Feasa Property feasibility in Washington

Feasibility, unlocked

Discover what your property could become and what it takes to get there. Feasa analyzes zoning, critical areas, utilities, and site constraints to help you explore expanding your home, adding a backyard home, splitting your lot, or developing single-family and multifamily housing.

Get a clear report outlining your options, potential roadblocks, and next steps before spending thousands on plans and studies. Then ask Feasa questions about your results for personalized guidance to help move your project forward.

Is the lot worth studies that cost thousands? Find out first for $199.

A sample lot, read A 60 by 140 foot lot drawn to scale. A 20 foot front setback and 5 foot side and rear setbacks trim the edges, a stream buffer takes the rear corner, and about 2,300 square feet behind the existing house stay buildable. SAMPLE LOT · DRAWN TO SCALE STREET STREAM BUFFER HOUSE ~2,300 SQ FT CLEAR TO BUILD 140 FT DEEP 60 FT - - - SETBACKS: 20 FT FRONT · 5 FT SIDE & REAR

This is what Feasa looks for. It reports what the jurisdiction’s rules allow. It doesn’t design anything.

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Sample Quick lookup

123 Example St, Olympia, WA

Parcel 00000-000-000 · City of Olympia · sample report

Zoning

Zoned R-4, Low Density Residential. Minimum lot size in this zone is 5,000 sq ft; this parcel is 8,400 sq ft (60 by 140 ft).

Overlays

  • Verified Critical areas overlay: a mapped stream’s buffer reaches the rear corner of the parcel.
  • Unknown Critical areas report on file for this parcel: none found in the jurisdiction's GIS layer.

The obvious constraints

  • Maximum structure height 35 ft in this zone.
  • Setbacks: 20 ft front, 5 ft side and rear.
  • Impervious surface capped at 55% of lot area.

That's what a Quick lookup answers: the rules that govern the parcel, not what actually fits inside them. Feasibility takes the next step: what fits here, and what stands in the way of building it.

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Sample Feasibility

A sample lot, read A 60 by 140 foot lot drawn to scale. A 20 foot front setback and 5 foot side and rear setbacks trim the edges, a stream buffer takes the rear corner, and about 2,300 square feet behind the existing house stay buildable. SAMPLE LOT · DRAWN TO SCALE STREET STREAM BUFFER HOUSE ~2,300 SQ FT CLEAR TO BUILD 140 FT DEEP 60 FT - - - SETBACKS: 20 FT FRONT · 5 FT SIDE & REAR

123 Example St, Olympia, WA

Parcel 00000-000-000 · City of Olympia · sample report

What fits

A detached accessory structure fits. The buildable envelope after setbacks and the stream buffer leaves roughly 2,300 sq ft clear behind the house.

What stands in the way

  • Verified The stream buffer takes the rear corner of the lot out of the buildable envelope entirely.
  • Inferred A drainage easement likely crosses the south side of the lot. The plat doesn't show it, but the neighboring parcel's does.
  • Unknown Soil report: nothing on file for this parcel or its immediate neighbors.

What it takes

  1. A critical areas review for the stream buffer, routine when the structure stays outside it, 2–4 week turnaround.
  2. A boundary survey, to confirm the easement question above before design starts.
  3. A standard building permit; no pre-application meeting required at this size.

Feasibility answers what fits and what's in the way, not what it costs, and not what the city's been saying about this area lately. Fullscope adds both: a budget, and the civic record.

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Sample Fullscope

A sample lot, read A 60 by 140 foot lot drawn to scale. A 20 foot front setback and 5 foot side and rear setbacks trim the edges, a stream buffer takes the rear corner, and about 2,300 square feet behind the existing house stay buildable. SAMPLE LOT · DRAWN TO SCALE STREET STREAM BUFFER HOUSE ~2,300 SQ FT CLEAR TO BUILD 140 FT DEEP 60 FT - - - SETBACKS: 20 FT FRONT · 5 FT SIDE & REAR

123 Example St, Olympia, WA

Parcel 00000-000-000 · City of Olympia · sample report

What fits

A detached accessory structure fits: roughly 2,300 sq ft of buildable envelope behind the house, clear of the stream buffer.

What stands in the way

  • Verified The stream buffer takes the rear corner of the lot out of the buildable envelope entirely.
  • Inferred A drainage easement likely crosses the south side of the lot. Confirm with a boundary survey before design starts.

The numbers

Preliminary budget for a 1,200 sq ft detached structure. Vertical and horizontal are kept apart because they move for different reasons, and every line is an allowance until it is quoted.

Budget lineEstimate
Vertical: shell, interior and finishes (1,200 sq ft at $210–$260 per sq ft)$252,000–$312,000
Horizontal: site prep, foundation excavation and drainage$18,000–$26,000
Horizontal: sewer and water service extension$14,000–$22,000
Fees: itemised below$15,000–$21,500

Preliminary budget: roughly $299,000–$381,500.

FeesEstimate
Critical areas review$400–$800
Boundary survey$1,800–$2,600
Building permit & plan review$3,200–$4,100
Impact & utility connection fees$9,600–$14,000

The civic record

  • Verified No active moratorium on accessory structures in this jurisdiction as of the report date.
  • Inferred A pending code update would raise the impact fee schedule roughly 8% if adopted before permitting. The city council's next reading is scheduled, not yet voted.

This is everything Feasa looks at for one property: what fits, what's in the way, what it would cost to build, and what the city might change next.

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How it works

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  • Then ask Feasa. With a Feasibility or Fullscope, ask about any finding, right on your study.