Porch Column and Post Repair
Porch columns rot from the bottom up, where water sits on the base, and from the top down, where the beam above leaks into them. We shore the porch roof, replace the column on a raised base and wrap it in material that will not rot again.
Before
AfterPost rebuilt and wrapped
How we approach porch column repair
Most rotted porch columns we see were installed sitting flat on concrete or a deck, with no gap for water to drain. Hollow wood columns also trap moisture inside. The rot often starts hidden behind paint or a decorative wrap, and by the time the base looks soft the post inside can be badly weakened.
We support the porch roof or balcony with temporary posts, remove the old column, and check the beam and footing. The new structural post goes on a raised galvanized base, and we finish it with a PVC or primed wood wrap, a vented base trim and flashing at the top so the beam above sheds water instead of feeding the column.
If the beam or header above is also rotted, we repair it at the same time. Tapered and decorative columns can be matched with fiberglass or PVC columns that look like the originals but do not rot.
What the job includes
- Temporary shoring of the porch roof or balcony
- Old column or post removed
- Footing and beam checked and repaired as needed
- New pressure-treated post on a raised metal base
- PVC, fiberglass or wood column wrap
- Base trim, cap and flashing
- Prime and paint to match
How the job goes, step by step
Inspect
We probe the column, base, beam and footing.
Shore
Temporary support so the roof or balcony stays put.
Replace
New post on a raised base, beam repaired if needed.
Wrap and finish
Column wrap, trim, flashing and paint.
Recent rot repair projects
What porch column repair typically costs
| Project | Typical scope | Price range | Timeline |
|---|---|---|---|
| Repair a column base | Cut out rot at the base, new raised base and trim, sound post above | $800 – $1,800 | 1 day |
| Replace one column | Shore, new post on a raised base, wrap and paint | $1,500 – $4,500 | 1–2 days |
| Two or three columns | Front porch columns replaced and wrapped | $3,500 – $9,000 | 2–4 days |
| Columns and beam | Columns replaced plus a rotted beam or header above | $5,000 – $12,000 | 3–6 days |
Typical 2026 prices for Seattle, the Eastside and Snohomish County, calculated with the same labor rates we use in our own estimates plus current material prices. Your price depends on size, height, access, the products you choose and what we find once the area is open. Every estimate is free, in writing and based on an on-site visit.
Backed by a 24-month workmanship warranty
Written scope
You know exactly what is included before work starts, with photos of what we found.
Our own crew
The people who quote your job are the people who do it, start to finish.
Clean site daily
Debris is hauled away and your yard is left the way we found it.
24 months covered
If our workmanship fails within two years, we come back and make it right.
What homeowners say
“This concerns the work of a company hired to fix some troublesome spots on our home. They were able to rebuild and refinish a window frame that had deteriorated from weather damage over the years. They did an excellent job. That one fix made the house look…”
“Alex and his team did a great job fixing our siding and bottom door frame which had some rotting. They were professional, competitive in pricing and responsive. Highly recommend Eco Home Repair!”
“I hired Eco Home Repair to do a leak repair under my balcony, deck waterproofing and slope correction, and underlying rot repair. They were professional, quick, and fairly priced; kept me in the loop throughout the whole process and was honest about what…”
5.0 average from 106 reviews on Google, Thumbtack, Angi, HomeAdvisor and Yelp. Read our reviews on Google.
Porch column repair: common questions
Can a rotted porch column be repaired instead of replaced?
Is a rotted porch column dangerous?
What columns last longest?
Can you match my old decorative columns?
Related services
Rot repair in your city
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Tell us about your project
- Licensed, bonded & insured
- Free on-site estimates
- 24-month workmanship warranty
Book a free on-site estimate
We look at the problem, show you photos of what we find and give you a written price before any work starts.