack, subject to credit approval and published terms.
What happens if something isn’t right after the job?
We come back and fix it. Standing behind the work is part of the job, and it is why families have hired us across generations.
Already Scheduled?
Preparation and Care Guides
Use the instructions for your scheduled project, or contact your field supervisor if you are unsure which guide applies.
- Exterior painting preparationBefore your project
Start with a Walkthrough
Tell us about your home’s exterior, and we will walk it with you and prepare a written proposal.
Request a Proposal