San Luis Valley
VerifiedCostilla County
- Citations
- 2
- Land snapshot
- Jun 3, 2026
- Source coverage
- 5/5
Major comparison layers are present for county-level discovery.
Comparison
Costilla County vs Washington County
Side-by-side discovery metrics for alternative housing research.
Comparison boundary
Compare Counties, Then Verify Parcels
Side-by-side scores can narrow your search, but parcel feasibility still depends on zoning, access, water, septic, covenants, permits, and current county review.
Freedom Score8171
Population3,6864,771
Density3 / sq mi1.9 / sq mi
Tiny Homes4/53/5
RV Living3/52/5
Off Grid4/54/5
Solar Potential10/108/10
Broadband8/108/10
Public Land24,694 acres3,574 acres
Recreation Access2/52/5
Source confidence
Comparison Confidence Strip
Fast trust signals for this county pair: citation depth, land snapshot date, and whether both profiles include the major sourced layers used in comparisons.
Eastern Plains
VerifiedWashington County
- Citations
- 2
- Land snapshot
- Jun 3, 2026
- Source coverage
- 5/5
Major comparison layers are present for county-level discovery.
Quick answers
Which County Looks Better?
Costilla County leads on Freedom Score
Costilla County has the stronger overall Freedom Score, making it the better broad discovery candidate before parcel-level review.
Costilla County leads on tiny home signal
Costilla County has the stronger tiny home discovery score. Still verify whether the structure is treated as a dwelling, modular/manufactured home, ADU, or RV-like unit.
Costilla County leads on RV living signal
Costilla County is the better RV-living research lead, but full-time occupancy still needs county confirmation and parcel-specific sanitation review.
Costilla County and Washington County are close on off-grid signal
Both counties are close for off-grid research. Solar, access, winter conditions, water rights, well feasibility, and septic will likely decide the better parcel.
Land affordability is close
Washington County has the lower county-level price-per-acre snapshot at $4,051. Treat this as a market signal, not a parcel appraisal.
Best For
- Cheap land research
- Off-grid project research
- Permit-savvy rural buyers
- Solar-oriented land search
Pros
- Official planning resources are available online
- County requires land use permits and provides permit checklists
- Temporary RV during construction materials are listed
- Strong solar and rural land appeal
Cons
- County tells buyers to review the Land Use Code before purchase or land changes
- RV occupancy appears temporary/construction-linked unless separately approved
- Permanent container housing is not clearly confirmed
- Address, road access, OWTS, inspections, and building-code requirements can control feasibility
Red Flags
- Review the Land Use Code before purchase
- Do not treat temporary RV construction permits as permanent RV living
- Do not assume permanent container homes are allowed
- Confirm OWTS, address, access, utilities, wind load, snow load, and inspection requirements
RV Living
Costilla County lists a Temporary RV Occupancy During Home Construction permit and a Mobile Home Park and RV Park checklist. Score this as permit-based temporary/construction RV use, not confirmed full-time RV living on raw land.
Off Grid
Off-grid projects are plausible but compliance-heavy. The county permit list highlights OWTS, physical addressing, road access, utility, site plan, inspection, floodplain, and building-code requirements that can determine whether rural land is actually occupiable.
Water and Septic
Verify well, cistern, hauled water, and soil evaluation requirements with county and state water authorities before purchase. A physical address is not issued to vacant land according to the county planning page.
Planning resources include OWTS permit and occupancy inspection materials. Septic/OWTS should be treated as a core prerequisite for occupancy research.
Best For
- Eastern Plains acreage research
- Solar-oriented rural land
- Agricultural zoning review
- Affordability research
Pros
- Planning and Zoning page is detailed
- Building permits are required for residences including mobile/manufactured homes
- Single residence and multiple-residence land-use pathways are described
- Well, septic, address, and road access permit references are listed
Cons
- Temporary moratorium on RV parks is listed
- Tiny homes and container homes are not clearly authorized
- Multiple residences under 35 acres need approval and septic review
- County tells users to call for specific information
Red Flags
- Do not assume RV park or RV residence approval
- Confirm building permit category for any tiny or manufactured/mobile dwelling
- Verify well, septic, address, road access, and Planning Commission/BOCC process
- Check town and subdivision rules
RV Living
RV living should be scored conservatively. Washington County lists a temporary moratorium on RV parks and tells users to call Planning and Zoning for specific information; permanent RV residence on private land is not clearly authorized by the public page.
Off Grid
Washington remains a plausible rural/off-grid research county because of low density, solar, and agricultural land context, but building permits, land-use applications, well/septic permits, address requests, road access permits, and Planning Commission/BOCC approval paths matter.
Water and Septic
Verify water service, well eligibility, water rights, hauled water/cistern rules, and adequacy requirements at parcel level before relying on Washington County for homesteading or off-grid use.
Verify septic/OWTS feasibility, soils, setbacks, and county or health-department review before assuming residential or RV occupancy is possible in Washington County.
Source context
Comparison Source Trail
This comparison uses verified county profile research plus sourced land, population, broadband, solar, public land, and scoring layers. Treat it as a county-level shortlist before parcel-level review.
Official County Research
Land and Market Layers
Infrastructure and Access
Costilla County broadbandCensus Reporter ACS 2024 5-year table B28002 snapshot from 2024Costilla County solarNASA POWER 2001-2020 solar irradiance climatology for 2001-2020Costilla County public landColorado State Basemap GIS public land layers snapshot from 2026Washington County broadbandCensus Reporter ACS 2024 5-year table B28002 snapshot from 2024Washington County solarNASA POWER 2001-2020 solar irradiance climatology for 2001-2020Washington County public landColorado State Basemap GIS public land layers snapshot from 2026
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