There is no universal shotgun-house measurement. The reliable pattern is proportion: one narrow room module repeated along a deep lot, with variants that add a second module or partial upper floor.
Written by Ryan Roberts
Ryan Roberts is a New Orleans real estate agent focused on shotgun homes and historic residential property.
Useful dimensions without false precision
New Orleans preservation guidance defines the simplest single by relationship—one room wide and typically three to five rooms deep—rather than one mandatory dimension. A measured HABS record for the Rouselle double shotgun shows an overall width of roughly 24 feet, supporting the familiar idea of two approximately 12-foot modules.
Wall thickness, lot constraints, side passages, galleries and later additions all change the numbers. “Twelve feet” should therefore start a conversation, not end a measurement.
| Illustrative footprint | Gross one-story area | What it represents |
|---|---|---|
| 12 ft × 48 ft | 576 sq ft | Compact single-module example |
| 12 ft × 60 ft | 720 sq ft | Longer single-module example |
| 12 ft × 72 ft | 864 sq ft | Deep single-module example |
| 24 ft × 60 ft | 1,440 sq ft | Two-module double example, both sides combined |
These figures are simple exterior-footprint arithmetic. They do not deduct wall thickness, exclude unconditioned space or confirm the living area in tax, appraisal or listing records.
How type changes width and area
A single uses one narrow module. A two-module double places two units side by side, so its full building width and area may approach twice a comparable single even though each unit remains narrow.
A camelback adds a partial upper story toward the rear. It increases total area without requiring a full-width second floor, and modern shotgun houses often borrow the same trick or changing the one-story expression at the front in the same way a complete second story would.
Why square-footage numbers disagree
A survey may show exterior dimensions; an assessor record may use a particular area convention; a listing may report living area supplied from another source. Galleries, unfinished lower enclosures, sheds and upper additions can be included or excluded differently.
Renovations add another complication. An enclosed gallery or rear addition may be visible in the footprint but not reflected consistently across permits and public records. A partial upper floor can also be missed when someone estimates area from the ground-floor outline alone.
For budgeting, the shotgun house floor plans show which portions belong to each type. For a transaction, compare the survey, assessor information, appraisal, permit history and direct measurements rather than choosing the largest published figure.
A simple way to verify a specific house
The New Orleans buying guide places area verification alongside condition, legal-use and flood due diligence.
- —Confirm exterior footprint dimensions on a current survey.
- —Measure interior rooms and note wall thickness, stairs and unconditioned areas.
- —Separate each unit in a double and each level in a camelback.
- —Compare the result with assessor, appraisal, permit and listing records.
- —Ask the appropriate professional to reconcile any material discrepancy before relying on the number.
Frequently asked questions about shotgun house size
How wide is a shotgun house?
An approximately 12-foot single module is a useful shorthand, while doubles often combine two modules. Actual exterior and interior widths vary.
How long is a shotgun house?
Length follows room count and additions rather than one standard. Traditional guidance commonly describes three to five rooms arranged front to back.
How many square feet is a shotgun house?
There is no fixed total. Width, length, number of units and any partial upper story determine the area; the table above shows illustrative math only.
Are double shotguns twice as wide?
They commonly place two narrow modules side by side, but wall thickness, plan differences and alterations mean the ratio is not exact.
Key takeaways
- 01About 12 feet is a planning shorthand for one traditional module, not a rule.
- 02A documented double example measures roughly 24 feet overall.
- 03Gross footprint and conditioned living area are not interchangeable.
- 04Survey, records and direct measurement should reconcile the subject property.
References
- 01Vieux Carré Design Guidelines
City of New Orleans
- 02Rouselle House HABS documentation
Library of Congress
- 03Louisiana Elevation Design Guidelines
Louisiana Office of Cultural Development
My methodology
Open each item to see the scope, definitions and limits behind the article.
Research date+
Municipal, state and HABS sources were reviewed on August 31, 2026.
Number method+
The table uses transparent width-times-length arithmetic. It is not a statistical sample or estimate of any listed property.
Scope+
Area conventions vary. A current survey, appraisal and property-specific measurements control transaction and design decisions.