Family room
Add a dedicated gathering space with flexible furniture layout.
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.
ADDITIONS & CONVERSIONS
Living space expansions
Expand everyday living space while improving the connection between old and new rooms. Confirm the structural opening and furniture layout before deciding on windows, roof lines and finish transitions.
START WITH THE DETAILS
What goes into
the work.
Measure the proposed footprint, ceiling height and connection to the existing home. Separate new conditioned area from converted existing area.
Typical scope to confirm
- Plan seating, circulation and daylight
- Design the opening into the existing home
- Coordinate foundation, roof and enclosure transitions
- Extend agreed systems and align interior finishes
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$125per sq ft
Middle$150per sq ft
High$175per 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
- Width of structural opening
- Added floor area and glazing
- Roof geometry and matching existing finishes
What the reference covers
- New room construction and standard completion
Allow for these separately
- Kitchen reconstruction unless listed
- Whole-home flooring replacement beyond defined transitions
- Kitchen or bathroom package
- Major structural alteration outside the addition
KNOW WHAT COMES NEXT
From first idea to finished work.
Plan the scope
Review the new living area and wall or roof tie-ins.
Prepare and approve
Develop plans, assess foundations, obtain approvals and order key products.
Complete the work
Build foundations and structure, tie in the envelope, then complete trades and finishes.
Review and close out
Complete inspections, restore access and review the finished addition.
- Planning & preparation
- 6–16+ weeks
- Work on site
- 8–20+ weeks
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.
Engineering and approval scope · Tie-ins and occupied-home phasing · Site conditions, weather and procurement
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
Find your finish.
These original swatches show a general visual direction. Confirm a physical sample, exact finish code and product compatibility before ordering.
Exterior color direction
Interior finish direction
Stone-look tile
Illustrative tile direction; final material and slip rating are separate selections.
Use this directionPRODUCT 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.
James Hardie
Exterior siding option to integrate the expansion.
Explore example photos
Open the original source for product and installation imagery. These are reference links, not Coastal project photographs.
Source home-addition photograph shows an exterior room expansion. 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 living space expansions options, personalize the details, then upload a photo to create an AI concept.
Family room
Add a dedicated gathering space with flexible furniture layout.
- Space use: Living room
- Main color / finish: Soft white
- Custom product, finish code, or request: Family room. Finish direction: Soft white. Add a dedicated gathering space with flexible furniture layout.
Dining expansion
Create room for a larger table and clear circulation.
- Main color / finish: Blue gray
- Custom product, finish code, or request: Dining expansion. Finish direction: Blue gray. Create room for a larger table and clear circulation.
Open connection
Explore a wider connection subject to structural review.
- Main color / finish: Sage
- Custom product, finish code, or request: Open connection. Finish direction: Sage. Explore a wider connection subject to structural review.
FROM INSPIRATION TO YOUR SPACE
Your home. This direction.
The example photo is inspiration. Your personalized concept applies your saved service and finish selections to the photo you upload.
- 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.
- Home addition cost — HomeGuide · US national
- Hardie Plank lap siding — James Hardie · US national
Stock photograph license · Finish swatches and scope diagrams are original illustrations.