Room Additions
Ground-floor single-room and multi-room additions — foundations, framing, roofing, electrical, plumbing, HVAC, and finish work tied into the existing home. Family rooms, kitchens-extension, sunrooms, mudrooms, primary suites, and home offices.
Ground-Floor Home Additions
A room addition extends the existing footprint with new foundation, framing, and roof tied into the existing structure. We coordinate architectural plans, structural engineering, permits, foundation excavation, framing, mechanicals, and finish work to match the rest of the home.
- Foundation excavation and footings
- Framing tied into existing structure
- Roof line integration with existing home
- New electrical, plumbing, and HVAC
- Insulation, drywall, flooring, finish work
- Architectural and structural engineering coordination
Serving Bergen County homeowners across Englewood, Tenafly, Fort Lee, Ridgewood, Paramus, Teaneck, Hackensack, Closter, Fair Lawn, and Bergenfield — plus every town in between.
Part of our Home Additions service family · See: Kitchen Addition.
Room Addition Guides
Decisions that determine whether the project lasts and feels right.
Foundation & Frost Line
New foundation tied to existing footings below frost line. Proper waterproofing where new meets old.
- Bergen County residential renovation experience across kitchens, bathrooms, basements, additions, and water-damage rebuilds.
- Written scope, sequenced milestones, and documented material selections before any demolition begins.
Planning a project like this? Get an estimate.
Roof Tie-In Strategy
Matching shingle line, valley flashing, drip edge, and gutter integration. Tied properly so the new roof sheds without leak risk.
- Bergen County residential renovation experience across kitchens, bathrooms, basements, additions, and water-damage rebuilds.
- Written scope, sequenced milestones, and documented material selections before any demolition begins.
Planning a project like this? Get an estimate.
Wall & Insulation Continuity
Wall assembly matched to existing R-value, vapor barrier continuity, and air-sealed transitions.
- Bergen County residential renovation experience across kitchens, bathrooms, basements, additions, and water-damage rebuilds.
- Written scope, sequenced milestones, and documented material selections before any demolition begins.
Planning a project like this? Get an estimate.
HVAC, Plumbing, Electrical
Capacity check on existing systems, extensions with licensed trade coordination, and panel-load review.
- Plumbing, electrical, HVAC, and gas changes coordinated with licensed trade professionals where required.
- Permit-pulled trade work scheduled around inspection windows; rough-in and final inspections sequenced with rebuild milestones.
- Existing system upgrades (panel capacity, supply line size, vent stack routing) verified against new load before finalizing scope.
Planning a project like this? Get an estimate.
Permits & Zoning
Zoning review, setback compliance, and architectural plan review. We coordinate permit and inspection process.
- For projects that require permits, we coordinate permit paperwork, trade documentation, and inspection scheduling with your town and licensed professionals where required.
- Bergen County construction code aligns with NJ UCC; review windows vary by municipality from 1 to 4 weeks.
- Building, plumbing, electrical, and fire sub-permits pulled per scope; CO inspection at completion where applicable.
Planning a project like this? Get an estimate.
Cost & Timeline Guide
Single-room additions $80,000–$200,000+ in Bergen County 2026. Multi-room or full-story additions $180,000–$450,000+. Lead 16–28 weeks.
- Scope tiers, material grade, and labor splits drive total. Mid-range projects typically run 60–70% of high-end equivalents on the same footprint.
- Hidden costs to plan for: permit fees, dumpster, dust protection, and any required structural or trade work uncovered during demo.
- Bergen County projects budget 1–3% for permits and 5–10% contingency on most renovation scopes.
Planning a project like this? Get an estimate.
Your Room Addition Process
Consultation
We walk the property, discuss intent, review setbacks, lot coverage, and any HOA constraints; recommend an architect if not yet engaged.
Scope & materials
Architect produces drawings; structural engineer signs off; permits filed; we finalize materials and schedule.
Build
Crew executes excavation, foundation, framing, roofing, mechanicals, finishes, and inspections.
Final walkthrough
Final walkthrough, certificate of occupancy where required, punch-list closeout.
Frequently Asked Questions
For 2026, single-room ground-floor additions run $90,000-$220,000 depending on size, finishes, and mechanical scope. Premium suites with custom finishes and integrated HVAC run higher. Pricing and timelines are planning ranges.
Most ground-floor room additions take 5-9 months from permit issue to certificate of occupancy. Architectural and engineering review adds 2-4 months before construction begins.
For most additions, yes. Bergen County municipalities require stamped drawings for additions involving foundation and structural work. We work with architects you choose or recommend.
Yes. Building, electrical, plumbing, and trade permits all apply. Inspections happen at framing, rough-in, insulation, and final.
Yes. Bergen Restoration is a registered New Jersey Home Improvement Contractor (NJHIC# 13VH08865500) with commercial general liability and workers' compensation coverage. Documentation is available on request, and homeowners should verify credentials before hiring any contractor.
Get Your Estimate
Reach us by phone or email and tell us about your room 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.