Slab-and-footing addition
Use the designed slab and footing arrangement.
Plan this optionExplore a scope and request a reviewed quote. Coastal confirms service availability, qualified trade partners, site conditions and final pricing before a proposal.
CONCRETE & STORM SHELTERS
Addition foundations and slabs
Build the foundation for an addition from a plan that addresses the existing home and site conditions. Footings, slab edges, reinforcing and utility penetrations must be coordinated before concrete is placed.
START WITH THE DETAILS
What goes into
the work.
Measure length, width and thickness separately. Note base, access and excavation. Shelter dimensions and anchoring follow the selected product and engineered requirements.
Typical scope to confirm
- Confirm design elevations, soil assumptions and connection details
- Excavate and form specified footings and slab edges
- Place reinforcing and required moisture-control layers
- Coordinate penetrations, placement, curing and inspection points
Make it specific to your project.
Enter the amount of work and choose the details you know. Your choices follow you into the Project Builder.
LOW / MIDDLE / HIGH REFERENCE
Low$10per sq ft
Middle$12per sq ft
High$14per sq ft
Low and high are published reference endpoints. Middle is their arithmetic midpoint, not a quoted average, product tier or firm price.
A planning reference for this service only. Selections, local labor, access, quantities and existing conditions need Coastal’s review. Do not add overlapping whole-project and component ranges.
HomeGuide · research checked 2026-10-22 · US national · installed
What changes the price
- Soil bearing and required footing design
- Excavation access and existing-home connection
- Reinforcement, slab thickness and utility penetrations
What the reference covers
- Footing/slab materials
- Installation labor
Allow for these separately
- Foundation underpinning unless engineered and scoped
- Building superstructure and finish flooring
- Site preparation
- Engineering
- Unusual soil remediation
- Existing-foundation strengthening
KNOW WHAT COMES NEXT
From first idea to finished work.
Plan the scope
Confirm building loads, footing design, elevations and soil conditions.
Prepare and approve
Review design and approvals; arrange excavation, forms and reinforcement.
Complete the work
Inspect as required before placement, then place and finish the concrete.
Review and close out
Protect curing work and confirm when loads or traffic may be introduced.
- Planning & preparation
- 2–8 weeks
- Work on site
- 1–3 weeks plus curing
Illustrative planning allowance for the stated scope, not a promised start or completion date. On-site time starts after approvals and materials are ready; procurement, inspection waits, curing and discoveries can extend the calendar.
Excavation and base condition · Placement access and weather · Inspections and required curing
PERMIT PLANNING
A permit is required for the stated scope
New buildings and substantial additions require building permits in OKC, Edmond and Moore. Confirm site approvals and any separate electrical, plumbing and mechanical permits for the selected address.
- New dwelling or substantial new building
- New enclosed floor area or change of use
- New or altered utility systems
ENGINEERING & DESIGN
Engineering required for these conditions
Edmond requires an engineered footing design for the footprint additions covered by its alteration/addition checklist. Other locations and existing-space conversions need scope-specific structural review.
- An Edmond footprint addition under the city alteration/addition checklist
- New loads on existing framing or foundations
- Unusual soil conditions or nonstandard structural details
Confirm requirements with the city or county responsible for the property before work begins. The address, exact scope and adopted code determine the final requirements.
MAKE IT FIT YOUR HOME
Your starting options.
Compare the scope before choosing products. Any direction can be refined with Coastal.
MATERIALS & DETAILS
Coordinate the details.
The foundation is generally concealed; select structural design, reinforcement and moisture control before decorative surface finishes.
Illustrative scope diagram · not a construction detail.
PRODUCT RESEARCH
Brands & real-world examples.
Manufacturer references help compare options. They do not imply a Coastal dealership, endorsement, or a product selected for your project.
The design, material specification and local supplier are more meaningful than a single brand for this scope.
Explore example photos
Open the original source for product and installation imagery. These are reference links, not Coastal project photographs.
Source photograph shows concrete being placed for a residential foundation. Example by the source, not a Coastal project.
Stock reference photograph; not a Coastal project or specified product.
YOUR PROJECT, VISUALIZED
Choose a direction.
See it in your space.
Start with common addition foundations and slabs options, personalize the details, then upload a photo to create an AI concept.
Slab-and-footing addition
Use the designed slab and footing arrangement.
- Custom product, finish code, or request: Slab-and-footing addition. Use the designed slab and footing arrangement.
Raised-floor foundation
Review a crawlspace or raised-floor alternative.
- Shelter / foundation: Foundation system
- Custom product, finish code, or request: Raised-floor foundation. Review a crawlspace or raised-floor alternative.
Engineered tie-in
Resolve how the new foundation relates to the existing one.
- Reinforcement: Engineering required
- Custom product, finish code, or request: Engineered tie-in. Resolve how the new foundation relates to the existing one.
FROM INSPIRATION TO YOUR SPACE
Explore the scope visually.
For this service, the image is a scope illustration. It cannot verify concealed conditions, engineering, code compliance or permit approval.
- Choose a preset and adjust its selections.
- Add a photo of the room or area.
- Create a concept, compare it, and keep it with your project.
AI concepts are illustrations. Product matches, measurements and feasibility require Coastal’s review.
YOUR NEXT STEP
Bring it into your plan.
Keep rooms, measurements and choices together in the Project Builder.
Related scopes
Research sources & pricing notes
Reviewed 2026-10-23. Published ranges describe the source’s stated scope and geography; they are not an Oklahoma adjustment or a Coastal estimate. Do not add overlapping project ranges together.
- Concrete footing cost — HomeGuide · US national
Stock photograph license · Finish swatches and scope diagrams are original illustrations.