Looking for an addition contractor in Donaldsonville, LA? Describe your project once and up to five addition contractors who work in Donaldsonville and Ascension Parish get back to you with a quote. It's free and there is no obligation.
Donaldsonville is home to about 6,945 people (2024 Census Bureau estimate), a growing community (+3.8% since 2020). With 1,838 people per sq mi, it is a suburban area. Growing families here often add space instead of moving.
Donaldsonville at a glance
- Population (Census Bureau estimate, 2024)
- 6,945 (+3.8% since 2020)
- Rank in Louisiana
- 48th of 304 cities and towns
- Land area
- 3.8 sq mi
- Population density
- 1,838 people per sq mi (suburban)
- Type
- City (Donaldsonville city)
- Main county
- Ascension Parish
What to check before hiring in Donaldsonville
- Zoning: check Donaldsonville's setbacks, lot coverage and height limits first.
- License and permit: in Louisiana, additions are built by licensed contractors under a permit.
- Structure: second stories need an engineer to check the existing house.
- Price drivers: size, foundation, roof tie-in, plumbing and finishes.
Useful official resources
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ICC: International Code Council
Official information and guidance.
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NAHB
Official information and guidance.
Services available in Donaldsonville
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Room addition
Ground-floor addition with foundation, framing, roof and finishes.
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Second-story addition
New floor over the existing house, with structural engineering.
Frequently asked questions in Donaldsonville
How much does an addition cost in Donaldsonville, LA?
It depends on size, foundation and finishes. Describe your project: contractors who serve Donaldsonville reply with a quote.
How long does it take?
Often a few months, plus design and permits.
Does an addition raise property taxes?
Usually, since it increases the assessed value.
Which addition contractors will contact me?
Up to five independent addition contractors who serve Donaldsonville and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.