Now covered in more depth
Home Addition in Seattle: Architect vs. Contractor, Which Do You Need?
One of the most common points of confusion for first-time homeowners planning a major project is understanding the difference between an architect and a general contractor, and why you typically need both.
What an Architect Does
An architect is a licensed design professional who translates your goals into buildable drawings. Their work includes:
- Designing the spaces, layout, and appearance of the building
- Producing permitted construction documents
- Managing the permit process with the city
- Coordinating structural and mechanical engineers
- Reviewing contractor work during construction to verify it matches the drawings
An architect’s primary deliverable is drawings and specifications. They do not build.
What a General Contractor Does
A general contractor (GC) builds what the architect draws. Their work includes:
- Bidding the project based on permit drawings
- Hiring and managing subcontractors (framing, plumbing, electrical, etc.)
- Ordering and managing materials
- Managing the construction schedule and budget
- Pulling the building permit and managing inspections
A GC’s primary deliverable is a completed building.
Planning a project?
Working out what your lot will allow, and what it will cost?
Send David the address and a few lines about what you want. The first basic feasibility check is free and usually takes about a day.
Architect since 1996, member of the AIA and NCARB. Three Masonry Excellence Awards for commercial projects; the Carr residence was featured in Above The Lake and Lux magazines.
Do You Always Need Both?
For projects requiring a building permit, additions, ADUs, new construction, structural renovations, you will need both. The permit requires architectural drawings. Construction requires a licensed contractor.
For cosmetic work (paint, floors, cabinet replacement that does not move walls) you can go straight to a contractor. But the moment you are moving walls, adding space, or touching structure, you need an architect first.
Design-Build: A Third Option
Some firms combine architecture and construction under one contract. This can streamline communication but reduces competitive bidding. See our post on architect vs. design-build for a full comparison.
Piper Cole Architects has strong relationships with quality general contractors throughout the Seattle metro area and is happy to recommend contractors who are a good fit for your project and budget. Contact us for a free feasibility check. Call 425-753-6452.
Related guide: How to Choose a General Contractor on the Eastside.


