Skip to main content

Can a Home Be Appraised Before a Boundary Line Adjustment Is Recorded?

Yes, a residential appraisal may be possible before a boundary line adjustment is recorded, but the report must answer a clearly defined question. Do you need the value of the property with its existing boundaries, or the value of a specified proposed configuration? A pending application, an approval and a recorded change are different facts. Send the documents and intended use before ordering so the appraiser can determine whether credible work is possible and which conditions the report would need.

This distinction matters before a private sale, family transfer or co-owner buyout involving a change to a residential lot. A report based on the proposed boundaries should not be read as an unconditional value of the property as it exists today.

Choose the property question before choosing the appraisal date

Start with one of these requests:

  • Existing configuration: value the identified residential property under its actual boundaries and rights on the requested date.
  • Proposed configuration: analyze the residence and land under a specific, documented boundary proposal, with appropriate conditions if the assignment can be supported.
  • A comparison: consider both configurations under an expressly agreed scope. Do not assume that a standard single-value order includes both.

If your question is instead whether two existing tax parcels should be valued together or separately, start with Alpha's two-parcel appraisal guide. The question here is narrower: how to describe the property when a boundary change has not yet been completed.

Approval and recording need separate evidence

Washington's RCW 58.17.040(6), in the version effective until January 1, 2028, addresses boundary adjustments that do not create an additional lot or leave insufficient building-site area and dimensions. A boundary adjustment should not be treated as an automatic way to create a new saleable building lot.

Snohomish County's BLA guidance describes adjustments between legally created lots and distinguishes approval from the later recording of approved documents. Its application process calls for legal descriptions, maps and supporting material; access and health review can also matter. Confirm the requirements with the authority governing the property, including the city where applicable.

Provide the actual written status: proposed, submitted, approved but not recorded, or recorded. Include outstanding conditions and document dates. A preliminary sketch or an email saying approval is expected does not establish that the proposed boundaries are already in place.

An appraisal condition does not complete the boundary change

A proposed-configuration appraisal can require a hypothetical condition when the analysis treats a known uncompleted change as though it existed on the value date. Uncertainty about a fact is a different problem and may call for an extraordinary assumption, further investigation or a different scope. The appraiser determines the appropriate treatment; the client's preferred label does not settle it.

The Appraisal Institute's Guide Note 15 explains these distinctions and the need for credible analysis and clear disclosure. A condition applies to the stated effective date. Calling a report “as is” can mislead if it actually values a configuration contrary to known facts.

The report does not survey the land, establish title, convey ownership or grant land-use approval. Ask your surveyor, title professional, attorney and permitting authority about their respective parts of the transaction. If the proposal remains too uncertain for a useful opinion, obtaining those answers first may be the better next step.

A proposed boundary is not a future market date

“Value after the adjustment” leaves two questions open: which property configuration, and which market date? A current-date analysis assuming a defined change is complete differs from a value opinion for a future date. Do not silently substitute one for the other.

Tell the appraiser whether the recipient needs today's market conditions, a specified historical date or a prospective date. For an estate or buyout, have the appropriate adviser identify the relevant date and property interest. A later boundary plan should not automatically be inserted into a historical valuation.

Send a before-and-after document package

Useful material to identify before engagement includes:

  • The residential address, every affected parcel number and current legal descriptions.
  • A dated map showing existing and proposed lines, with clearly identified versions.
  • The application, written decision, conditions of approval and recorded documents, to the extent available.
  • Information showing whether the change affects the residence, outbuildings, setbacks, access, utilities, well, septic system or reserve area.
  • The intended report users, decision, effective date and deadline, plus whether one configuration or a comparison is requested.

Identify missing items rather than filling gaps with guesses. King County's recorded-document guide notes that a local authority's boundary-adjustment identifier differs from the Recorder's recording number. Sending both when available can help distinguish the approval file from the recorded instrument.

Begin an inquiry with a brief description; arrange an appropriate way to share supporting documents after scope is discussed. Do not place confidential legal or financial documents in the general website inquiry.

Keep value, transaction price and financing separate

The cost of the survey and recording is not automatically the change in market value. Nor does a per-square-foot land calculation establish the value effect of moving a boundary. The analysis concerns the defined residential property and evidence relevant to that configuration.

An appraisal opinion does not decide equity, debt allocation, legal entitlement, tax treatment or the agreed payment for a transfer or buyout. Those decisions involve the parties and their advisers.

If financing or a release of collateral is involved, consult the lender before ordering. Fannie Mae's site policy requires the actual site rather than a hypothetical portion for its covered mortgage appraisal. That program rule is not a universal prohibition on private scenario analysis, but it shows why a private report should not be assumed acceptable for a loan. See Alpha's mortgage and private-appraisal guidance.

Questions to settle before ordering

Should I wait until the adjustment is recorded?

If the recipient needs value of the completed configuration without an uncompleted-change condition, waiting for the required evidence may be appropriate. If you need information to decide whether to proceed, discuss a defined proposed-configuration assignment first. Neither route is automatically suitable for every property.

Can an appraisal guarantee the boundary proposal will be approved?

No. A value opinion under stated conditions is not an approval prediction or a promise that the proposed transfer can close.

What if the approved or recorded plan changes?

Send the changed documents to the appraiser and intended recipient. Do not reuse an opinion for a materially different configuration without determining what additional work is needed.

Request a residential appraisal quote

For a residence in King County, Snohomish County or Skagit County, describe the boundary proposal, its current status and the decision the report will support. Include the property address, requested value date, intended users and deadline.

Call 425-753-1971, email dustin.labrasseur@gmail.com or request an appraisal quote. Residential appraisals start at $695. A proposed configuration or multiple opinions can require additional work; Alpha will confirm property fit, scope, fee and availability before scheduling.

Sources checked October 24, 2026

  • Washington Legislature: RCW 58.17.040(6), version effective until January 1, 2028, linked above.
  • Snohomish County: Boundary Line Adjustments; current guidance linked above.
  • King County Archives: Recorded documents; boundary/lot line adjustment records guidance linked above.
  • Appraisal Institute: Guide Note 15, Assumptions and Hypothetical Conditions, effective November 19, 2015, with minor revisions in 2018; linked above. This is professional guidance, not a replacement for the applicable standards.
  • Fannie Mae Selling Guide B4-1.3-04, dated June 4, 2025; current page linked above. The cited requirement is specific to its lending program.