The decision is more than just square footage. In Washington's market, retaining your low-interest mortgage is a powerful financial incentive to remodel, often outweighing the high transactional costs of moving.
Typical Addition Cost
$100k - $300k+
A major upfront investment into your existing property.
Total Transactional Cost to Move
8% - 16%
Of home values, plus moving expenses, and a new, higher mortgage rate.
The Deciding Factor
Your Mortgage Rate
Giving up a sub-4% rate can cost tens of thousands over the life of a new loan.
While no project offers a 100% financial return, exterior upgrades and minor kitchen remodels consistently provide the highest value.
Beyond finances, NARI's "Joy Score" quantifies the satisfaction a project brings. These projects consistently score a perfect 10/10.
In high-cost areas, foundation, structural, and system upgrades are major "budget busters" that drive up the total project cost.
A competitive market for skilled tradespeople commands premium wages.
Rigorous energy (WSEC) and seismic requirements add significant expense to materials and engineering.
High property values create a market expectation for premium materials to match.
Recent state laws (HB 1337) have revolutionized Accessory Dwelling Units, making them powerful financial assets. However, a "regulatory lag" exists as local cities slowly update their codes. Always verify with your local jurisdiction.
✓ = In Compliance | ✗ = Not Yet in Compliance with State Law
Using the free Washington L&I "Verify a Contractor" tool is the single most important action you can take to protect your investment. Before you sign anything, follow this non-negotiable checklist.
1. Active Registration
2. Sufficient Bond
3. Liability Insurance
4. Workers' Comp
5. Clean History