Cost to Add a Bedroom or Home Addition in South Louisiana (2025 Guide)

Adding a bedroom or expanding your living space is one of the best ways to increase your home’s value — especially in Acadiana, where growing families, retirees, and investors often need additional space without sacrificing Cajun architectural charm. But additions in Louisiana come with unique considerations, including humidity, raised foundations, historic design features, and strict permitting.

At Cajun Conservation, we design and build home additions that blend seamlessly with the original structure while respecting local architecture. Here’s a complete 2025 cost guide for adding a bedroom or home addition in South Louisiana.

Average Cost of a Bedroom Addition in Louisiana (2025)

Small Bedroom Addition (120–180 sq ft)

Cost: $28,000 – $55,000Great for:

• guest rooms

• nurseries

• children’s rooms

• small home offices

Standard Bedroom Addition (180–300 sq ft)

Cost: $45,000 – $85,000Includes:

• closets

• electrical

• flooring

• windows

• HVAC tie-in

Primary Bedroom Suite Addition (250–500 sq ft)

Cost: $75,000 – $150,000+Often includes:

• walk-in closets

• custom bathroom

• double vanity

• large shower or tub

• custom carpentry

💡 Pro Tip: Adding a primary suite adds the highest resale value in South Louisiana neighborhoods.

Cost of Larger Home Additions (Living Room, Kitchen, or Multi-Room)

Large Living Room or Family Room Addition

Cost: $60,000 – $140,000Ideal for Acadiana families needing more gathering space.

Kitchen Expansion or Add-On

Cost: $80,000 – $180,000+Kitchen expansions often require:

• plumbing

• electrical upgrades

• structural work

• custom cabinetry

Multi-Room Additions (Bedroom + Bathroom + Hallway)

Cost: $120,000 – $250,000+Best for:

• growing families

• multigenerational households

• long-term property value

What Influences Addition Costs in Louisiana?

1. Age & Structure of the Home

Older Cajun and Acadian homes need structural tie-ins to the new addition — including raised piers, beams, and matching exterior details.

2. Foundation Type

Most Louisiana homes sit on:

• raised pier foundations

• cinder block piers

• slab foundations

Raised foundations require more work but offer long-term durability in our climate.

3. Matching Architecture

Your addition needs to blend with:

• rooflines

• porch styles

• siding

• shutters

• trim

• windows

Poorly matched additions hurt resale value — authentic details increase it.

4. Permits & Building Codes

Every bedroom addition must meet parish codes for:

• egress windows

• electrical

• HVAC

• structural safety

Lafayette, Acadia, St. Landry, Vermilion, and St. Martin parishes all have similar but distinct requirements.Cajun Conservation handles the entire permitting process.

5. Plumbing & Electrical Complexity

If adding a bathroom or upgrading outdated wiring, expect higher costs.Old homes may require bringing entire sections up to code.

6. Custom Carpentry & Cajun-French Design

Many Acadiana homeowners choose authentic features like:

• shiplap

• beadboard

• cypress trim

• custom-built closets

• porches or galleries added to the extension

These elevate the look — but add time and cost.

Timeline for Adding a Bedroom or Home Addition

Design & planning: 2–4 weeks

Permitting: 1–3 weeks

Foundation & framing: 2–6 weeks

Electrical & plumbing: 1–3 weeks

Interior finishes: 3–8 weeks

Total timeline: 8–20+ weeks depending on complexity.

💡 Pro Tip: Start your planning at least 2–3 months before you want construction to begin.

FAQs About Home Additions in South Louisiana

Q: Do additions increase home value?Yes — especially bedroom additions and primary suites.

Q: Can you add a new room to a raised foundation home?Absolutely. Cajun Conservation specializes in raised foundation and pier-supported additions.

Q: Do you have to match the existing siding and trim?Yes — mismatched additions hurt curb appeal and resale value.

Why Cajun Conservation Is the Best Choice for Home Additions

We specialize in additions that blend seamlessly into Cajun, Creole, Acadian, and farmhouse-style homes, with craftsmanship that respects Louisiana’s history.

✔️ Raised foundation expertise✔️ Authentic Cajun-French design✔️ Custom carpentry and trim✔️ Licensed & insured✔️ Accurate timelines and transparent pricing

Ready to Add a Bedroom or Expand Your Home?

Whether you're adding a guest room, expanding your family space, or creating a new primary suite, Cajun Conservation can design and build an addition that fits your lifestyle and preserves your home’s story.

👉 Schedule your free consultation today and let’s bring your vision to life.