What is the phone number for National Building Services?

(516) 916-6006. You call National Building Services directly; AssistAnt never sits in the middle.

Where is National Building Services?

National Building Services serves Smithtown, NY as a service-area business (no street address shown).

Is National Building Services still in business?

Listed from public business records, last updated October 13, 2026. Call to confirm.

Is National Building Services licensed and insured?

Not verified by AssistAnt yet. Ask for proof of license and insurance before you hire.

Who else is near Smithtown?

AssistAnt lists 450 cleaning companies near Smithtown. Closest to National Building Services: Strike Force Maintenance Corp (0.2 mi), SERVPRO of Greater Smithtown (0.6 mi), Power Clean (1.6 mi).

National Building Services · (516) 916-6006

AssistAnt › Pro directory › Smithtown, NY

What we do

Services

🛠️Cleaning (home, office, carpet, pressure washing)

Checked, with dates

🧾 Trust Card · 2 receipts

Listed in the AssistAnt 24/7 directoryBusiness record from Overture Maps open business data (CDLA-Permissive-2.0).
Oct 13
Shown as open for business in the source dataOperating status in the business record.
Oct 13

Not verified yet: Owner has not confirmed this listing yet; License and insurance not reviewed by AssistAnt yet; No AssistAnt job history linked to this listing yet.

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In their words

Customer reviews

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Where

Service area

Map of the Smithtown, NY area (© Google). Is this your business? Claim it and put up your own photos →

About National Building Services

National Building Services is listed on AssistAnt for cleaning (home, office, carpet, pressure washing) in Smithtown, NY.

Built from public business information. Call to confirm before you go.

Contact

Phone: (516) 916-6006
Website: natlbuildingservices.com
Location: Smithtown, NY, 11767 (service area)
Booking: Not bookable online yet. Call the business directly.

Listed from public recordsNot verified yet. Details come from open business data and may be out of date.See the Trust Card: what we checked, how and when →

Quick facts about National Building Services

What is the phone number for National Building Services?: (516) 916-6006. You call National Building Services directly; AssistAnt never sits in the middle.
Where is National Building Services?: National Building Services serves Smithtown, NY as a service-area business (no street address shown).
Is National Building Services still in business?: Listed from public business records, last updated October 13, 2026. Call to confirm.
Is National Building Services licensed and insured?: Not verified by AssistAnt yet. Ask for proof of license and insurance before you hire.
Who else is near Smithtown?: AssistAnt lists 450 cleaning companies near Smithtown. Closest to National Building Services: Strike Force Maintenance Corp (0.2 mi), SERVPRO of Greater Smithtown (0.6 mi), Power Clean (1.6 mi).

On AssistAnt 24/7

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AI Visibility Score

Not scored yet. Claimed shops get a score and a town rank.

This score measures how visible this business is to AI assistants. It is not a grade of their work. How it’s scored

What the AIs say

Not checked yet for Smithtown. Claim this page and we’ll ask ChatGPT and Claude for you, free.

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Other cleaning companies nearby

Strike Force Maintenance CorpSmithtown, NY · 0.2 mi
SERVPRO of Greater SmithtownNesconset, NY · 0.6 mi
Power CleanSmithtown, NY · 1.6 mi
Long Island Rug Cleaning ServiceSmithtown, NY · 1.9 mi
Manantial Cleaning Services IncSmithtown, NY · 2.0 mi
Mr GrimeLake Grove, NY · 2.4 mi

All cleaning companies near Smithtown, NY (450) →

Every trade and local freelancer in Smithtown →

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