Looking for home addition contractors near you in Herndon? Vision Custom Build & Remodel is a licensed Class A Town of Herndon / Fairfax County contractor that designs and builds bump-outs, second-story additions, primary suites, sunrooms, and in-law additions across Herndon and the surrounding area.
Why Herndon homeowners pick Vision Custom
Herndon homes are typically victorian-era downtown homes, 1980s colonials, and franklin farm era two-stories — which means every addition has to be designed around the actual floor plan, foundation, and roofline of your house, not a generic template. The Town of Herndon issues its own permits and the Heritage Preservation Review Board reviews exterior work in the historic district near Elden Street. Outside town limits you're under Fairfax County — we confirm the line before scoping.
We serve every Herndon neighborhood including Historic Downtown Herndon, Kingstream, Franklin Farm, McNair Farms, and Dranesville — across ZIP codes 20170, 20171, 20172.
Permits in Town of Herndon / Fairfax County
Every home addition in Herndon requires sealed architectural and structural drawings plus permits through the Town of Herndon Community Development. We package the full submission, walk it through plan review, schedule each inspection, and meet the inspector on site. You never sit in a permit office.
What's included
Design & engineering
Architectural drawings, structural engineering, HOA submission package.
Permits & zoning
Variances, setbacks, and permit packages handled with every NOVA jurisdiction.
Foundation
Footings, crawlspace or full basement foundation, waterproofing, tie-in to existing.
Framing & roof
Engineered framing, roof tie-in, matching shingles, siding, and exterior trim.
Systems extension
HVAC ductwork, electrical panel upgrades, plumbing rough-in, insulation.
Interior finish
Flooring, paint, trim, cabinetry, and finish work matched to existing home.
Pricing
| Project Type | Typical Range | Timeline |
|---|---|---|
| Bump-out (kitchen or bath extension) | $45,000 – $90,000 | 2 – 4 months |
| Single-room addition (bedroom, sunroom) | $85,000 – $180,000 | 3 – 5 months |
| Primary suite addition | $180,000 – $300,000 | 5 – 7 months |
| Second-story addition | $250,000 – $500,000+ | 6 – 10 months |
Ranges reflect completed Town of Herndon / Fairfax County projects. Final quotes after in-home consultation.
FAQs
How much does a home addition cost in Herndon, VA?
Bump-outs in Herndon start around $45K. Single-room additions run $85K–$180K. Primary suite additions run $180K–$300K. Second-story additions run $250K+. Town of Herndon / Fairfax County permit, labor, and engineering costs run higher than national averages.
How long does a home addition take in Herndon?
Plan on 4–8 months end-to-end. Design and permitting through Town of Herndon Community Development take 2–4 months. Construction runs 3–6 months after demo.
Do I need a permit for a home addition in Herndon?
Yes. Every addition requires sealed architectural and structural drawings plus permits through Town of Herndon Community Development. We handle the entire submission, plan review, and inspection process.
Will the addition match my existing Herndon home?
Yes. We match siding, trim, roof pitch, shingle color, and interior finishes. Older Herndon homes sometimes require custom-milled trim — we handle that in-house.
Can I live in the house during the addition?
Usually yes. Most additions are sealed off from the existing home with temporary walls and dust barriers. The breakthrough to existing space is scheduled near the end and typically takes 2–3 days.
Herndon Reviews
“Added a 400 sq ft family room to our Franklin Farm colonial. The roofline tie-in looks original to the house — nobody can tell where the addition starts. Aaron walked the inspections himself.”
Allison D.
Herndon, VA · Home Addition
Find Us
Business Name
Vision Custom Build & Remodel
Address
Herndon, VA 20170
Town of Herndon / Fairfax County
Phone
703-420-5274Hours
Mon – Fri: 8:00 AM – 6:00 PM
Service Area
We serve all Herndon neighborhoods including Historic Downtown Herndon, Kingstream, Franklin Farm, McNair Farms, and Dranesville. Free in-home estimates anywhere in Town of Herndon / Fairfax County.
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