For homeowners and property owners
Build or improve your property
For homeowners and owners planning an ADU, substantial renovation, addition, driveway, site improvement or new home.
Discuss Your Project
Seattle · Tacoma · Pacific Northwest
Residential construction and development, built for the Pacific Northwest.
AUCTOR renovates, builds and develops residential property across the Greater Seattle–Tacoma area—from ADUs and major renovations to value-add properties and new construction.
Start a Construction Project
For homeowners and property owners
Send Us a Property
For brokers, wholesalers and investors
For brokers, wholesalers and investors
Send us an opportunity
For owners, brokers, wholesalers and investors with a value-add home, vacant lot, teardown or potential development property.
Submit a Property
Services
What we build and coordinate.
Four areas of work, from a single site improvement to full residential development.
ADUs and Residential Construction
ADUs, DADUs, garage conversions and ground-up residential construction, planned around what the lot actually allows.
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Renovations and Additions
Substantial remodels, layout changes, additions, conversions and full property transformations.
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Driveways and Site Improvements
Driveways, drainage, grading, concrete, retaining work and selected exterior improvements.
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Redevelopment and Development
Value-add acquisitions, fix-and-flip projects, vacant land, teardowns, infill development and spec construction.
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Why AUCTOR
A builder’s approach and an owner’s perspective.
Practical feasibility before commitments
We establish what a property can realistically support before anyone commits to a scope or a number.
Direct communication with the owners
You talk to the people evaluating and building the project, not a sales layer.
Permit-conscious planning
Permitting, inspections and documentation are planned for from the first conversation.
Decisions based on durability and long-term property value
Methods and materials are chosen for how they perform over decades, not for day one.
Process
From first review to completion.
- 01
Property or project review
We look at the property, the goal and whatever information already exists.
- 02
Feasibility and scope
Site conditions, permitting considerations and a practical budget range.
- 03
Planning and preconstruction
Plans, engineering, selections, scheduling and permit coordination.
- 04
Construction
Coordinated work, regular communication and management through inspections.
- 05
Completion
Final review, outstanding items resolved, project handed over.
About AUCTOR
Locally owned. Hands-on. Run by the people who build it.
AUCTOR is owner-operated by Thaddaeus Copling and Peter Prins. The company grew out of a shared interest in construction, real estate and the potential hidden in overlooked properties. Clients and partners work directly with the people evaluating, planning and delivering the project.
Thaddaeus Copling
Co-Owner
Peter Prins
Co-Owner
Tell us what you are working with.
Send us the project, property or opportunity. We will review it directly and tell you whether it fits AUCTOR’s current scope.