Moving to Seattle from San Diego: What to Know (2026 Guide)

Updated November 2026. By Ryan Palardy, JD, Real Estate Agent and Washington Attorney, Get Happy at Home at Compass.

You’d be part of a dead-even trade. In the most recent IRS migration data (tax filings from 2022 to 2023), about 1,590 people moved from the San Diego area to King County, and about 1,590 went the other way. Some of the northbound traffic is Navy and Marine Corps families on orders to Kitsap, Everett or Whidbey Island, and some of it is biotech and tech. This guide is for all of you, with a note for the military families in the tax section that I think is worth the price of admission.

The adjustments aren’t what Angelenos deal with. You’re not escaping a price. You’re buying an older house, in a city with a real winter, for a little less money, in exchange for a paycheck without state tax taken out of it. Here’s how that plays out line by line.

The money: what your San Diego budget buys in Seattle

Sources: home prices, price per square foot and days on market from Redfin’s San Diego and Seattle housing market pages (all home types, three months ending September 2026). Rents are average apartment asking rents from Apartments.com, October 2026. Effective property tax rates from Ownwell (updated April 2026). Mello-Roos figures from the San Diego County Grand Jury’s 2022 report (fiscal year 2020-21). Income and estate tax from the Tax Foundation. Rainfall from NOAA’s 1991 to 2020 climate normals.

So the median Seattle home costs about 13% less, and about 19% less per square foot. One caveat before you celebrate: that’s all home types, and Seattle’s condo market is soft right now while its house market isn’t. If you’re shopping for a detached house, figure on more like $993k: that was the median for detached Seattle houses that sold from July through September (our own pull of NWMLS data, 1,162 sales). The median across all of King County was $850,000 in September, per the NWMLS. A San Diego house budget buys a comparable Seattle house with a little left over, and a San Diego condo budget buys a Seattle condo with a lot left over.

Rent is lower too, by about $330 a month at the average. If you don’t know the neighborhoods yet, renting for six months to a year before you buy is cheap insurance, and I’d do it through a winter, for reasons that will become clear in the weather section.

Speed is the adjustment. San Diego homes are taking about 28 days to sell, and you’re used to competing: Redfin calls your market very competitive, with three offers on the average house. Seattle homes are taking 19 days, so you’ll feel at home in the bidding, just with a shorter clock. That said, Seattle buyers have more choice than they did a year ago: King County had 31% more listings in September than the year before.

Taxes: leaving California, arriving in Washington

This is the section most San Diegans care about, and it has the same fine print as our Los Angeles guide, because it’s the same state. The headline is real: Washington doesn’t tax wages, and California taxes them at up to 13.3%. Four things to understand before the moving truck shows up, and a fifth for military families.

1. Prop 13 doesn’t come with you

Under Prop 13, your San Diego property tax is based on what you paid, and the assessed value can only rise by inflation or 2% a year, whichever is less, until the house sells. Washington works the other way. State law requires every county to revalue every property every year, so your Seattle bill is figured on something close to current market value, every year, for as long as you own the house. (Washington limits how fast each taxing district’s total levy can grow, so bills don’t track values one for one. But nothing like Prop 13 freezes your house’s number.) If you’ve owned in San Diego for a decade or more, your current bill may be a lot lower than the 1.19% headline rate suggests. Buy an $855k Seattle home at 0.98% and the bill is about $8,400 a year, starting year one. Compare that with your current bill, not with the rate. And California’s Prop 19, which lets some homeowners carry their old tax base to a new home, only works for a new home inside California.

The good news on the property tax line is Mello-Roos. About 11% of San Diego County homes pay a community facilities district tax on top of the regular bill, averaging about $2,160 a year, mostly in the newer master-planned areas. Washington has nothing like it. Your Seattle tax bill is the tax bill.

2. California keeps a claim on your stock comp

If you have RSUs or stock options that were granted while you lived in California, moving doesn’t wipe the slate clean. The Franchise Tax Board’s guidance on equity compensation allocates that income by workdays: California days divided by total days, from grant to vest for RSUs, or from grant to exercise for options. So if a grant vests a year after you move and you spent about half the vesting period working in California, expect California to tax roughly half of it. Once you’re a nonresident, California doesn’t tax the later gain when you sell the shares. On the Washington side, the capital gains tax is 7% on long-term gains above an annual deduction ($278,000 for 2025, adjusted each year for inflation) and 9.9% on gains over $1 million. Real estate is exempt. Stock isn’t. Talk to your CPA about the timing of any big sale before you move, not after.

3. You have to actually leave

California decides whether you’re still a resident by looking at your whole life. The FTB’s residency guidelines look at where your home and family are, where you’re registered to vote and licensed to drive, where your bank accounts and doctors are, and how much time you spend in each state. If you keep the San Diego house, the San Diego dentist and a lot of long weekends in San Diego, you’re making it easy to argue you never left. In the year you move, you’ll file a part-year resident return (Form 540NR) that splits your income between the two states.

4. The new Washington taxes

In March 2026, Washington passed a 9.9% tax on household income above $1 million, starting with tax year 2028, and voters kept it in November 2026 by rejecting Initiative 645. If your household earns under $1 million a year, it doesn’t touch you. Washington also has its own estate tax, which California doesn’t. For deaths on or after July 1, 2026, the first $3 million is excluded and the rate on the rest runs from 10% to 20%. A paid-down Seattle house plus retirement accounts gets to $3 million faster than people expect, so update your estate plan when you move. Sales tax is the one line that goes the wrong way: 10.55% in Seattle versus 7.75% in San Diego. You’ll notice it on the car, the furniture and the appliances, which is to say right after you move.

If you freelance or run a business

Washington has no income tax, but it does have a business and occupation (B&O) tax, charged on gross receipts rather than profit. If you’re a contractor or consultant earning $12,000 or more a year, the Department of Revenue expects you to register and file. A small business credit wipes out the tax for a lot of solo operators, but you still have to register to get it. Seattle also requires its own business license, and starting in 2026 Seattle’s own B&O tax doesn’t kick in until $2 million in revenue. Worth a call to a Washington CPA early.

Which Seattle neighborhood is like your San Diego neighborhood?

One warning: Seattle neighborhoods change block to block, partly because of the hills and partly because of the age of the houses. There are almost no master-planned communities inside the city, no HOA that keeps the whole street looking the same, and no guarantee the house next door was built in the same decade as yours. Two houses six blocks apart in the same neighborhood can be completely different purchases. That’s why we start new clients with a learning tour before anyone writes an offer.

Seattle houses: older, wetter, and no termite tent

This is the section I’d read twice. Among the detached houses that sold in Seattle from July through September 2026, the median one was built in 1945, about 39% were built before 1940, and 72% before 1960 (our NWMLS pull, 1,162 sales). If you’re coming from a Kensington bungalow, you already know what an old house asks of you. If you’re coming from a 1990s stucco house in Carmel Valley or a 1970s tract in Clairemont, almost everything about a Seattle house will be new: a basement or a crawl space, a wood frame that’s been wet for 80 winters, a composition roof that needs replacing every 20 to 25 years, galvanized or clay pipes, and in some houses the oil tank that used to heat the place, buried in the yard. (Our decade-by-decade guide to Seattle homes covers what each era tends to have.) New construction exists, but it’s mostly townhouses in the city and single-family in the far suburbs, and it carries a premium.

Here’s what the usual suspects cost, from our construction company’s billed jobs where we have them and current Seattle contractor pricing where we don’t:

None of these is a reason to skip an old house. They’re reasons to read the inspection for dollars. Get the sewer scoped on video on every house. Ask whether the house ever heated with oil. Look at drainage around the foundation and in the crawl space, because that’s where Seattle’s rain shows up first. A Seattle home inspection will flag most of this, and we price the big items on the spot when we tour, because that’s the number that should move your offer.

A few things come off your list. There’s no termite tent in Seattle. WSU’s pest guide lists two termites in this area, dampwood and subterranean, not the drywood termite that gets San Diego houses fumigated, and the wood-destroying organism report you’ll see instead is mostly about moisture, carpenter ants and rot. There’s no wildfire zone to price into your insurance and no insurer pulling out of your ZIP code. Air conditioning is the thing you’ll miss: about 53% of Seattle-area homes had it in 2021, per the Census Bureau’s American Housing Survey, and most of the older houses on your tour won’t. Coming from the coast, you may not have had it either. A ductless heat pump fixes it for the two hot weeks a year.

On earthquakes, you’re ahead of most transplants. You already know about bolting and bracing, and you probably have an opinion about earthquake insurance. The risk here is different, though: besides local faults like the Seattle Fault, the region sits near the Cascadia Subduction Zone offshore, which can produce a very large, long-shaking quake. The insurance math is similar to California’s. Earthquake coverage is added to a homeowners policy or bought separately, and the deductible typically runs 10% to 25% of the coverage on the house, according to the Washington Insurance Commissioner. Get the quote before you close and decide with real numbers.

Weather: same summer, very different winter

Everyone warns you about the rain. The rain is not the problem. The problem is November through February, and it has more to do with light than water.

Sources: NOAA 1991 to 2020 climate normals (San Diego International Airport, Sea-Tac Airport for Seattle). Daylight from sunrise-sunset.org.

Start with what doesn’t change. Seattle’s summer afternoons are, on average, two degrees warmer than San Diego’s, and from July through September it almost never rains. The days are longer, too: in late June the sun sets after 9 p.m. The trade is the water. Lake Washington is warm enough to swim in from July to September, at Madison Park, Madrona or Seward Park. Puget Sound stays cold all year; it’s for looking at, paddling on, and the occasional polar plunge.

Now the winter. Seattle’s rain is light, steady drizzle from roughly October through May, and it rarely rains hard enough to stop you doing anything. Umbrellas are optional (most locals skip them). Rain jackets are not. The light is the bigger adjustment. Around the winter solstice, Seattle gets about eight and a half hours of daylight, an hour and a half less than San Diego, and plenty of those hours are gray. You know May gray and June gloom. Imagine that from Halloween to Mother’s Day, with the sun going down at 4:20. People who move here from Southern California talk about the dark more than the rain. A good lamp and a winter trip somewhere sunny do a lot of work here, and San Diego is about a three-hour flight.

What you won’t miss: fire season, Santa Ana winds and the insurance letter that comes with them. Your yard stays green most of the year without irrigation, and if the lawn goes brown in August, it comes back with the October rain.

Getting around: fewer freeways, more rail

The average commute in the San Diego metro is 26.1 minutes. In the Seattle metro it’s 30 (Census Reporter, ACS 2024). The difference is the map. San Diego has the 5, the 805, the 15, the 8 and the 163 covering the county like a net. Seattle has two north-south freeways, two floating bridges across Lake Washington, and hills and water in between. Your commute depends more on which side of the lake you’re on than how many miles it is.

Rail is about the same size, with the same kind of recent growth. The San Diego Trolley runs 65 miles with 62 stations and carries about 119,000 riders on a weekday, and the Blue Line’s extension to UTC opened in 2021. Link light rail runs 63 miles with 51 stations, and since March 28, 2026 the 2 Line crosses Lake Washington, connecting Seattle with Mercer Island, Bellevue and Redmond. Link runs underground through downtown and Capitol Hill, and the stations sit in neighborhoods where people live, which is why it carries more riders (more than 160,000 boardings a day, by Sound Transit’s counts reported this fall) with eleven fewer stations. Extensions to West Seattle and Ballard are planned for the 2030s (we have opinions about Ballard’s). The bus network does a lot more work here than MTS does, and plenty of our Capitol Hill clients use their cars less than once a week. If you’re headed to Everett or Kitsap for the Navy, Sounder commuter rail and the ferries fill the Coaster’s role.

If you’ll drive across the lake, I-90 is free and SR 520 is tolled in both directions: as of October 2026, up to $4.90 at weekday rush hour with a Good To Go pass and $6.90 if they mail you the bill. Your FasTrak transponder doesn’t work here. Good To Go is the Washington equivalent, and it also covers the SR 99 tunnel under downtown and the express lanes on I-405. You stay in the Pacific time zone, which makes this the easiest move on the list for keeping in touch with home.

Jobs and schools

If you’re transferring with Amazon, Microsoft or another big employer, you already know the address. If you’re moving on orders, you know your base. If you’re moving without a job lined up, be careful. San Diego’s economy stands on three legs: the military, biotech and tourism, with Qualcomm and the universities in the mix. Seattle tilts hard toward a few very large tech employers, and it’s been a rough few years for them. By our count, King and Snohomish counties added about 42,000 tech jobs from late 2019 to August 2022, then lost about 29,000 of them by early 2025. (We dug into what that’s doing to Eastside home prices in this post.) The parts of Seattle that will feel familiar: a real biotech cluster in South Lake Union around Fred Hutch and the UW, and a military presence that’s the sixth largest of any state, about 55,000 active-duty, most of it at Kitsap, Everett, Whidbey Island and JBLM. My advice either way: get the offer letter, or the orders, before you sign a purchase agreement.

For schools, if you’re used to San Diego Unified’s choice program and the North County districts being the whole reason a house costs what it does, Seattle is a little less stark. Seattle Public Schools assigns by address, and the Eastside cities have their own districts (Bellevue, Lake Washington for Kirkland and Redmond, Mercer Island, Issaquah and Northshore). Boundaries don’t follow neighborhood names, so check the district’s boundary lookup for the exact address before you offer. Military families: the Central Kitsap, Bremerton and Oak Harbor districts are built around the bases the way Coronado’s is, and the state has an interstate compact for transferring credits and enrollment.

A lot of families moving here rule out Seattle Public Schools on reputation alone and head straight for the Eastside, the way San Diego families head for Poway. I think that’s often a mistake, and we wrote about why Seattle’s schools are better than their reputation. If you’re buying for the long haul, our post on Seattle’s sleeper schools covers the ones we think will improve the most.

Your first 30 days in Washington

Driver’s license. State law gives you 30 days after you move to get a Washington driver’s license, and you need it before you can register your car here. Active-duty servicemembers stationed here can keep their home-state plates and registration, and so can a spouse if the car is registered to the servicemember or jointly.

Car registration. New residents also have 30 days to register their vehicles in Washington. No smog check: Washington ended its emissions program in 2020. In King County the bill includes Sound Transit and transit fees, so expect more than you’re used to paying.

Register to vote. Washington votes entirely by mail, so register at your new address and the ballot comes to you. Then cancel your California registration, which is also one of the FTB’s residency factors.

Move the rest of your life. Change your address with your bank, brokerage and employer, and move your doctors when you can. Tell your employer’s payroll team the move date so your California withholding stops. Military families: file the new state withholding election the same week.

Good To Go pass. If you’ll cross SR 520, use the SR 99 tunnel or the express toll lanes on 405, set up a Good To Go account before your first trip. Pay-by-mail costs $2 more per crossing on 520.

Fall maintenance. Gutters and roof moss are an annual thing here. Gutter cleaning runs about $200 to $500 and roof moss removal about $500 to $800 from Seattle companies. The brush clearance you did every spring in San Diego becomes a ladder in November.

Should you sell your San Diego house or rent it out?

San Diego is a strong rental market, and if you bought before 2022 your Prop 13 base and your mortgage rate are both assets that disappear the day you sell. Plenty of people in your spot keep the house, and military families in particular tend to, because they might be back on the next set of orders.

Before you do, here’s what keeping it means. You’ll file a California nonresident return every year on the rent, and keeping a California house is one of the facts the FTB weighs when it decides whether you really left, so keep the rest of your life clean on that front. The bigger issue is the federal capital gains exclusion on your home sale: a house you rent out long enough stops being your principal residence. The general rule is that you have to have lived there two of the last five years, so you have roughly three years after moving out before that window closes, and on a San Diego house the gain you’d be protecting is probably large. (Military families on qualified extended duty can suspend that five-year clock for up to ten years; ask your base legal office.) Mello-Roos and the HOA keep billing you whether or not the tenant pays. And you’ll be managing a property from 1,250 miles away. None of that makes it a bad idea. It means you should run the numbers with a CPA before you decide.

If you sell, two California costs show up at closing. San Diego County charges a documentary transfer tax of $1.10 per $1,000 of price, so about $1,080 on a $979k sale, and the seller pays it by custom. California will also hold back 3 1/3% of the sales price for state income tax, using Form 593, unless you qualify for an exemption. The main one is selling your principal residence (generally, you owned it and lived in it for two of the last five years). A rental doesn’t qualify, which is one more reason to decide quickly. Washington’s version, the real estate excise tax, is paid by the seller, so it won’t come up when you buy here.

Timing is easier than it is for most people: San Diego homes are taking about 28 days to sell and Seattle homes about 19, so a well-priced San Diego house can close inside your Seattle timeline. Offers contingent on selling another house are still hard to win on Seattle houses that are drawing multiple offers, so most people either sell first and rent here for a bit, or line up a bridge loan with a lender who does them. Condos are the exception: King County had 7 months of condo inventory in September, so a condo buyer has more room to negotiate. (Our guide to the main loan types is a decent primer before you call a lender, and VA loans work the same way here as they did in San Diego.)

Buy or rent here? If you know where you’ll work and you’ve spent real time in a couple of neighborhoods, I think buying soon makes sense, because buyers have more room now than they did in 2025 and your money goes further here than it did at home. If you don’t know the neighborhoods yet, rent for six months to a year, through a winter, and see whether the dark bothers you before you commit. If this is your first old house, our list of first-time buyer mistakes is worth a read even if it isn’t your first house.

FAQ: moving from San Diego to Seattle

Disclaimer: This article is general information, not legal, tax or financial advice. Tax rules, ballot measures and market numbers change, and costs vary by house. Talk with your own CPA, attorney, inspector and contractor before making decisions.