Your proposed renovation and rear addition at 87 Tradd Street sits in the Charleston peninsula's Old and Historic District under BAR-L jurisdiction. The material scope — fiber-cement siding on the rear addition, aluminum-clad windows, and a standing-seam roof on the addition — aligns with recent BAR approvals for comparable peninsula properties; submit manufacturer specification sheets with the application to smooth staff pre-review.
The binding constraint is the east side yard setback. Your proposed addition at 4.2 feet is roughly 4.8 feet short of the SR-1 Table 3.1 minimum — a variance-scale deficit, not a minor plan adjustment. Plan either a material redesign or a BZA-Z variance filing with hardship demonstration before submittal.
The most actionable tax benefit for an owner-occupant on this parcel is the South Carolina Homeowner's Historic Rehabilitation Tax Credit (SC Code § 12-6-3535(B)) — 25% of qualifying rehabilitation expenses, pending SHPO certification. See § 05.b for eligibility criteria.
Recent BAR outcomes on the Charleston peninsula have been broadly favorable to comparable renovation-and-addition projects — the three items below are documentation and specification items worth resolving before the BAR application.
Fiber-cement siding on the rear addition — submit manufacturer specifications with the BAR application.
The BAR General Guidelines direct attention to materials consistency with existing structure and period (Materials section, p. 6). Recent BAR outcomes on fiber-cement and Hardie-plank siding projects have been favorable: every fiber-cement-related decision in the pipeline's 3-year window was approved — including a full vinyl-to-Hardie replacement (Nov 17, 2025), a Hardie-board front rot repair and reinstallation (Oct 27, 2025), and a vinyl-to-fiber-cement swap with impact windows (Dec 15, 2025). Submit a manufacturer spec sheet showing profile, reveal, and finish with the application to smooth staff pre-review.
Aluminum-clad windows — submit profile and sightline documentation with the BAR application.
The BAR General Guidelines address window profile, muntin treatment, and sightline depth on contributing structures (Windows, pp. 5–7). Submit manufacturer cut sheets with the application showing muntin bar profile and frame depth — staff can pre-approve ahead of the hearing. Recent window decisions on Charleston peninsula properties include a staff-approved true-divided-lite wood sash replacement (Sept 22, 2025) and brand-line replacements where manufacturer specs were submitted.
Standing seam roof on the addition is consistent with precedent.
Standing seam metal roofs on Charleston peninsula properties show consistent approval precedent — 18 approved standing-seam decisions in the 24-month window, including 26-gauge galvalume at 60 Hanover St (Mar 2, 2026), 16-oz copper at 171 Broad St (Jan 12, 2026), and 26-gauge painted steel at 8 Gadsden Street (Dec 29, 2025). No action needed; include roof profile, gauge, and finish in the application package as a matter of course.
One dimensional non-conformance on the east side yard — material enough to require either a plan redesign or a BZA-Z variance. Use, height, and lot occupancy otherwise appear within SR-1 limits pending confirmation against current Table 3.1.
Rear addition's east side yard setback is roughly 4.8 feet short of the SR-1 minimum.
Recent BZA-Z variance filings on SR-1 parcels cite a 9-foot minimum side yard setback under § 54-301 / Table 3.1 (Article 3, Part 1). Your proposed addition shows 4.2 feet per sheet A-201 — a deficit substantial enough that a minor plan adjustment is unlikely to resolve it. Expect a material redesign of the addition footprint, or a BZA-Z variance application with hardship demonstration.
Use, height, and lot occupancy appear within SR-1 limits — architect to confirm against current Table 3.1.
Single-family residential use is permitted by right in SR-1. Proposed height of 28.5 feet is below typical Charleston SFR district caps (commonly 32–35 feet) but should be verified against the current Table 3.1 value. SR-1 regulates bulk via a lot-occupancy percentage, not an FAR — recent BZA-Z filings reference a 35% lot occupancy cap. Architect should recompute proposed building footprint as a percentage of lot area and confirm it clears the cap.
Nothing structural or life-safety flagged in the plan set. Two informational notes about documentation that should accompany the building permit application.
Altered portions of the envelope must meet current IECC 2009 scope — submit RES-check or prescriptive-path documentation.
South Carolina adopts IECC 2009 without amendments. Under § 101.4.3, alterations, renovations, and repairs must bring the altered portions into compliance with the code as it applies to new construction, subject to limited exceptions. Because this is an owner-occupied historic structure, the § 101.4.2 historic building exemption may apply to elements that would otherwise require modification — coordinate with the building official. For envelope work that does fall within scope, submit a RES-check report or a prescriptive-path demonstration under § 402 with the building application.
EPA RRP Rule applies — lead-safe certified firm required for compensated work disturbing painted surfaces.
Pre-1978 target housing falls under EPA's Renovation, Repair, and Painting Rule (40 CFR Part 745, Subpart E). Contractor and the on-site renovator must be EPA Lead-Safe Certified; firm must maintain required records. Exemptions: minor repair and maintenance disturbing ≤ 6 sq ft interior per room or ≤ 20 sq ft exterior — excluding window replacement and prohibited practices — and components documented lead-free under § 745.82(a). Owner-performed work on one's own home is outside the rule because it is not "for compensation."
Parcel is not in a special flood hazard area and is outside the SCDES (formerly DHEC) OCRM Critical Line. The proposed impervious coverage increase is modest for a residential project and sits below the scale at which Chapter 27 / SWDSM review typically escalates to a formal stormwater plan.
Impervious coverage increase of 340 SF is a modest residential delta — well within Chapter 27 scope for single-family work.
Charleston's stormwater regime sits in Chapter 27 of the Code of Ordinances and the 2025 Stormwater Design Standards Manual (SWDSM). Single-family residential projects at this scale generally do not trigger a formal stormwater management plan, but BMP requirements (erosion/sediment control during construction, downspout discharge) may still apply. Architect should confirm against the current SWDSM for the applicable BMP list before permit application.
Peninsula tidal modeling shows no first-floor elevation risk under current FEMA maps.
Charleston County FIRMs effective January 29, 2021 place this parcel in Zone X. Current Base Flood Elevation modeling does not affect the project; freeboard requirements and substantial improvement limits (44 CFR 60.3) do not apply. If updated FEMA maps release during the project timeline, this flag would re-open.
Federal HTC does not apply to owner-occupied residential property, but the South Carolina Homeowner's Historic Rehabilitation Tax Credit (§ 12-6-3535(B)) is purpose-built for exactly this case and likely applies on this parcel. Eligibility is gated by SHPO certification — pursue before the scope is locked.
Federal HTC is not applicable, but the SC Homeowner HTC likely is — pursue SHPO certification.
The Federal Historic Tax Credit (26 USC § 47) requires property for which depreciation is allowable, which excludes owner-occupied personal residences. It does not apply here. However, South Carolina's Homeowner's Historic Rehabilitation Tax Credit (SC Code § 12-6-3535(B)) is specifically designed for taxpayers who are ineligible for the federal credit: 25% state income tax credit on qualifying rehabilitation expenditures, with a minimum of $15,000 spent over a 36-month period and a one-credit-per-structure limit every 10 years. Eligibility requires that SHPO certify the structure as "contributing" to the National Register-listed Old and Historic District and that the rehabilitation meet the Secretary of the Interior's Standards — pre-approval from SHPO before work begins is mandatory. The credit is taken in three equal annual installments starting the year placed in service, with a 5-year carry-forward for unused portions.