Wildfire Planning for New Construction: The Complete Guide

Wildfire resilience is most effective when it is designed into a new home from the beginning rather than added after construction. Site planning, structure hardening, water, power, access, landscape and active protection systems should be coordinated as one property-wide strategy.

Start Before Schematic Design

The best time to establish wildfire objectives is before the home, driveway, utility routes and landscape plan are fixed. Early decisions influence exposure, construction cost, system feasibility and long-term maintenance.

Core Planning Priorities

• Evaluate slope, aspect, wind, vegetation and neighboring exposure.
• Position the structure to reduce terrain-driven and ember exposure where feasible.
• Coordinate fire apparatus access, turnarounds, gates and address visibility.
• Design Zone 0 and defensible space alongside the architecture.
• Select ignition-resistant roofing, vents, cladding, glazing, decks and exterior assemblies.
• Reserve space and utility capacity for water storage, pumps, controls and backup power.

Site and Building Integration

Wildfire planning should be reflected in civil, architectural, structural, landscape, plumbing, electrical and controls documents. Treating these elements separately often produces conflicts, undersized infrastructure and expensive redesign.

Water Strategy

Confirm the available water sources, legal use constraints, refill capability, required runtime and storage volume. Locate tanks, vaults, pumps, filters and distribution piping early enough to coordinate grading, excavation, electrical service and maintenance access.

Power and Controls

Determine pump starting loads, outage duration, generator or battery strategy, automatic transfer, communications and local manual operation. Wildfire systems should not depend on a single fragile power or internet connection.

Landscape and Access

Coordinate irrigation, plant placement, tree spacing, hardscape, propane or fuel storage, gates and emergency access with the site plan. Avoid creating attractive architectural or landscape features that introduce continuous fuel paths to the structure.

Design Team Coordination

Assign responsibility for hydraulic criteria, electrical loads, penetrations, equipment spaces, trench routes, drainage, freeze protection, controls and commissioning. Written performance requirements help prevent gaps between designers and contractors.

Construction-Phase Verification

Review substitutions, concealed work, sleeve locations, pipe routing, equipment access and utility capacity before finishes are installed. Photograph and document underground and concealed components.

Commissioning and Turnover

Complete pressure and flow testing, controls verification, backup-power testing, source switching, alarm checks and owner training. Final documentation should include drawings, equipment schedules, settings, maintenance requirements and acceptance results.

Good, Better and Best

Good

Code-compliant construction with ignition-resistant materials, defensible space and verified emergency access.

Better

Integrated water, backup power, controls, irrigation and property-wide wildfire planning coordinated during design.

Best

Independent risk assessment, performance-based engineering, redundant water and power, active exterior protection, documented commissioning and a long-term inspection program.

New Construction Checklist

• Complete a property-specific wildfire assessment before design is finalized.
• Identify the authority having jurisdiction and applicable requirements.
• Document water, power, access and communications assumptions.
• Coordinate architectural and landscape ignition zones.
• Reserve equipment space, trench routes and service capacity.
• Establish testing and commissioning requirements before bidding.
• Require complete turnover documentation and owner training.

Common Mistakes

• Waiting until construction is nearly complete to consider wildfire systems.
• Assuming municipal water, wells or generators can support the required demand without testing.
• Allowing disciplines to design independently without shared performance criteria.
• Specifying equipment without planning maintenance access, drainage or freeze protection.
• Relying on landscaping alone while ignoring ember entry and structural vulnerabilities.

Frequently Asked Questions

When should wildfire planning begin?

Ideally during site selection or conceptual design, before major architectural, civil and utility decisions are fixed.

Does code compliance make a home wildfire-proof?

No. Codes establish minimum requirements. Actual exposure, construction quality, surrounding fuels, water, power and maintenance still determine performance.

Should an exterior sprinkler system be designed before the house?

Its performance requirements should be established early enough to influence water storage, pump space, electrical capacity, piping routes and architecture.

Who should coordinate the wildfire scope?

A clearly designated owner representative, consultant or lead designer should manage responsibilities, interfaces, documentation and acceptance criteria.

Start with a property assessment to establish wildfire design criteria before construction decisions become expensive to change.