Home Additions Miami:
Expand Your Living Space
Add space and value to your home with expert home additions. Second stories, master suites, room additions, in-law suites. Licensed contractor serving Miami for 20+ years.
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Expand your Miami home without moving with expert home additions from Royal Builders Miami. Whether you need more bedrooms, a larger kitchen, a luxurious master suite, or a second story, our licensed general contractors deliver seamless home additions in Miami that blend perfectly with your existing structure. With over 20 years of experience, we specialize in room additions, second story additions, master suite expansions, in-law suites, garage conversions, and sunroom additions—all designed to enhance your lifestyle and increase your property value.
Our comprehensive home addition services in Miami include second story additions (add 800-2,000 sq ft above), master bedroom and bathroom additions, family room and living space expansions, kitchen extensions for open-concept layouts, in-law suites with private entrances, garage conversions to living space, sunrooms and Florida rooms, home office additions, and bathroom additions. We serve homeowners throughout Miami-Dade County including Coral Gables, Coconut Grove, Pinecrest, Miami Beach, Key Biscayne, Brickell, Kendall, and surrounding areas. From architectural design to final inspection, we manage every detail of your home addition project.
Professional home addition - seamlessly expanding Miami homes with expert craftsmanship
Why Choose Royal Builders Miami for Home Additions
🏗️ Structural Engineering Experts
Every addition includes complete structural engineering to ensure your existing foundation and walls safely support new construction. Miami-Dade approved designs.
🎯 Seamless Integration
Our additions match your home's existing architecture, roofline, siding, and finishes perfectly. No one will know it's an addition—it looks original.
✅ Licensed & Insured
Fully licensed Florida general contractor with comprehensive liability and workers' compensation insurance. All additions meet Miami-Dade building codes.
🌀 Hurricane-Resistant Construction
All additions built to Miami-Dade's strict hurricane codes with impact windows, reinforced connections, and engineered tie-downs. Category 5 rated.
📋 Turnkey Management
We handle architectural plans, engineering, permits, inspections, all trades, and final certificate of occupancy. You deal with one contractor, not a dozen.
💰 Increase Home Value
Home additions typically return 50-80% of cost in increased home value while avoiding moving expenses, realtor fees, and higher mortgage rates.
Comprehensive Home Addition Services
Second Story Additions
Add 800-2,000 square feet of living space by building up instead of out. Our second story additions include:
- Structural Assessment: Engineering analysis to verify your foundation and walls can support second story
- Foundation Reinforcement: Strengthening existing foundation if needed with piers or footings
- Complete Framing: Wood or steel frame construction with hurricane tie-downs
- New Staircase: Custom interior stairs with premium railings and finishes
- Roofing: Complete new roof with Miami-Dade hurricane certification
- Multiple Bedrooms: Typically add 2-4 bedrooms plus bathrooms
- Matching Exterior: Stucco, siding, windows that match existing home perfectly
- Full Utilities: Extend electrical, plumbing, HVAC to second floor
- Balcony Options: Add outdoor living space with ocean or city views
Master Suite Additions
Create your dream primary bedroom with ensuite bathroom and walk-in closet:
- Spacious Bedroom: 300-500 sq ft master bedroom with tray ceilings, crown molding
- Luxury Master Bath: Dual vanities, walk-in shower, soaking tub, marble or quartz
- Walk-In Closet: Custom closet systems with built-in organization
- Private Entrance: French doors to backyard or patio
- Sitting Area: Morning coffee nook or reading space
- Laundry Access: Convenient second floor laundry option
- Smart Features: Automated lighting, climate control, sound system
Room Additions (Single Story)
Expand horizontally with single-story room additions:
- Bedroom Additions: Add guest bedrooms, children's rooms, home offices (200-400 sq ft)
- Family Room Extensions: Expand living space for entertaining (300-600 sq ft)
- Kitchen Extensions: Create open-concept layouts connecting kitchen to living areas
- Bathroom Additions: Add powder rooms or full bathrooms anywhere in home
- Matching Foundation: Concrete slab matching existing home elevation
- Roof Integration: Seamlessly tie into existing roofline
- Utilities Extension: Connect to existing electrical, plumbing, HVAC
In-Law Suites & Accessory Dwelling Units
Create independent living spaces for aging parents or adult children:
- Full Apartment Addition: 400-800 sq ft with bedroom, bathroom, kitchenette
- Private Entrance: Separate entry from main house for independence
- ADA Accessible: Wheelchair-friendly doorways, grab bars, roll-in showers
- Full Bathroom: Complete with shower or tub, vanity, toilet
- Kitchenette: Compact kitchen with sink, refrigerator, microwave, cooktop
- Separate HVAC: Independent climate control system
- Connected Option: Internal door to main house with privacy lock
Garage Conversions
Transform unused garage space into functional living areas:
- Additional Bedroom: Convert garage to guest bedroom or home office
- Home Gym: Dedicated workout space with rubber flooring, mirrors
- Entertainment Room: Game room, home theater, man cave
- Studio Apartment: Rental unit for additional income
- Flooring Installation: Remove concrete, install insulation and hardwood/tile
- Insulation & Drywall: Proper insulation for Miami climate, finished walls
- Windows & Doors: Replace garage door with walls, windows, entry door
- Climate Control: Extend HVAC or install mini-split system
Sunrooms & Florida Rooms
Enjoy Miami's beautiful weather year-round with climate-controlled sunrooms:
- Three-Season Rooms: Screen enclosures with ceiling fans for spring, fall, winter
- Four-Season Rooms: Fully insulated with impact windows and HVAC
- Floor-to-Ceiling Glass: Panoramic views of pool, garden, or waterfront
- Tile or Wood Flooring: Durable floors appropriate for outdoor exposure
- Outdoor Living: Perfect for breakfast nook, reading room, yoga studio
- Hurricane-Rated: Impact-resistant glass and reinforced framing
Second story addition - doubling living space while staying in your Miami neighborhood
Home Addition Costs in Miami
Understanding addition costs helps you plan your expansion project. Our transparent pricing includes architectural design, engineering, permits, construction, and all finishes.
Home Addition Cost Per Square Foot
| Addition Type | Cost Per Square Foot | Quality Level |
|---|---|---|
| Standard Quality Addition | $128 - $180 | Standard finishes, basic materials |
| Premium Quality Addition | $180 - $257 | Upgraded finishes, quality materials |
| Luxury Quality Addition | $257 - $400+ | High-end finishes, custom features |
| Second Story Addition | $225 - $400 | Includes structural reinforcement, stairs |
Complete Addition Project Costs
| Addition Type | Typical Size | Estimated Total Cost |
|---|---|---|
| Simple Room Addition | 200-500 sq ft | $80,000 - $150,000 |
| Master Suite Addition | 400-600 sq ft | $100,000 - $200,000 |
| Family Room Addition | 300-500 sq ft | $85,000 - $165,000 |
| Kitchen Extension | 200-400 sq ft | $75,000 - $180,000 |
| In-Law Suite Addition | 400-800 sq ft | $110,000 - $280,000 |
| Second Story Addition | 800-1,500 sq ft | $300,000 - $700,000 |
| Garage Conversion | 400-600 sq ft | $40,000 - $90,000 |
| Sunroom/Florida Room | 200-400 sq ft | $30,000 - $100,000 |
Additional Home Addition Costs
| Service | Average Cost | Notes |
|---|---|---|
| Architectural Plans | $3,000 - $8,000 | Custom designs for your addition |
| Structural Engineering | $2,000 - $5,000 | Required for all additions |
| Building Permits | $1,500 - $5,000 | Based on addition value and scope |
| Foundation Reinforcement | $5,000 - $20,000 | If needed for second story additions |
| HVAC Extension | $3,000 - $8,000 | Ductwork and vents to new space |
| Electrical Service Upgrade | $2,000 - $6,000 | If additional capacity needed |
| Plumbing Extensions | $2,500 - $7,000 | For bathrooms and kitchens |
| Interior Staircase | $8,000 - $20,000 | For second story access |
Miami Home Addition Gallery
Beautiful home additions seamlessly integrated with existing homes throughout Miami.
Pinecrest Second Story
Added 1,600 sq ft: master suite, 2 bedrooms, 2 baths. Seamless integration.
Luxury Master Suite
Coral Gables expansion. 550 sq ft bedroom, spa bath, custom walk-in closet.
Family Room Expansion
Kendall home. 480 sq ft family room with vaulted ceilings, French doors to pool.
In-Law Suite Addition
Coconut Grove. 650 sq ft apartment: bedroom, full bath, kitchenette, private entry.
Four-Season Sunroom
Miami Beach home. 320 sq ft with impact windows, tile floor, ocean views.
Kitchen Extension
Brickell condo bump-out. 180 sq ft created open-concept kitchen and dining.
Before & After Home Addition Transformations
See dramatic expansions that transformed homes. Drag the slider to reveal the addition!
Pinecrest Second Story Addition
Investment: $485,000 | Timeline: 8 months
Added 1,600 sq ft: master suite, 2 bedrooms, office, 2 baths. Home value increased $320,000.
Coral Gables Master Suite Expansion
Investment: $165,000 | Timeline: 5 months
550 sq ft luxury master: bedroom, spa bath, walk-in closet. Seamless roofline match.
Your Home Addition Journey
Our proven process delivers seamless additions that enhance your home's value and your family's lifestyle.
Consultation & Assessment
We evaluate your property, discuss your needs, review existing home structure, and provide preliminary designs. Free consultation with ballpark estimates to determine feasibility.
Design & Engineering
Architects create custom plans that match your home's style. Structural engineers ensure safe load-bearing. 3D renderings show exactly what your addition will look like.
Permits & Approvals
We handle all building permits, HOA approvals, and impact fees. Our relationships with Miami-Dade building department expedite the process (typically 6-10 weeks).
Foundation & Framing
For second stories, we reinforce existing foundation if needed. New foundations poured for horizontal additions. Expert framing with hurricane-rated connections throughout.
Construction & Systems
Roofing, exterior finishes matched to existing home. Electrical, plumbing, HVAC extended to new space. Impact windows and doors installed. All inspections passed.
Interior Finishes & Final
Flooring, cabinetry, countertops, paint, lighting—all to your specifications. Final walkthrough and punch list. Certificate of Occupancy obtained. Enjoy your expanded home!
Home Additions Requirements in Miami
Structural Considerations for Miami Additions
Miami's strict building codes require proper engineering for all home additions. Key structural considerations include foundation capacity assessment (can your existing foundation support added weight?), load-bearing wall analysis for openings and connections, roof tie-in engineering (how addition roof connects to existing), hurricane-resistant framing with metal connectors and straps, proper footings and reinforcement for vertical additions, and Miami-Dade approved structural plans stamped by licensed engineer. We never guess—every addition includes complete structural engineering to ensure safety and code compliance.
Foundation Requirements
Second Story Additions: Your existing foundation was designed to support one story. Adding a second story requires structural evaluation and often reinforcement. We may need to add helical piers, new footings around perimeter, or underpinning to distribute the additional load. Homes built before 1970 almost always need foundation work for second stories.
Horizontal Additions: New single-story additions require foundations matching your existing home's elevation and construction type. In flood zones, we must match Base Flood Elevation (BFE) requirements. Coral rock and limestone common in Miami require special excavation techniques. We ensure new and old foundations are properly tied together to prevent settling or separation.
Roof Integration Challenges
Seamlessly connecting your addition's roof to existing roofing is critical for weather-tightness. Our roofing integration includes proper flashing at all roof connections, valleys engineered for water drainage, matching roof pitch and overhang dimensions, tile or shingle matching for cohesive appearance, ice and water shield at critical junctions, and secondary water barriers required by Miami-Dade code. Poor roof connections are the #1 cause of leaks in additions—we get it right the first time.
Matching Existing Architecture
Your addition should look like it was always part of your home. We match exterior finishes perfectly including stucco texture and color (we bring samples to match exactly), window styles, sizes, and trim details, roofing materials and colors, siding profiles and reveals, trim work and architectural details, and paint colors throughout. Our additions are so seamlessly integrated that neighbors won't notice the expansion unless you tell them.
HVAC Capacity & Efficiency
Adding 400-1,600 square feet to your home significantly impacts heating and cooling. Options include extending existing HVAC if capacity allows (typically only works for small additions under 400 sq ft), upgrading to larger HVAC system for entire home (more efficient long-term), installing separate mini-split system for addition only (gives independent climate control), or designing zoned system with multiple thermostats. We perform load calculations to determine exactly what your addition needs for comfort in Miami's climate.
Permitting & Timeline
Home additions in Miami require extensive permitting. Timeline expectations include 2-3 weeks for architectural plans and engineering, 6-10 weeks for building permit approval (we can expedite), 5-10 months for construction depending on size, and 1-2 weeks for final inspections and Certificate of Occupancy. Total project timelines: small room additions (4-6 months), master suite additions (5-7 months), and second story additions (8-12 months). We provide realistic schedules and keep you informed weekly.
Frequently Asked Questions
How much does a home addition cost in Miami?
Home additions in Miami cost $128-$257 per square foot for standard to premium quality, or $257-$400+ for luxury additions. Complete project costs include simple room addition (200-400 sq ft): $80,000-$150,000, master suite addition (400-600 sq ft): $100,000-$200,000, and second story addition (800-1,500 sq ft): $300,000-$700,000. Costs include architectural design, engineering, permits, all construction, and finishes. Second stories cost more per square foot due to foundation reinforcement, stairs, and complexity.
Can I add a second story to my Miami home?
Most Miami homes can support second story additions with proper engineering. We assess your existing foundation capacity, check structural integrity of walls, review zoning height restrictions, evaluate roof replacement needs, and determine if foundation reinforcement is required. Homes built before 1970 often need foundation work. Concrete block homes typically handle second stories better than frame homes. We provide structural evaluation during consultation to determine feasibility and costs.
How long does a home addition take in Miami?
Home addition timelines in Miami include simple room addition: 4-6 months total (2-3 weeks design, 6-8 weeks permits, 2-4 months construction), master suite addition: 5-7 months total, and second story addition: 8-12 months total (3 months design/permits, 5-9 months construction). Permitting takes 6-10 weeks in Miami-Dade County. We provide detailed timelines with your contract and send weekly progress updates with photos.
Do I need permits for a home addition in Miami?
Yes, all home additions in Miami require building permits. Required permits include building permit (structural and construction approval), electrical permit (for all electrical work), plumbing permit (if adding bathrooms or kitchens), mechanical permit (HVAC extensions), and final inspection and Certificate of Occupancy. Permit costs range $1,500-$5,000 depending on addition size. We handle the entire permit process including applications, plan submissions, inspection scheduling, and obtaining final CO. Unpermitted additions cause major issues when selling your home.
Will my home addition match my existing house?
Absolutely—seamless integration is our specialty. We match exterior stucco texture and color exactly, match roofing materials, pitch, and overhang, use same window styles and trim details, match siding, trim, and architectural details, and continue interior finishes (flooring, molding, paint). We bring material samples to ensure perfect color matching. Our additions look original to your home—neighbors won't notice the expansion. Poor integration is obvious and looks like an afterthought. We never compromise on matching quality.
Can I stay in my home during the addition?
Yes, most homeowners stay in their home during construction. We work outside when possible (additions typically built from exterior), use plastic barriers to contain dust, maintain access to one bathroom and kitchen, schedule noisy work during daytime hours, and minimize disruption to daily routines. Second story additions are easier to live through since work happens above you. Master suite and room additions may require temporary kitchen relocation for a few weeks. We discuss logistics during planning to set proper expectations.
How much value does a home addition add?
Home additions typically return 50-80% of investment in increased home value. ROI varies by addition type: second story additions return 60-75% (but let you stay in desirable neighborhood), master suite additions return 55-70%, family room additions return 50-65%, bathroom additions return 60-70%, and sunrooms return 45-55%. In high-demand Miami neighborhoods like Coral Gables and Pinecrest, additions can return 80%+ because inventory is limited. Plus you avoid moving costs, realtor fees (6%), and higher mortgage rates on new home purchases.
Do I need an architect for a home addition?
Yes, all home additions require architectural plans for permit approval. Miami-Dade County requires stamped architectural drawings showing floor plans, elevations, structural details, and building sections. We include architectural design in our pricing (typically $3,000-$8,000 depending on complexity). Our architects specialize in additions and know exactly what Miami building department requires. DIY plans won't be approved. Working with our in-house architects streamlines the process and ensures your addition integrates perfectly with your existing home.
What's better: adding up or adding out?
It depends on your lot and goals. Add up (second story) when: lot size is limited, you want to preserve yard space, zoning restricts horizontal expansion, or you want to maximize limited Miami lot. Add out (horizontal) when: foundation can't support second story, budget is tighter (typically 20% less expensive), or you prefer single-story living. Second stories cost more but work well on small Miami lots. We evaluate both options during consultation and recommend the best solution for your property and budget.
Can you add a bathroom to my home?
Yes, bathroom additions are very common. We can add bathrooms in three ways: add to existing room (carve bathroom from large bedroom or closet), bump-out addition (extend exterior wall 40-80 sq ft), or include in larger addition (second story or master suite). Bathroom addition costs $15,000-$40,000 depending on size and finishes. Critical considerations include plumbing access (need to extend water and drain lines), ventilation requirements (exhaust fan or window required), and electrical needs (GFCI outlets, lighting, fan). We handle all plumbing permits and inspections.
Ready to Expand Your Miami Home?
Schedule a free consultation to discuss your home addition project.
CALL (954) 737-2757- Free consultation and structural assessment
- Complete design, engineering, and permitting included
- Licensed general contractor with 20+ years experience
- Seamless integration matching your existing home
- Hurricane-resistant construction exceeding code
- 210+ five-star reviews from satisfied homeowners
Serving All Miami & South Florida Communities
We build home additions throughout Miami-Dade County and surrounding areas.
Building dreams into reality with quality craftsmanship and professional service across South Florida.
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ADDRESS
1401 Sawgrass Corporate Pkwy, Suite 217, Sunrise, FL 33323
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