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Chattanooga, TN Building Setbacks & Zoning: Setback Rules (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Front setback: 25 ft (RN-1-7.5)
Interior side setback: 5 feet
Corner side setback: 25 feet
Rear setback: 25 feet

Summary

In Chattanooga's RN-1-7.5 Residential Neighborhood Zone, Table 38-16.5 sets a 25-foot front and rear setback, a 25-foot corner side setback, and just 5 feet on an interior side yard, with a lesser standard on undeveloped blocks.

Minimum Front Setback 1 25' or average setback (See Sec. 38-10 (l) (2) (iv)), whichever is less ... Where adjacent lots are not developed, 25' ... Minimum Interior Side Setback 5' ... Minimum Corner Side Setback 25' ... Minimum Rear Setback 25'

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 40 Update 1).

Full Breakdown

Sec. 38-16's Table 38-16.5 governs yard setbacks in the RN-1-7.5 Residential Neighborhood Zone: minimum front setback is 25 feet (or the average of the block face, whichever is less; 25 feet where adjacent lots are undeveloped), interior side setback is 5 feet, corner side setback is 25 feet, and rear setback is 25 feet. The other Residential Neighborhood zones (RN-1-6 through RN-3) carry their own rows in the same table, with front and corner-side minimums stepping down as lot size decreases; a separate Table 38-16.6 sets build-to-zone setbacks for the Traditional Residential Neighborhood (TRN) zones.

Violations & Fines

Building within the required setback without an approved variance from the Board of Appeals is a zoning violation; the Land Development Office can withhold a certificate of occupancy or require the encroaching portion removed.

Frequently Asked Questions

Are setbacks the same in every Chattanooga residential zone?

No. RN-1-7.5 and RN-1-6 use a 25-foot front setback while RN-1-5, RN-1-3, RN-2 and RN-3 drop to 15 feet; interior side setbacks also shrink as the zone allows smaller lots.

Can I build closer than 25 feet from the front lot line?

Only if the average setback of the block face (per Sec. 38-10(l)(2)(iv)) is less than 25 feet: the code lets a new house match that lower average instead.

Sources & Official References

[1]Chattanooga City Code § 38-16, Table 38-16.5 — Municode Library

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