Describe the home and the usable rights before selecting sales
A Woodacre home with land needs a comparison built around what a buyer can actually own, use and maintain. Total acreage is one input, alongside the residence, usable outdoor areas, access, infrastructure and restrictions. Two properties with similar gross land areas may offer very different ownership experiences. A townwide price per acre cannot explain those differences without evidence that comparable buyers respond to them in a consistent way.
This article provides an original local evidence and comparable-selection method. No permissioned MLS export, verified closed-sale sample, subject inspection or broker-authored valuation was supplied. The verified sample is zero; no price opinion or dollar adjustments are presented. Use the Woodacre guide for community orientation and the selling process guide for the broader preparation sequence. The Marin County guide supplies context rather than a substitute pricing sample.
Separate gross acreage from the areas relevant to ownership
Build a subject map showing the residence, access, maintained grounds, wastewater areas, relevant easements and land whose use needs further investigation. Identify the source of every boundary or designation. Keep reported land area separate from a professional’s delineation of a usable area. Aerial appearance alone cannot establish that an open area can support a new building, driveway or septic improvement.
A dated Woodacre example illustrates the distinction. The County’s July 10, 2006 Summit Drive staff report describes a 24.63-acre proposal with building envelopes, septic areas and proposed conserved land. It is a historical review document, not evidence of the eventual subdivision, present permissions or a current sale. Its relevance here is the need to distinguish land functions before comparing acreage figures.
For the subject, have the appropriate reviewers identify which uses are documented and which remain proposals. Record overlapping uses rather than simply subtracting every mapped area from total acreage. An easement can affect a use without making the land physically inaccessible; a wooded area can be valuable to an owner without supporting an additional structure. The comparison should describe the actual attribute and the evidence, not reduce all nonbuilding land to a single residual category.
Keep housing inventory capacity outside the existing-home sample
The County’s West Marin Housing Element inventory includes the Woodacre Fire Station site. An inventory of potential housing locations is not a list of closed residential sales. Do not treat its unit capacity as an approved private development opportunity or multiply that capacity by an assumed home price to value unrelated land.
Apply the same eligibility test to every candidate record. Does it describe a completed residential transaction, a current asking price, an unbuilt proposal or a public planning assumption? Label the type before deciding whether it belongs in the analysis. A useful public document can inform subject research while being unsuitable as a comparable sale. Keeping that distinction visible prevents an impressive-looking grid from combining fundamentally different evidence.
Compare the existing residence before assigning value to improvements
Prepare a consistent description of the subject’s residence: documented living area, layout, condition, effective utility and the status of relevant work. Separate garages, storage, accessory structures and other areas whose classification differs. If the listing, assessor and permit records disagree, retain the competing figures with their sources until a qualified reviewer resolves the relevant categories. Do not choose the largest figure simply to make a price-per-square-foot comparison look favorable.
For improvements such as a workshop, gate, retaining structure or private utility equipment, establish what exists and what evidence supports its use. Cost, condition and contribution to market value are different questions. A recent invoice documents spending within its scope; it does not demonstrate that buyers will pay the same amount more. The future valuation should consider whether the improvement is useful to the competitive buyer group and whether comparable evidence supports its treatment.
List deferred work separately from optional personalization. A repair quotation should identify the scope, date and assumptions. Avoid applying the same issue twice through both a broad condition adjustment and a separate line without explaining the method. Where the work remains uncertain, tell the reviewer what investigation could change the description or the candidate selection rather than inventing a precise deduction.
| Comparison field | Subject evidence needed | Candidate-sale test | Current result |
|---|---|---|---|
| Land and rights | Legal description, maps, relevant instruments and professional review | Comparable usable functions and documented rights | No subject rights determined |
| Residence | Consistent area categories, layout, condition and work history | Similar utility with reconciled differences | No inspected home or verified sale |
| Water / wastewater | Actual service, approved system and current evaluation | Identify materially different responsibilities | No private system findings |
| Access / grounds | Route duties, actual site evidence, maintained versus other land | Compare ownership experience rather than gross acres alone | Private obligations unresolved |
| Transaction | Permissioned data, status, dates, price and terms | Verify closing and relevant concessions | Zero eligible transactions assembled |
| Adjustment / reconciliation | Qualified market analysis and documented method | Explain evidence and candidate weighting | No coefficients, price range or appraisal supplied |
Verify water, wastewater and access without pricing uncertainty by instinct
The County’s Woodacre wastewater project history provides community context, not a condition report on a subject’s system. Obtain the property’s actual records and evaluation. If a comparison home has a different arrangement, describe the responsibilities and evidence before considering any market effect. A widely discussed community issue does not establish a standard discount for every home in the area.
Access deserves similar treatment. A longer approach may involve additional land, shared obligations or structures that need assessment; it may also offer attributes a buyer values. Identify the relevant differences rather than assuming that distance alone is a negative adjustment. The qualified analyst needs evidence about the properties and the market response. A repair budget and an inferred market adjustment should not be treated as interchangeable figures.
Keep possible future changes out of the base subject description until their status is established. A proposed utility project, anticipated rule update or potential additional dwelling can become a scenario for further investigation. State the conditions and missing evidence. Do not silently value the existing home as though that future scenario is already permitted, funded and complete.
Assemble a transparent transaction sample
Before collecting prices, state the effective date, intended property segment, initial geographic search and time window. Preserve an exclusion log explaining why a candidate was rejected or retained with qualifications. If the sample is thin, have the analyst explain any expansion in geography or time and the resulting limitations. Expanding a search to force a convenient result weakens the analysis even when the resulting table contains more rows.
The County sales-data page cautions that its summaries serve assessment-roll production. No transactions were extracted for this draft. A future professional analysis should verify candidate details with appropriate sources and publish only information for which it has the necessary rights. A transfer record can start an investigation without resolving condition, concessions or the full nature of the sale.
Fannie Mae’s comparable-adjustment guidance calls for market-supported treatment of differences rather than arbitrary rules. It also distinguishes transaction terms and the relevant market timing. That is methodological guidance, not a Woodacre coefficient or certification of this article. A named professional must still assemble and explain the actual local evidence before supplying a price conclusion.
Make the final reasoning reviewable
Keep a version record when a candidate’s description changes. Note whether the revision concerns a corrected area, a newly obtained permit, an amended transaction detail or a fresh condition report. Explain whether the change affects eligibility, weighting or only the narrative. This prevents a corrected number from appearing in the final grid without an explanation of how it changed the reasoning, and lets another reviewer reproduce the analysis using the same evidence.
When a qualified analyst eventually provides a comparison, ask which properties carry the most weight and why. Check that the description used in the grid matches the underlying file and that unresolved conditions remain visible. If new evidence changes the subject’s usable area, approved layout or responsibilities, revisit the selection and conclusion rather than simply adding another adjustment to preserve the original price.
A seller can prepare now by reconciling the property facts and gathering permissioned records. A buyer can use the same ledger to identify the questions that matter before relying on a price comparison. The current deliverable is a complete research framework, not a completed CMA. Its numerical fields remain intentionally unpriced until verified transaction evidence and named broker or appraiser analysis are available.
