Home Additions
New rooms, second stories, and bump-outs planned from foundation to finish. Bergen Restoration plans and builds home additions across Bergen County.
Room Additions & Expansions
When your home needs more space, we build it. From single-room additions to multi-room expansions, we handle architectural planning, permits, foundation, framing, and finishes — seamlessly connecting new construction to your existing home.
- Single & multi-room additions
- Foundation & structural framing
- Roof extension & tie-in
- Electrical, plumbing & HVAC integration
- Interior finishing & trim
- Exterior siding & roofing match
Serving Bergen County homeowners across Englewood, Tenafly, Fort Lee, Ridgewood, Paramus, Teaneck, Hackensack, Closter, Alpine, Cresskill, Demarest, Bergenfield, Fair Lawn, Glen Rock, and Oradell — plus every town in between.
Built Around Addition Type
Each addition type has its own scope, structural approach, and permit path. Pick the type that fits your home and household.
Room Additions
Ground-floor expansions for family rooms, dining, or office space. Foundation, framing, mechanicals, and finish coordinated as one scope.
Explore this optionSecond-Story Additions
Adding a full second floor with foundation reinforcement, structural framing, and mechanical-system upgrade.
Explore this optionKitchen Additions
Bumping out the kitchen footprint with new foundation, integrated cabinets, and appliance and lighting plan.
Explore this optionPrimary Suite Additions
Master bedroom, bath, and walk-in closet with mechanicals, premium finishes, and sound-isolated layout.
Explore this optionBathroom Addition
New bathroom plumbing, electrical, ventilation, and finish coordinated with existing wet-wall structure.
Explore this optionGarage Additions
Single, double, or three-car garages. Attached or detached. Optional living space above with full mechanicals.
Explore this optionSunrooms & Enclosed Porches
Three-season rooms, four-season sunrooms, and screened porches with proper foundation and tie-in to existing structure.
Explore this optionIn-Law Suite Additions
Independent living space with bedroom, bath, kitchenette, and separate HVAC. Permit and zoning paths vary by Bergen County town.
Explore this optionPlan Your Addition With Confidence
Practical planning guidance from registered Bergen County builders. Click any category to see detail.
Addition Cost by Type
Home additions in Bergen County run $275–$600+ per square foot for 2026 depending on type and complexity. Ranges below cover typical scenarios; lot conditions and structural requirements shift the final number.
- Bump-out (1 room, 150–300 sq ft): $60,000–$160,000 · 10–16 weeks.
- Ground-floor addition (300–600 sq ft): $110,000–$275,000 · 3–5 months.
- Primary suite addition (500–800 sq ft): $180,000–$350,000 · 4–7 months.
- Second-story addition (full floor): $275,000–$600,000+ · 5–9 months.
- Cost per sq ft: horizontal $275–$450; second-story $400–$600+; below-grade additions rare.
Planning a project like this? Get an estimate.
Lot & Zoning
Before design work starts, zoning feasibility has to be confirmed. Bergen County towns each have their own setback, FAR, height, and coverage rules.
- Setback review: front, side, rear; addition must fit within them or trigger variance.
- Floor-area ratio (FAR): limits total building area relative to lot size.
- Height limits: second-story additions may hit town max height, especially on raised-ranch or split-level homes.
- Lot coverage: hardscape + building footprint can't exceed town-specific percentage.
- Variance process (2026 Bergen County): $5,000–$25,000+ attorney/architect fees, 3–12 months.
Planning a project like this? Get an estimate.
Architecture & Engineering
Most Bergen County additions require architectural drawings and often structural engineering. Small bump-outs sometimes skip architect; larger or structural additions don't.
- Architectural drawings: $3,500–$15,000+ depending on scope.
- Structural engineer: $2,500–$8,000+ for calcs on foundations, beams, load paths.
- Surveyor (required for most permits): $800–$2,000.
- Design-build option: contractor handles coordinated design + engineering under one agreement.
- Small bump-out without architect: possible with engineering review only, if no structural or envelope change.
Planning a project like this? Get an estimate.
Foundation & Systems
Additions trigger foundation work, service capacity reviews, and often HVAC reconfiguration. These are the line items homeowners consistently underbudget.
- Foundation (slab, crawl, or full basement): $18,000–$80,000+ depending on type and depth.
- Underpinning existing foundation (for second-story): $10,000–$40,000 when required.
- Electrical panel upgrade (200A): $2,500–$4,500.
- HVAC zone extension or new zone: $4,500–$12,000.
- Plumbing stack extension or new stack: $2,500–$6,500.
- Water service upgrade: $3,500–$9,000 if existing line is undersized.
Planning a project like this? Get an estimate.
Construction Timeline
Addition projects run 3–9 months on-site, plus 2–6 months of design, engineering, and permit approval before construction. Weather also plays a role.
- Bump-out: 10–16 weeks.
- Ground-floor addition: 3–5 months.
- Primary suite addition: 4–7 months.
- Second-story addition: 5–9 months.
- Design + engineering + permits: add 2–6 months before construction starts.
- Weather: foundation pours and roof dry-in schedule around NJ winters and storms.
Planning a project like this? Get an estimate.
Variances & Approvals
Every Bergen County town runs its own zoning board, planning board, building office, and fee schedule. Approval times vary significantly.
- Building permit: $800–$3,000+ based on declared project value.
- Zoning board application (variance): $500–$2,000 filing fee plus hearings.
- Planning board review: for subdivisions or major site plans.
- Utility disconnect/reconnect fees: $500–$2,500 depending on utility and scope.
- Typical approval window: 3–12 months from submission to permit issuance for additions requiring variance.
Planning a project like this? Get an estimate.
Pricing and timelines are planning ranges. Final cost and schedule depend on site conditions, access, structural requirements, materials, permit review, inspections, weather, material lead times, and scheduling availability.
Your Home Addition Process
Consultation
We visit your home, review scope and priorities, measure, and align on materials and timeline.
Design & selections
We finalize materials, finishes, schedule, and a written scope so the project starts with clear expectations.
Build
Crew executes the build with organized scheduling, regular check-ins, daily cleanup, and trade coordination.
Walkthrough
Final walkthrough together, punch-list closeout, warranty registration, and project sign-off.
Frequently Asked Questions
Bump-outs, room additions, primary suite additions, kitchen expansions, second-story additions, and sunrooms. For commercial additions or accessory dwelling units, we evaluate feasibility during consultation.
For most Bergen County additions, yes. Primary suite additions, second-story additions, and anything with structural implications require architectural drawings. Small bump-outs sometimes work with engineering review only.
We do a feasibility walk-through during consultation — setbacks, FAR, height limits, and lot coverage. Anything beyond that triggers a formal zoning review with your town.
Every project uses a milestone payment schedule tied to agreed phases — set out in writing in your contract. Homeowners who want to finance work typically use third-party home-improvement lenders; we're happy to share the names of lenders other clients have used. Any financing arrangement is between the homeowner and the lender.
For most Bergen County residential projects, 3 to 8 weeks from contract signing to on-site start. Summer and early fall fill fastest. Most planned residential projects are scheduled in advance. We confirm scope, materials, trade coordination, and timing before work begins.
Usually yes. Additions are more livable than renovations of the same rooms because you're building new space rather than displacing existing use. Second-story additions and projects with major systems work may require temporary relocation.
We coordinate with zoning attorneys and architects when a variance is required. Expect $5,000–$25,000+ in process fees plus 3–12 months of timeline.
Most do — especially anything involving foundations, beams, load paths, or second-story work. Structural engineering fees typically run $2,500–$8,000+.
Yes. For projects that require them, we coordinate permit paperwork — building, zoning, and trade permits as applicable — and inspection scheduling through to the Certificate of Occupancy.
All 70 Bergen County municipalities. Residential only.
Yes. Bergen Restoration is a registered New Jersey Home Improvement Contractor (NJHIC# 13VH08865500) with commercial general liability and workers’ compensation coverage; documentation available on request.
Get Your Estimate
Reach us by phone or email and tell us about your home addition project. We will follow up with the next best step for your home.
Commercial general liability and workers’ compensation coverage. Documentation available on request.
Let's Talk About Your Project
Tell us what you have in mind — we'll follow up with a plan.