archive blog
Living in the Main House While a DADU Is Being Built
Staying in the main house during a cottage build means living beside a job site. Here are the Seattle rules that limit noise and mud, and how households prepare.
How Seattle Rain and Cold Weather Affect DADU Construction
Cottage projects keep going through Seattle’s wet months, with tighter soil cover rules and more planning. Here is what the Stormwater Code and residential code require.
How Long Does It Take to Build a Backyard Cottage?
No honest source can promise a build length, but the factors are known. Here is what Seattle codes and utilities say about inspections, permits, weather and work hours.
What Happens After Your DADU Permit Is Approved?
An issued permit starts a fixed sequence of field work and inspections. Here is the order Seattle’s residential code sets, from site setup to occupancy.
How Seattle Stormwater Requirements Affect Backyard Cottages
A cottage roof and new paths send more rain off the lot. Seattle’s 2026 Stormwater Code sets the triggers for drainage review and on-site tools.
Planning Internet and Low Voltage Connections for a DADU
Data cable, coax and alarm wiring are simple to add while trenches are open and walls are bare. Here is what Seattle’s codes say and when to plan each piece.
Choosing Hot Water Equipment for a Compact ADU
A cottage water heater competes for closet space, panel capacity and energy credits. Here is how the main types compare and what Seattle’s codes say about them.
Why Ventilation Matters in a Well Insulated DADU
A tight new cottage needs fresh air on purpose. Here is what Seattle’s residential code requires for whole house fans, kitchen and bath exhaust, smoke day controls and testing.
Heating and Cooling Options for Seattle Backyard Cottages
Most Seattle cottages end up with a heat pump, often ductless. Here is how the energy code, separate controls, right sizing and outdoor unit placement shape the choice.
Can a DADU Have Its Own Utility Meters?
A Seattle cottage can get its own electric meter, but water usually stays on one service per parcel. Here is what City Light, SPU and PSE each allow for a cottage.