SeaTac grew from 31,394 to 34,578 residents between 2020 and 2025, a 10.1% increase that ranks 52nd among Washington’s 281 municipalities. Web design in SeaTac has to reach people who do not know any local business yet. Aria’s plan costs $89 a month with domain, business email and hosting, and the first monthly fee only comes after your approval.

No setup fee: you only pay the $89 monthly fee, after you approve your website.

Small business website advice, SeaTac edition

SeaTac is 5.4 miles southeast of Kent; 7.0% of its commuters spend an hour or more getting to work. A commuter city researches at night and calls in the morning. Say clearly that you are local and list the neighborhoods you cover; that is your advantage over the metro. That does not take a big website. It takes one that answers the right questions, with the details right.

With Interstate 5 crossing the city limits, SeaTac sees a steady flow of travelers. Travelers search from the road, want an answer in seconds and will not call to ask what you have. A page with the services, the hours and a map is what a traveler needs.

The jobs SeaTac residents hold are mostly in transportation, warehousing and utilities (15.9%), followed by education, health care and social assistance (14.2%). Each field brings its own rhythm: some residents search before work, others on their lunch break. Make your hours impossible to miss, and say which days you are open late if you do. A short, accurate page does more for this audience than a clever one.

Weather in SeaTac: plan the website around it

SeaTac weather, in normals: August highs around 78°F, December lows around 37°F, measured at Seattle Tacoma International Airport, 0.7 miles away (1991-2020). Precipitation totals about 39 inches a year, with November the wettest month. Mild weather stretches the outdoor season: landscaping, outdoor dining and recreation stay busy for months. Seasonal updates helps: winter hours, summer specials, storm-season notices, sent by email and included in the monthly fee.

Which SeaTac businesses need a small business website

King County has, among its employer businesses:

  • Architecture firms, 455 in the count. What works online: a portfolio of built work, the project types you take and a contact form.
  • Coffee shops and snack bars, 1,000 in the count. What works online: what you serve, when you open and where to park.
  • Real estate offices, 2,276 in the count. What works online: the neighborhoods you know best, agent profiles and a contact form for buyers and sellers.
  • Dental offices, 1,434 in the count. What works online: the team, the treatments in plain words and a form that sends appointment requests to your email.
  • Painting contractors, 531 in the count. What works online: interior and exterior project photos, the areas you serve and an estimate request form.

In King County, the Census counted 70,376 businesses with employees and 193,904 without a payroll in 2023; the second group is where a simple, affordable website changes the most. King County has 1.5 times the national share of real estate businesses: 5,152 of them in the 2023 count. In that line of work, buyers, sellers and renters start online, so the website should show listings or the areas you cover, agent profiles and a contact form for each kind of client. Schools and training providers are also overrepresented (1,554, 1.6 times the national share). None of them needs a complicated site; they need one that answers the customer’s first questions honestly.

Your service area around SeaTac

Within a short drive of SeaTac you find Normandy Park (2.3 miles west), Tukwila (2.5 miles northeast), Burien (3.1 miles northwest), Des Moines (3.9 miles south), Kent (5.4 miles southeast) and Renton (5.4 miles northeast). Part of Mount Rainier National Park is within 48 miles of the city. Seattle–Tacoma International Airport (SEA) is inside SeaTac. A 25-mile radius around SeaTac takes in 57 other municipalities. Seattle, seat of King County, lies 12 miles to the north. Naming Des Moines, Burien and the other places you cover on a service area page tells customers outside SeaTac that you work there too.

Census facts about SeaTac

34,578Residents, 2025 estimateCensus Bureau estimate
+10.1%Change in population, 2020-2025Washington: +3.8%
$81,104Median household incomeWashington: $98,141
36.8Half the residents are older thanWashington: 38.3
91.9%Households with a broadband planWashington: 93.6%
70,376Employer establishments in King CountyCounty Business Patterns 2023

Of the 12,134 households in SeaTac, 46.5% are homeowners. A typical home here is worth $519,700; the median rent is $1,660 (Washington medians: $564,600 and $1,760). The median age is 36.8, against 38.3 for Washington. The median household income is $81,104, about 17% below the Washington median of $98,141.

Who is searching in SeaTac

About 39.9% of SeaTac’s people were born abroad. Clear wording and good photos help every customer, wherever they grew up.

SeaTac is a city of apartments: 42.9% of homes are in buildings with five or more units. Apartment living means movers, cleaners, storage, small repairs and delivery, all searched on a phone.

Public transportation carries 6.5% of SeaTac commuters. Directions that start from the bus or train stop are worth a line on the contact page.

Walking to work is common in SeaTac: 5.2% of workers do it. Walk-in customers decide on the spot, often after checking hours on a phone at the door.

Paperwork and rules for Washington businesses online

A few rules apply to any SeaTac business that sells or advertises online:

  • King County and the City of SeaTac may each charge a local business tax; ask both before you open. Official source
  • Doing business under a name other than the owner’s full legal name is one of the conditions that requires a Washington state business license, so the trade name is registered together with that license at the Department of Revenue. Official source
  • Washington’s state retail sales tax rate is 6.5%, with a local rate added depending on the city or county. Washington State Department of Revenue
  • If you send marketing email from your new business address, the CAN-SPAM rules (16 CFR Part 316) apply, including an easy way for people to opt out. 16 CFR Part 316
  • Selling to customers in other states? Each state sets its own threshold for remote sellers; Washington’s is More than $100,000 in combined gross receipts sourced or attributed to Washington in the current or prior year (the 200-transaction test was removed in 2019). Official source

This is general information, not legal advice; check with the Washington agencies, King County, the city of SeaTac or an attorney.

Small business website, start to finish

Based in Curitiba, Brazil, Aria has been building business websites since 2008. Everything is done online, so businesses in SeaTac get exactly the same plan as anyone else.

  1. The sign-up at cadastro.ariaserv.com/en takes about 5 minutes; your logo and photos go by email.
  2. Within 5 business days the website is ready on a temporary link, and you review it and ask for changes.
  3. Only after you approve do you pay the first monthly fee; then the site is published on your domain.

After launch, changes to text, photos and prices are requested by email and are part of the monthly fee; quick questions go by email too.

Plan$89/monthNo setup fee: you only pay the $89 monthly fee, after you approve your website. No lock-in contract.
  • Business website or online store, same price
  • Your domain, registered and renewed by us (or the one you already have)
  • Business email on your domain: 5 GB, webmail and spam filtering
  • Hosting, SSL certificate and daily backups
  • Changes to text, photos and prices, requested by email
  • Ready within 5 business days on a temporary link
I want the $89 plan

Questions from SeaTac business owners

I work in SeaTac and nearby towns. Can the website say that?

Yes. Tell us by email which towns you cover, Kent and Tukwila included, and they go on the website’s service area page.

Do you have an office in SeaTac?

No visits: Aria works remotely from Curitiba, Brazil. You send your logo, photos and texts by email, and approve the website on a temporary link.

Does the website work on a cellphone?

Yes, the layout adapts to phones and tablets. That matters in SeaTac, where 14.5% of households get online only through a cellphone data plan.

Is there a setup fee?

No. No setup fee: you only pay the $89 monthly fee, after you approve your website. There is no lock-in contract either: you can end the service whenever you need.

Get your SeaTac business online for $89 a month

You approve the website before the first payment, and there is no setup fee.

Start my sign-up
Sources for the numbers on this page
  • U.S. Census Bureau: Vintage 2025 population estimates; American Community Survey 2020-2024 (5-year); ZIP Code and County Business Patterns 2023; Nonemployer Statistics 2023; 2025 Gazetteer (straight-line distances).
  • Climate: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020 (station USW00024233).
  • Highways: U.S. Census Bureau TIGER/Line 2024 primary roads and 2024 cartographic boundary files.
  • Founding year, nickname, elevation, waters, colleges, hospitals, airports and parks: Wikidata (item Q985072), retrieved on October 30, 2026; distances are straight-line.
  • Rules for Washington businesses: official sources linked above, checked on October 30, 2026. County seat: USGS National Atlas.