Prefab and modular homes

{{whyLabel}}: Prefab base prices are misleading; site work and land often double the initial quote.

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• Allocate 50% for the home unit, 25% for land, and 25% for site prep/permits.
• Use 2026 benchmarks: $150–$300 per sq. ft. for a fully installed modular home.
• Include a 15% contingency fund for unexpected utility or soil issues.

{{doneWhenLabel}}: A detailed spreadsheet exists showing a total estimated cost including land and site work.

{{whyLabel}}: Each type has different building codes, financing options, and long-term resale values.

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• Modular: Built to local codes, permanent foundation, highest resale value.
• Manufactured: Built to HUD code, often cheaper but harder to finance traditionally.
• Panelized: Wall panels shipped to site; offers the most design flexibility but higher on-site labor.

{{doneWhenLabel}}: One specific construction method is selected based on budget and local zoning.

{{whyLabel}}: Traditional mortgages don't cover the construction phase; you need a loan that converts once the home is set.

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• Look for 'One-Time Close' loans to lock in 2026 interest rates early.
• Prepare a 20-25% down payment, as lenders view prefab construction as higher risk.
• Ensure the lender is familiar with 'off-site construction' draws.

{{doneWhenLabel}}: Pre-approval letter for a construction-to-permanent loan is received.

{{whyLabel}}: Working backward from your move date ensures you meet notice periods for your current residence.

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• Set a target date 8 months from today (average 2026 modular timeline).
• Mark the 'Notice to Vacate' date for your current rental/home 60 days prior to move-in.
• Account for a 4-week buffer for potential factory or weather delays.

{{doneWhenLabel}}: A master calendar is created with the move-in date as the anchor.

{{whyLabel}}: Many municipalities have restrictive covenants or minimum square footage requirements that exclude certain prefabs.

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• Visit the local planning department to check for 'ADU' or 'Modular' specific ordinances.
• Confirm that 'Stick-built equivalent' modular homes are permitted on your specific lot.
• Check for 'Architectural Review Board' (ARB) requirements in your neighborhood.

{{doneWhenLabel}}: Written confirmation from the city that your chosen home type is allowed on the lot.

{{whyLabel}}: Soil stability determines foundation type, and 'Perc' tests are mandatory for septic systems in rural areas.

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• Hire a geotechnical engineer to test for load-bearing capacity.
• If off-grid, ensure the soil can handle a septic leach field.
• Use results to decide between a slab, crawlspace, or full basement foundation.

{{doneWhenLabel}}: A certified soil report and (if applicable) septic permit approval.

{{whyLabel}}: Permitting is the most common cause of project delays in 2026.

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• Submit the 'Factory-Approved' blueprints to the local building department.
• Apply for temporary electrical service for the construction site.
• Pay 'Impact Fees' which can range from $2,000 to $15,000 depending on the region.

{{doneWhenLabel}}: Building permit application is 'In Review' or 'Approved'.

{{whyLabel}}: Modern manufacturers offer superior energy efficiency and faster 'Set Days'.

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• Prioritize companies offering 'Passive House' or 'Net Zero' ready modules.
• Check for 2026 lead times; top-tier factories may have a 6-month backlog.
• Verify the manufacturer's delivery radius to minimize transportation costs.

{{doneWhenLabel}}: A signed contract with a manufacturer and a production slot secured.

{{whyLabel}}: Changes after production starts are extremely expensive or impossible in modular builds.

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• Kitchen: Ensure 'Work Triangle' efficiency and specify induction cooktops (2026 standard).
• Bedrooms: Plan for built-in storage to maximize smaller prefab footprints.
• Tech: Specify 'Smart Home' hubs and CAT6e wiring during the factory rough-in phase.

{{doneWhenLabel}}: Finalized, signed-off design drawings for the factory.

{{whyLabel}}: Prefab homes are airtight; they require specialized ventilation for air quality.

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• Choose an Air Source Heat Pump (ASHP) for heating and cooling.
• Mandatory: Include an Energy Recovery Ventilator (ERV) to ensure fresh air exchange.
• Opt for triple-pane windows to match the high R-value of modular walls.

{{doneWhenLabel}}: HVAC and insulation specs are included in the factory order.

{{whyLabel}}: Most manufacturers only deliver the box; you need a local pro for the foundation and utilities.

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• Find a GC experienced in 'Modular Sets' and crane coordination.
• Task them with clearing the lot, grading for drainage, and building the driveway.
• Ensure they are ready to receive the modules on the scheduled 'Set Day'.

{{doneWhenLabel}}: Signed contract with a local GC for site preparation.

{{whyLabel}}: The foundation must be perfectly level (within 1/8 inch) for modular sections to fit.

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• Pour the concrete foundation (slab or stem wall) according to the manufacturer's 'Bolt Pattern'.
• Trench and install water, sewer/septic, and electrical conduits to the 'Stub-up' locations.
• Verify the crane pad is compacted and level to support the 100-ton delivery crane.

{{doneWhenLabel}}: Foundation is cured and utilities are ready for hookup.

{{whyLabel}}: This is the most critical 24 hours of the project; timing must be perfect.

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• Confirm the crane arrival time and ensure the street is cleared for wide-load trailers.
• Have the 'Set Crew' ready with specialized jacks and 'Come-alongs' for alignment.
• Ensure the GC is on-site to oversee the weatherproofing of the roof 'Hinge' immediately after setting.

{{doneWhenLabel}}: All modules are placed on the foundation and the building is weather-tight.

{{whyLabel}}: Modular homes arrive 80-90% finished, but the 'Marriage Lines' (where sections meet) need finishing.

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• Patch and paint the drywall at the marriage lines.
• Connect the electrical and plumbing 'Chases' between modules.
• Install the final flooring transitions and trim work.

{{doneWhenLabel}}: Interior is seamless with no visible joints between modules.

{{whyLabel}}: You cannot legally move in or convert your construction loan without this document.

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• Schedule final inspections for plumbing, electrical, and structural safety.
• Ensure the ERV (ventilation) and smoke detectors are fully operational.
• Submit the final 'As-Built' survey to the building department.

{{doneWhenLabel}}: Physical Certificate of Occupancy is in hand.