Dry Rot Repair Cost
Tacoma WA
Dry rot repair cost in Tacoma ranges from $1,500 for a spot repair up to $15,000 or more for major multi-area structural rot with siding rebuild. The spread is wide because dry rot pricing is driven by how far the infection has spread behind the surface material — and that boundary almost always extends further than what's visible. This guide breaks down the three scope tiers and what drives pricing inside each one.
- Three scope tiers with real Tacoma price ranges
- What actually drives the price inside each tier
- Lump-sum fixed pricing after $350 diagnostic
- 5-year written structural guarantee
- Spot repair: $1,500–$2,500
- Medium section: $3,000–$6,500
- Major multi-area: $8,000–$15,000+
- 5-year structural guarantee
$350 diagnostic credits 100% toward your repair.
Dry Rot Repair Cost in Tacoma, WA — Direct Answer
Dry rot repair cost is driven by the true extent of decay, which is almost never the visible extent — so the failure boundary is mapped with moisture meters and probing before any price is issued. Realty Repair Co. (APCON LLC, Washington General Contractor #APCONL*825QO) performs this work directly as the general contractor in Tacoma, Washington. Scope is confirmed on site with moisture meters and physical probing before any price is issued; the resulting repair contract is lump-sum fixed price, not hourly, and structural repairs carry a five-year written guarantee.
- Work performed
- cost drivers, failure boundary mapping, fixed-price proposal
- How it starts
- $350 forensic structural report — on-site, written, photographed. Credited 100% against the repair contract if you proceed.
- Pricing method
- Lump-sum fixed price issued after the failure boundary is confirmed. No hourly billing. No open-ended scope.
- Guarantee
- Five-year written guarantee on structural repairs.
- Licensing
- WA General Contractor #APCONL*825QO, bonded and insured. Work performed under the 2021 Washington State Residential Code (WAC 51-51, effective March 15, 2024).
- Not offered
- Crawl space encapsulation, waterproofing, basement finishing, painting, pressure washing, landscaping. Plumbing, electrical and mechanical are coordinated through separately licensed contractors per RCW 18.27.
- Contact
- 253-891-9622 · dispatch@realtyrepairco.com · 711 115th St S, Tacoma, WA 98444
Reviewed by Dindar Nasim, owner and Washington licensed general contractor (#APCONL*825QO) · Updated September 28, 2026
Spot Repair —
$1,500 to $2,500
Spot repair covers single-location dry rot that hasn't spread to adjacent structural members. The infection boundary is tightly contained, the repair is accessible without significant disassembly, and no structural shoring is required. This is the tier most homeowners hope they're in — and sometimes they are.
What Fits This Tier
- Single rotted window sill or trim
- One fascia section (under 8 feet)
- Single rotted soffit panel
- Small porch post base (non-bearing)
- Single deck board or trim piece
- Isolated siding plank with no sheathing involvement
What Pushes You Out of This Tier
- Sheathing rot discovered behind siding
- Framing member involvement (any structural wood)
- Multiple adjacent locations affected
- Active moisture source still present
- Access requires scaffolding or significant prep
- Evidence of fungal mycelium spread
Medium Section Repair —
$3,000 to $6,500
Medium section repair covers multi-bay sheathing, rim joist runs, multiple connected framing members, or exterior scope requiring siding removal across a wall section. Most Tacoma dry rot projects land in this tier — it's the realistic middle ground between spot and major structural scope.
Full Rim Joist Section
Rim joist rot across a multi-foot run with adjacent sill plate involvement. Typical in Tacoma crawl spaces where drainage or grade issues have concentrated moisture along one side of the foundation.
Exterior Sheathing Replacement
Siding removal reveals rot across multiple stud bays. Scope includes sheathing replacement, moisture barrier restoration, new flashing, and siding reinstall. This is the most common tier-2 finding.
Window Frame + Jack Studs
Window surround rot that has extended into jack studs or header ends. Requires window removal, framing repair, flashing correction, and window reinstall (or replacement if the frame is compromised).
Porch Post + Beam End
Porch post base rot with beam end involvement. Requires temporary shoring, post replacement, beam end excision and sistering or replacement, new flashing at post-to-concrete interface.
Major Multi-Area Repair —
$8,000 to $15,000+
Major multi-area dry rot repair covers structural framing across multiple locations, or cases where the dry rot has compromised bearing members that require temporary shoring and full replacement. This tier is less common but not rare — it's typical of older Tacoma homes where moisture problems have gone uncorrected for years.
Multi-Wall Sheathing & Framing
Dry rot has spread across two or more wall sections, involving sheathing, sill plates, and wall framing. Requires coordinated siding removal, framing rebuild, moisture management redesign, and staged reinstallation.
- Full perimeter scope assessment
- Moisture source correction (grade, flashing, drainage)
- Structural framing replacement
- New sheathing and moisture barrier
- New or restored siding matched to house
- Paint-ready finish throughout
Crawl Space Structural + Moisture
Dry rot throughout the crawl space affecting sill plates, rim joists, floor joists, and subfloor across multiple bays. Coordinated with crawl space moisture remediation — encapsulation, dehumidification, or perimeter drainage as the diagnostic reveals.
- Full crawl space scope mapping
- Temporary shoring for structural work
- Sill plate + rim joist replacement
- Floor joist sistering or replacement
- Subfloor replacement as required
- Moisture remediation coordinated concurrent
Deck Full Structural Rebuild
Deck dry rot affecting ledger, joists, beams, and post bases. Safety-critical scope requiring full disassembly, structural rebuild to current code, new flashing at ledger, and new decking.
- Ledger board removal and reflashing
- Joist and beam rebuild with treated lumber
- Post base replacement with proper hardware
- Code-compliant connection hardware
- New decking and railing
- Final inspection coordination
Roof Framing + Fascia System
Dry rot in rafter tails, fascia, and soffit that has extended into the roof framing system. Requires partial roof disassembly for access, framing rebuild, new flashing at roof-to-wall transitions, and coordinated roofing.
- Access scope via roofing removal
- Rafter tail rebuild or replacement
- Fascia and soffit replacement
- New drip edge and flashing
- Roofing reinstall coordination
- Gutter realignment
Four Variables That
Move Dry Rot Pricing
Inside each scope tier, four variables determine where the final bid lands. Understanding these helps you ask the right questions during your diagnostic.
Infection Extent
Visible rot is always less than actual rot. Infection extent is determined by probe testing and moisture metering across the affected area. This is the single biggest price driver and the main reason phone estimates are unreliable.
Moisture Source Correction
Correcting the moisture source is mandatory for a guaranteed repair. The correction scope varies: regrading, flashing repair, gutter correction, crawl space vapor barrier, or drainage redesign. If the moisture source isn't corrected, the rot returns.
Access & Prep
Scaffolding, temporary shoring, siding removal across a wall section, or roof-access staging all add prep scope. Access conditions in older Tacoma homes with tight crawl spaces or steep grades can materially affect total hours.
Finish Match
Matching existing siding, trim, or stain on older Tacoma homes sometimes requires custom milling or sourcing discontinued profiles. Painted surfaces are straightforward. Aged cedar or custom profiles add cost.
Dry Rot Service Pages
Related to This Cost Guide
If your situation doesn't fit a single scope tier or you need information on specific rot locations, these service pages go deeper. All pricing funnels back through the $350 forensic diagnostic.
Primary Service Page
Dry Rot Contractors Tacoma — the main dry rot remediation service page covering our full methodology, what we excise, how we treat the substrate, and the structural rebuild sequence.
Related Structural Pages
Dry Rot Repair Cost FAQ
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Dry Rot Repair Quote?
The $350 diagnostic maps the full infection boundary, documents it with photos, and produces a lump-sum fixed-price bid. If you proceed, the diagnostic fee credits 100% to the project.
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