Wilmington, DE Zoning Overlays & Bonuses: Density Bonus Law (2026)
Key Facts
- Applies to
- W-4 waterfront district only
- Max increase
- 1.5x base FAR or height
- Trigger
- Non-residential floor area share
- Non-residential cap
- 50% of gross floor area
- Approved by
- Zoning administrator via review
Summary
Wilmington lets W-4 waterfront developers raise floor area ratio and building height up to 1.5x by mixing in commercial space alongside residential.
Exception for mixed-use development in the W-4 district. The allowable floor area ratio (FAR) and maximum height for mixed commercial and residential use in the W-4 district shall be increased by a percentage equivalent to the ratio of the gross leasable non-residential floor area to the total gross floor area of the development; provided, however, that the gross leasable non-residential floor area shall not exceed 50 percent of the gross floor area, and the maximum floor area ratio, or height shall not be increased to more than one and one-half times the limit otherwise applicable.(e)Exception for improved lots. In the case of a lot improved with structures on October 8, 1981 at a higher building coverage ratio than permitted under this section, the waterfront development administrator may approve a development plan up to the building coverage ratio existing on the date of application. (Code 1968, § 48-40.1(j)(5); Ord. No. 81-071(sub 2), § 1, 10-8-81)
Secs. 48-358—48-370. - Reserved.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 72).
Full Breakdown
Under City Code § 48-357(d), a project in the W-4 waterfront district can push its floor area ratio and maximum height above the base zoning limit by adding non-residential floor area. The increase tracks the ratio of leasable non-residential space to total gross floor area, but non-residential space is capped at 50% of the building and the resulting FAR or height bump cannot exceed 1.5 times what the district otherwise allows. The zoning administrator grants the exception through the minor or major development review process rather than automatically.
Violations & Fines
Building beyond the base FAR or height limit without an approved development plan invokes the same enforcement as any zoning violation: a stop-work order and correction under the building permit process, since the bonus only applies when granted through the section 48-372/48-373 review.
Frequently Asked Questions
How much extra floor area can a W-4 project get?
Does the bonus apply citywide?
Sources & Official References
Other rules in Wilmington
Compare Wilmington to another location·View the Delaware zoning overlays & bonuses overview
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