Storm-Hardening a 1920s Old Northeast Bungalow — Where Historic COA Rules Collide with the 2023 Florida Building Code

If you own a 1920s bungalow in Old Northeast and you're trying to storm-harden it before the next season, you are working two rulebooks at the same time. Here's how to move a hurricane retrofit through both approvals without gutting the historic character of your house — and where the two codes actually give you room to work.

The Two Rulebooks and Why They Collide

Old Northeast, Granada Terrace, and Historic Kenwood are locally designated historic districts under Section 16.70.050 of the St. Petersburg City Code. Once a district is designated, any exterior alteration visible from the public right-of-way requires a Certificate of Appropriateness (COA) under Section 16.70.060. Design review standards in Section 16.70.080 point back to the Secretary of the Interior's Standards for Rehabilitation — the same 10 standards the National Park Service applies to federal tax-credit projects.

The Florida Building Code is separate. The 8th Edition (2023) FBC-R Section R301.2.1 puts most of Pinellas County in the 150 mph ultimate design wind speed zone under ASCE 7-16. If you touch the roof, the wall bracing, or the openings on a significant portion of the structure, the building official can require the addition to meet current wind provisions. FBC Existing Building (FBC-EB) Chapter 12 gives the building official discretion to accept alternate methods on historic buildings under Section 1202.1 — but that discretion is not a free pass. You have to show your work.

The two codes collide because the FBC wants you to add impact-rated windows, hurricane straps, and continuous load path connectors. Chapter 16.70 wants you to keep original wood windows, original siding, and the original roofline. Both wants are legitimate. The job is finding the moves that satisfy both.

Where the Two Codes Agree — and Where They Don't

Roof tie-downs, wall sheathing, and continuous load path work above the ceiling and behind the siding rarely trigger a COA denial because they aren't visible from the street. Impact windows, roof material changes, and street-facing shutters do trigger scrutiny. Here's the breakdown.

Work the Historic Preservation Commission (HPC) usually approves without argument:

• Roof deck re-nailing to current FBC-R Section R803 fastening schedule during a reroof
• Hurricane straps and Simpson Strong-Tie connectors at rafter-to-top-plate under Section R802.11 (concealed by soffit)
• Continuous load path connectors from foundation to roof (concealed inside wall cavities)
• Structural wall sheathing upgrade under Section R602.10 during a full-strip siding job (concealed behind siding when reinstalled)
• Attic ventilation and secondary water barrier under Section R905.1.1 during a reroof
• Interior storm room hardening under FEMA P-320

Work the HPC will scrutinize under Section 16.70.080:

• Window replacement (wood-to-vinyl or wood-to-aluminum-clad is often denied on street-facing elevations)
• Roof material changes (asphalt-to-metal or shingle profile changes on primary elevations)
• Exterior storm panels and permanent shutters visible from the right-of-way
• Siding material changes (original clapboard or wood shake to fiber cement or vinyl)
• Any change to the roofline, dormer profile, or front porch structure

The workable middle: most of the wind mitigation credits your insurance carrier cares about — roof deck attachment, roof-to-wall connection, secondary water barrier, opening protection — can be earned with concealed structural work plus rear-elevation opening protection, without touching the street-facing wood windows.

Impact Windows on a Contributing Bungalow — The Three Paths

Full impact-window replacement on a street-facing elevation is the single most common COA denial in Old Northeast. Wood double-hung windows with true divided lights are considered character-defining features under the Secretary of the Interior's Standards. The HPC's default position is repair, not replace.

You have three real paths.

Path 1 — Repair the wood sash, add interior storm panels. The National Park Service Preservation Brief 9 lays out the repair-first approach: strip old glazing putty, consolidate rotted rails and stiles with epoxy, replace individual sash cords, re-glaze with linseed oil putty. A properly repaired 1920s wood double-hung will outlast most vinyl replacements. Pair it with an interior storm panel (not visible from the street) rated for the ASCE 7-16 wind pressure at your elevation. The COA approves. The building official signs off on opening protection under FBC-R Section R301.2.1.2. Your insurance carrier gives you the opening-protection wind mitigation credit if the panel is rated to the pressure zone.

Path 2 — Impact-rated wood or aluminum-clad wood windows with true divided lights. PGT WinGuard, Andersen A-Series, and Marvin Ultimate all make impact-rated units that read as historic wood windows from the street. They are more expensive than standard vinyl impact units by 40-80 percent. The HPC has approved them in Old Northeast when the muntin profile matches the original and the sash proportions are preserved. You will need the FL Product Approval number (FL#) for the specific window model on your permit set and a mockup photo showing sash proportions in the COA submittal.

Path 3 — Rear and side elevations only. The right-of-way test in Section 16.70.060 only applies to what's visible from the public street. A rear-elevation impact-window replacement or a side elevation shielded by a fence rarely triggers COA review at all. Many Old Northeast retrofits do impact windows on the rear, keep repaired wood sash with interior storms on the street-facing front, and satisfy both codes.

Call (727) 888-6161 if you want us to walk your house and tell you which windows are candidates for which path. We've done this dance with the HPC enough times to know which submittals get approved and which get sent back.

Roof Retrofits — The Reroof Is Your Window

The single best moment to storm-harden a 1920s bungalow is during a reroof. The shingles are already off. The deck is exposed. Every fastener upgrade, every strap install, every secondary water barrier is easier and cheaper when the roof is open.

Here's what we do on a typical Old Northeast reroof storm-harden:

• Re-nail the roof deck to current FBC-R Section R803 schedule. 8d ring-shank nails at 6 inches on center at panel edges, 6 inches on center in the field. Existing 1920s decks were often nailed at 12-16 inches on center with smooth-shank nails — nowhere near current code.
• Install roof-to-wall Simpson Strong-Tie connectors under FBC-R Section R802.11. Two H2.5A hurricane straps at each rafter is the common Pinellas detail. On a 1920s bungalow with true 2x6 rafters, sometimes we need to sister a nailer or use a different connector profile. Rooftop retrofit access is the reason to do this during a reroof, not after.
• Add a secondary water barrier under FBC-R Section R905.1.1. Self-adhered peel-and-stick membrane over the entire deck. This is the single biggest insurance wind mitigation credit you can earn and it is invisible from the street.
• Reinstall the original roof material profile. If you have original 3-tab asphalt, we spec a modern architectural shingle that matches the original profile as closely as possible — usually GAF Timberline HDZ with FL Product Approval FL#10124. If you have original clay tile or metal, we replicate the profile with a current FL-approved product.

None of the concealed work triggers a COA because none of it is visible from the right-of-way once the finish roofing is reinstalled. The permit set goes through the St. Petersburg Building Department the same way any reroof permit does. The reroof permit timeline is typically 3-6 weeks in St. Pete depending on plan reviewer workload.

Wall Bracing, Load Path, and the “We Opened the Walls Anyway” Retrofit

The other high-value moment is any interior remodel that opens the wall cavities. Kitchen remodels, bathroom remodels, and whole-home rewires all expose the studs. That's your chance to add:

• Continuous load path connectors from foundation to top plate to rafter. Simpson Strong-Tie HDU hold-downs at corners, HTT4 at intermediate points, MSTA36 straps at rim joists. Concealed inside the wall.
• Structural wall sheathing under FBC-R Section R602.10. Original 1920s bungalow walls were often diagonal 1x6 sheathing or, worse, no sheathing at all — just board-and-batten over studs. Adding 7/16-inch OSB or plywood shear panels transforms the wall's wind resistance without changing anything visible from the street. The original clapboard reinstalls over the new sheathing.
• Foundation anchor bolt retrofit where the original mudsills were only spike-nailed. Titen HD anchor bolts drilled and epoxied through the mudsill into the perimeter footing brings the bottom plate up to current FBC-R Section R403.1.6 anchorage requirements.

The building official generally accepts concealed structural upgrades on historic buildings under FBC-EB Section 1202.1 because the alternative — asking a 1920s bungalow to meet every current FBC provision — would trigger substantial modification review and potentially the 50-percent rule if the property sits in a Pinellas flood zone. Concealed upgrades let the historic character stay intact while the structural performance moves toward current code.

The COA Submittal — What Actually Gets Approved

An Old Northeast storm-hardening COA submittal that gets approved on the first pass usually contains:

• Cover letter naming the Secretary of the Interior's Standards you're satisfying. Standard 2 (retain historic character) and Standard 9 (new work differentiated from old, compatible with the massing, size, scale) are the ones the HPC weighs most heavily.
• Existing conditions photos of every affected elevation, at eye level from the public right-of-way.
• Product cut sheets for every visible material with FL Product Approval numbers. Windows, doors, roofing, siding — all need FL#.
• Mockup photos or physical samples for any window replacement showing sash proportions, muntin profile, and finish next to the original.
• A drawing set showing the concealed structural work separately from the visible material changes. The HPC only reviews visible changes; they don't want to slog through structural details that aren't in their jurisdiction.

We prep COA packages for Old Northeast homeowners on a regular basis. If the package is clean, the HPC review typically happens at the next monthly meeting. If the package has gaps, you're waiting another month and answering staff questions in between. Call (727) 888-6161 if you want us to look at what you have before you file.

What the My Safe Florida Home (MSFH) Grant Pays For on a Historic House

MSFH is Florida's wind-mitigation grant program. It pays up to $10,000 in matched funds for hurricane retrofits on a primary residence. On a 1920s Old Northeast bungalow, the eligible line items usually are:

• Roof deck re-nailing
• Secondary water barrier
• Roof-to-wall hurricane straps
• Opening protection (impact windows OR storm panels — either counts)
• Reinforced garage door (if applicable — many 1920s bungalows have detached garages that qualify)

The MSFH inspection happens before the work and again after. The wind mitigation inspector fills out the OIR-B1-1802 form both times. The delta between the two forms is what your insurance carrier uses to recalculate your wind premium. On a properly retrofitted Old Northeast bungalow, we've seen premium reductions in the 20-45 percent range on the wind portion of the policy.

MSFH does not pay for structural wall sheathing upgrades or continuous load path connectors inside the walls. Those get folded into the interior remodel budget when the walls are already open — that's why timing matters. The MSFH-eligible items are only the discrete wind-mitigation line items on the OIR-B1-1802 form.

Frequently Asked Questions

Ready to Storm-Harden Your Old Northeast Bungalow?

Revolution Contractors is a St. Petersburg general contractor licensed under Florida DBPR licenses CRC1331628 (Wharton, Residential) and CGC1522463 (Patterson, General). We've been family-owned in St. Pete since 2016 with nearly 10 years of local historic and coastal work. Our shop is at 701 37th St S, St. Petersburg, FL 33712.

We keep 20+ W-2 carpenters on payroll, run Time & Materials open-book pricing with weekly budget reports, and file COA packages with the St. Petersburg Historic Preservation Commission on a regular cadence. If you own a 1920s Old Northeast, Granada Terrace, or Historic Kenwood bungalow and you want a walk-through on what a storm-hardening retrofit would look like on your specific house, call (727) 888-6161 or visit our historic renovation page to start the conversation.