PROPERTY FEASIBILITY GUIDES
Sample studies, permit rescue notes, and small-development playbooks.
Use these plain-English guides to understand where ADU, DADU, duplex, fourplex, land acquisition, stormwater, SWPPP, permit resubmittal, pro forma, and construction-support issues usually show up. These are starting points, not city determinations or stamped design work.
Why DADU projects stall before they reach approval
DADUADUPermit pathTacoma
Detached ADU projects usually stall for boring reasons, not because the idea is bad. The common failure is starting with a floor plan before checking zoning, alley or driveway access, tree impacts, sewer and water routing, stormwater, height, privacy, and whether the city will need a site development review.
In Tacoma, Seattle, Bellevue, Kirkland, Everett, and other Puget Sound cities, a backyard cottage can look simple until the project meets the real site conditions. A narrow side yard, a large tree, an old sewer route, a grade change, or a neighbor-facing window issue can force redesign after money has already been spent.
What to check first
- Check zoning and ADU/DADU standards before buying plans.
- Confirm access, utility path, stormwater, and tree constraints early.
- Ask whether the project needs a survey, civil input, arborist, geotech, or pre-application meeting.
- Do not treat a builder’s model plan as automatically buildable on your lot.
Lot & Line’s Free Feasibility Snapshot can flag whether a DADU path is worth exploring. The paid Property Snapshot goes further with permit questions, risk notes, and next-step guidance.
How to know if a Tacoma lot can support more units
Tacomamiddle housingduplexfourplex
The first question is not only lot size. A Tacoma lot may need to be reviewed for zoning, legal lot status, frontage, access, height, floor area, tree canopy, utilities, stormwater, parking assumptions, transit context, and whether a bonus path or affordability requirement changes the math.
A property can be a good candidate on paper and still be a poor first project if the access, drainage, power, sewer, or geometry makes it expensive. A small developer needs to know the difference before paying for full design.
What to check first
- Confirm the current Tacoma zoning and whether the parcel is a legal lot of record.
- Check whether ADU/DADU, duplex, fourplex, townhome, or small multifamily paths deserve testing.
- Look for site constraints: alley, slope, tree, stormwater, sewer, and power service.
- Use nearby permit examples as clues, not proof.
This is where a quick score can be useful: not a buildability promise, but a first read on whether the property deserves a deeper feasibility study.
What to do when your permit is awaiting resubmittal
permit rescueresubmittalcity commentsowner support
A permit waiting on resubmittal is not dead, but it can bleed time when nobody owns the correction strategy. The problem is often scattered comments, unclear responsibility, missing exhibits, or an owner who assumes the architect, engineer, contractor, and city are all aligned when they are not.
The fastest path is to organize every comment by discipline, identify who must answer it, separate design decisions from documentation gaps, and decide whether the next response needs a planner email, formal revision, civil update, utility confirmation, or meeting.
What to check first
- Build a correction matrix: comment, responsible party, needed exhibit, status, and due date.
- Separate zoning/site comments from building-code and engineering comments.
- Ask whether a city clarification call can prevent another bad resubmittal.
- Do not let the owner become the project manager by accident.
A paid Permit Rescue Audit can turn the comment letter into a clear action plan before another round of review is wasted.
Why your architect may not be enough
architectcivilsurveycoordination
An architect may be the right person for the building, but many small projects fail in the space between architecture and site reality. Survey, civil, stormwater, arborist, geotech, structural, utility, contractor, and jurisdiction coordination can sit outside the architect’s basic scope.
This does not mean the architect is doing anything wrong. It means the owner needs to know who is responsible for zoning strategy, site development, utility applications, permit sequencing, cost risk, contractor scope, and city communication.
What to check first
- Ask what is included and excluded from the architect’s proposal.
- Confirm who handles site plan coordination, civil direction, stormwater, and permit comments.
- Identify which consultant should be hired before drawings get too far.
- Use an owner-side coordinator when the project has many moving parts.
Lot & Line helps owners understand the full consultant map before money is spent in the wrong order.
How small developers lose money before construction starts
small developerpre-developmentpro formapermits
Small developers often lose money before a shovel hits the ground because they buy the wrong site, underprice soft costs, skip due diligence, assume the best permit path, ignore utility timing, or ask for contractor pricing before the scope is defined enough to mean anything.
Pre-development is where the cheap decisions are made. Once survey, design, civil, geotech, arborist, legal, lender, utility, and permit costs stack up, a weak project can become expensive to abandon.
What to check first
- Run feasibility before full design, not after.
- Separate land cost, soft costs, sitework, vertical construction, contingency, financing, and carry costs.
- Model conservative rent/sale scenarios instead of best-case numbers.
- Check whether the site has a path to permits, utilities, and construction access.
A Feasibility / Permit Path Review gives a small developer a decision filter: proceed, revise, pause, or walk away.
How to rescue a project before selling the land
project rescuelandfeasibilityexit strategy
Owners often decide to sell land because the project feels impossible, not because the land has no value. Before selling, it is worth checking whether the issue is zoning, site constraints, missing consultant scope, unrealistic unit count, bad cost assumptions, city comments, or a weak development sequence.
Sometimes the answer is still to sell. But a cleaner feasibility package can help the owner sell with better story, answer buyer questions, or keep a smaller build path alive.
What to check first
- Identify what stopped the project: code, cost, access, utilities, comments, or team breakdown.
- Test a simpler development path before abandoning the property.
- Package the site with clear knowns, unknowns, and next steps for a buyer or partner.
- Use feasibility work to improve either the project or the exit.
A rescue review can turn a stuck parcel into a clearer decision: develop, partner, hold, or sell with better positioning.
Stormwater plan, SWPPP, TESC, and drainage: why site work changes the budget
stormwaterSWPPPTESCsite development
Stormwater is one of the fastest ways for a small project to become more expensive than expected. Local jurisdictions may call the early pieces a stormwater plan, drainage report, site development plan, erosion control plan, SWPPP, TESC plan, ESC plan, or temporary erosion and sediment control package.
The words change by city and county, but the owner’s problem is the same: where does water go during construction and after the project is built, and who is preparing the drawings/calculations the reviewer expects?
What to check first
- Check new and replaced hard surface early.
- Ask whether the project needs civil engineering, infiltration testing, drainage details, or construction-phase erosion control.
- Budget for sitework, utility trenching, frontage/ROW work, and stormwater facilities before assuming vertical construction is the main cost.
- Do not let stormwater be discovered after architecture is already far along.
Lot & Line can help identify the likely stormwater/site-development questions and coordinate with civil engineers when stamped work is needed.
Land acquisition guide: what to check before buying a development site
land acquisitionvacant landdue diligenceutilities
Cheap land is often cheap for a reason. Before buying, the first pass should look at zoning, allowed uses, access, road standards, utilities, septic/well potential, critical-area layers, slopes, flood or shoreline issues, fire access, easements, title concerns, and whether the project type has a realistic path to permits.
A land acquisition review does not need to answer everything on day one. It needs to separate exciting from buildable, and buildable from financeable.
What to check first
- Confirm zoning, allowed uses, and development standards.
- Verify physical and legal access, not just a driveway-looking path.
- Check utility availability, extension distance, septic/well issues, and power lead times.
- Budget for survey, civil, geotech, arborist, environmental, and permit costs.
Lot & Line’s Land Red Flag Scan can help buyers, agents, and investors decide whether a parcel deserves a paid due-diligence review before closing.
Accounting and pro forma development for small projects
pro formadevelopment accountingdrawslenders
A small development project needs more than a rough construction number. A useful pro forma separates land, acquisition costs, design, survey, civil, geotech, permits, utility connections, sitework, vertical construction, contingency, financing, insurance, taxes, reserves, operations, rent/sale assumptions, and exit strategy.
The accounting system should match the way the project is funded. If a lender, investor, or owner reimbursement is involved, costs need to be coded clearly enough to support draws, reports, reimbursements, and tax records.
What to check first
- Create a cost-code structure before invoices start coming in.
- Track soft costs, hard costs, owner contributions, reimbursements, and reserves separately.
- Use conservative rent, vacancy, operating expense, and financing assumptions.
- Update the pro forma when design, permit, or bid realities change.
Lot & Line can support feasibility-level pro formas and development cost tracking workflows so the owner understands the numbers before the project controls them.
How agents can talk about ADU, DADU, and middle-housing potential without overpromising
real estate agentslistingbuyerADU potential
Development potential can help a listing stand out, but agents need to be careful. Saying a property has ADU, DADU, duplex, or fourplex potential without checking zoning, site constraints, utilities, trees, access, and permit history can create trust issues later.
The safer approach is to say that the property may be worth reviewing, then support that claim with a feasibility snapshot, city verification steps, and clear disclaimers.
What to check first
- Use phrases like “worth reviewing for ADU/DADU or middle-housing potential,” not “approved for.”
- Send buyers and sellers through a third-party feasibility review when the claim affects value.
- Flag unknowns before they become negotiation problems.
- Keep Lot & Line credited so the agent looks helpful without pretending to be the permit expert.
Agent Property Potential Snapshots can help agents support listings, buyer questions, investor clients, and pricing conversations without guessing.
Before signing a restaurant lease, check the space first
restauranttenant improvementhealthlease
A restaurant space can look perfect and still be expensive to open if the use, occupancy, hood/venting path, grease interceptor, restrooms, plumbing, electrical, gas, fire, accessibility, health department requirements, or landlord scope does not line up with the concept.
The time to find that out is before the lease is signed or during the contingency period, not after rent starts.
What to check first
- Map the menu, equipment, seating, restrooms, venting, grease, utilities, and health triggers.
- Ask what the landlord will deliver and what the tenant must build.
- Check whether change of use, fire, building, health, or signage permits are likely.
- Use a lease-risk review before committing to a space.
Lot & Line can pair layout/design direction with permit-path awareness so food and small commercial owners avoid signing into a bad shell.
Want an address-specific first look?
Send one property through the Free Feasibility Snapshot. If the opportunity deserves more review, Lot & Line can prepare a paid Property Snapshot, feasibility audit, permit rescue plan, or full development-support path.
