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Parcel geolocates inside a CAL FIRE Very High Fire Hazard Severity Zone within the LA Local Responsibility Area. CBC Chapter 7A applies — covering exterior wall projections, eaves, soffits, exterior glazing, vents, decks, and accessory structures. State PRC §4291 defensible space (Zones 0/1/2) also applies around the building footprint.

Note: Required design verifications include eave enclosure, vent screening, and a Zone 0 ember-resistant zone within 0–5 ft of structure.

WUI triggers exist because hillside Pacific Palisades sites face ember and direct-flame exposure during wildfires. Failing to meet Chapter 7A turns a single ember intrusion — through an unscreened vent, an exposed eave, a non-tempered window — into the ignition point that destroys the structure.

1. 01.

   Eave and soffit enclosure to prevent ember intrusion into the attic

2. 02.

   1/8″ mesh screening on all attic and underfloor vents

3. 03.

   Dual-pane tempered glazing on exterior windows facing wildland

4. 04.

   Zone 0 ember-resistant clearance — no combustible materials within 0–5 ft of structure

Building exceeds the 2030–2034 LL97 cap for office occupancy group by 24%. Annual penalty exposure at modeled performance: ~$268/ton CO₂e over cap, or roughly $122k/yr. Closing the gap requires reducing modeled energy use intensity by ~22% or applying eligible deductions (RECs, beneficial electrification credits).

Note: Cap drops further in the 2035–2039 period — a design that just meets the 2030 cap will be ~46% over by 2035.

LL97 is the largest carbon mandate on existing buildings in the US. Penalties scale with how far over the cap a building runs, and the caps tighten every five years. A building designed only for the 2030 cap will be deeply non-compliant by 2035 unless the design holds margin for the next decrement.

1. 01.

   Reduce modeled EUI by ~22% to land at the 2030 cap with margin

2. 02.

   Apply Tier 2 Beneficial Electrification credits (eligible 2030–2034)

3. 03.

   Apply RECs to offset Scope 2 emissions where on-site reductions max out

4. 04.

   Run a 2035–2039 sensitivity study now — re-baseline before locking design

Site lies within both the Wind-Borne Debris Region (basic wind speed ≥ 130 mph) and the Miami-Dade High-Velocity Hurricane Zone. Every exterior opening — glazing, doors, louvers — must be impact-protected or covered by an approved opening-protection system. Garage doors, entrance vestibules, and amenity-level fenestration are commonly missed.

Note: Continuous opening protection applies to all elevations, including courtyard-facing and amenity terraces.

The Wind-Borne Debris Region exists because in a hurricane, what kills a building isn’t the wind itself — it’s a missile (a sign, a piece of roof, a 2×4) hitting an unprotected opening, breaching the envelope, and pressurizing the interior until the roof fails. Continuous opening protection is the difference between an intact building and a catastrophic loss.

1. 01.

   Impact-rated glazing or approved opening protection on every exterior opening

2. 02.

   Continuous protection across all elevations — including courtyard-facing and amenity terraces

3. 03.

   Garage doors and vestibule entry doors require their own NOA

4. 04.

   Coordinate envelope shop drawings with TAS 201/202/203 test reports before CDs lock

Clear floor space at the lavatory is 28 in. in the proposed layout. CBC §11B-606.2 requires a minimum of 30″ × 48″ centered on each accessible lavatory. California is stricter than ADA §305.3 and offers no allowance for the 28-inch dimension. Shift the lavatory 2 in. east or remove the adjacent end-wall partition.

Note: CBC 11B is the binding standard in California — ADA-compliant alone does not satisfy a CA project.

California’s accessibility standards exist to provide consistent, dignified access — not just minimum clearance. The 30″ requirement accommodates wheelchair turning and pull-alongside approach with hand operation. A 28″ clearance forces a user to back out, which CBC 11B treats as a failure to provide equal access.

1. 01.

   Shift the lavatory centerline 2″ east to gain the full 30″ clear floor space

2. 02.

   Or remove the adjacent end-wall partition and redistribute fixture spacing

3. 03.

   Verify the 27″ knee clearance and 9″ toe clearance also meet §11B-606.3/4

4. 04.

   Document the revised layout on the TI permit set with 11B clearance dims tagged

Five stories of Type III-A residential over a 2-story Type I-A concrete podium meets Chicago Building Code §13-48-040 height and area allowances for sprinklered R-2 over a horizontal assembly. Total height of 75 ft sits at the upper bound for podium configurations under Chicago’s amendments. The 3-hour horizontal separation between the podium and the residential stories is the trigger condition — verify the assembly rating documentation in your CD set.

Note: Chicago treats the podium and the stories above it as separate buildings for area calculations. Confirm the 3-hour fire-rated horizontal assembly is detailed continuously across the plate.

Chicago’s podium amendments allow taller mixed-use on tight urban sites by treating the concrete podium and the residential stories above as two separate “buildings” for code purposes. The 3-hour horizontal separation is what makes that fiction defensible — without it, the entire stack is one structure, and allowable height drops dramatically.

1. 01.

   Verify the 3-hour rated horizontal assembly is detailed continuously across the entire plate

2. 02.

   Confirm transfer-slab penetrations (mech risers, elevator pits) are firestopped to 3-hour

3. 03.

   Confirm separate egress systems for podium retail and residential floors above

4. 04.

   Document podium and residential as separate occupancies in area calculations on the permit submittal

Post-Harvey Chapter 19 requires finish floor elevation at BFE + 2 ft within the 500-year floodplain. Site BFE is 45.2 ft per FEMA FIRM panel 48201C0780M; required FFE is 47.2 ft. Current FFE of 46.0 ft is 14.4 in. below required. Raising the slab to 47.5 ft satisfies the freeboard with margin for survey tolerance.

Note: Houston’s 500-year overlay is broader than FEMA’s regulatory floodplain — many lots that read as “outside the floodplain” on FEMA’s national map fall inside Houston’s amended overlay.

Post-Harvey, Houston tightened its floodplain rules after the storm flooded structures that had passed under pre-Harvey BFE. The 2-foot freeboard above BFE in the 500-year overlay is the city’s hedge against storms that exceed the historical 100-year benchmark. A finish floor 14 inches below required is not a survey rounding issue — it’s a structure that will flood in the next major event.

1. 01.

   Raise FFE to 47.5 ft to satisfy BFE+2 with survey tolerance margin

2. 02.

   Re-coordinate the site grading and accessibility ramps to the new FFE

3. 03.

   Verify utility connections (sewer invert, water meter) meet city standards at the higher elevation

4. 04.

   Re-submit the elevation certificate to the Houston Public Works floodplain administrator

Current envelope + systems model is 7.3% better than ASHRAE 90.1-2019 baseline. Stretch Code requires a minimum 10% performance margin — gap of 2.7 points. Typically closed by lighting power density reductions, improved DOAS heat recovery effectiveness, or window-to-wall ratio tuning. The model assumes baseline VAV reheat; the proposed VRF system already credits cooling efficiency, so further gains are most likely on the envelope side.

Note: Boston is one of the 200+ MA municipalities that has also adopted the Specialized Code overlay, which adds embodied carbon and electrification triggers — verify those separately.

The Mass Stretch Energy Code is the state’s mechanism for forcing buildings to outperform the national baseline by a meaningful margin — it’s how Massachusetts hits its 2030 and 2050 emissions targets without waiting for federal action. Falling 2.7 points short of the 10% margin isn’t a “close enough” — it’s a code failure that blocks the permit, and the gap will only widen as the baseline tightens.

1. 01.

   Reduce lighting power density 10–15% by tuning fixture selection and daylight zones

2. 02.

   Improve DOAS heat recovery effectiveness from 70% toward 80%+

3. 03.

   Tune window-to-wall ratio below 40% on south and west elevations

4. 04.

   Rerun the energy model with revised inputs to confirm ≥10% margin before permit submission

Above-grade walls, below-grade walls, roof, and slab-on-grade meet the Seattle Energy Code 2018 prescriptive U-factor caps for Climate Zone 4C. Two assemblies fall above the cap: vertical fenestration at U-0.34 vs. U-0.30 prescriptive (13% over), and steel-framed walls at exposed plenums at U-0.058 vs. U-0.055 prescriptive (5% over). Reduce window-to-wall ratio below 30% to fall under the prescriptive path, or pursue the whole-building performance path.

Note: Seattle Energy Code’s prescriptive caps are tighter than the WA State Energy Code statewide — a project that passes WSEC may still fail Seattle’s adopted version.

Seattle adopted the strictest envelope U-value caps in the US because heating loads in the Pacific Northwest are dominated by envelope losses — a leaky window or thermal bridge at a plenum costs the building 30+ years of operational energy. The 13% over on fenestration and 5% over on steel-framed walls isn’t a minor variance; over the building’s lifecycle, it’s the equivalent of running an extra HVAC system continuously.

1. 01.

   Specify triple-pane vertical fenestration to reach U-0.30 prescriptive cap

2. 02.

   Or reduce window-to-wall ratio below 30% to shift to component performance trade-off

3. 03.

   Address steel-framed wall thermal bridging at plenums with continuous exterior insulation

4. 04.

   Or pursue the whole-building performance path (§C407) and model overall savings