In Hialeah, the right contractor depends on whether a property needs a full renovation, ongoing repair work or a focused upgrade to its windows and doors. A house addition, a retail tenant finish and replacement impact windows follow different work plans and permit paths. These three Florida-licensed businesses publish Hialeah addresses and services that cover those distinct needs.
Match the company to the work
Gencon Construction Group is the broad residential and commercial general contractor in this comparison. It lists room and story additions, garage conversions, patios, kitchens, bathrooms, flooring, windows and doors, plus retail, restaurant, warehouse, office, medical, school and institutional build-outs. Its separate owner-representative service can help an owner review constructability, coordinate designers and contractors, track schedule and payment requests, and organize closeout.
Contractors 911 LLC describes itself as a full-service construction and repair contractor with 24-hour service. Its published portfolio is centered on facility work and renovation or maintenance in churches, offices, warehouses, homes, tenant spaces and retail. The company’s site gives a Hialeah address, while the state license record lists a Florida City main address; call first to confirm where staff meet customers and which entity will appear on the contract.
GIG Windows & Doors has a more specialized role: it manufactures and supplies impact-resistant windows and doors for residential and commercial buildings, including high-rise properties. Its catalog includes single-hung, horizontal-roller and fixed windows, storefront systems, French doors and sliding glass doors. Florida product-approval records include a GIG storefront system; ask the company to match the approved product, installation details and permit submittal to your exact opening and building.
Hialeah’s permit process matters for common upgrades
The City of Hialeah Building Department reviews applications, issues permits and conducts inspections. Its permit guide for common projects includes interior renovations and additions, replacement windows and doors, patios, driveways, roofing, plumbing, electrical and mechanical changes. The city also publishes contractor-registration and building-department information; its registration packet asks state-licensed contractors for the state credential, liability and workers’ compensation documents, a local business tax receipt and qualifier identification.
Before accepting a proposal, use Florida’s state contractor-license search to check the credential and qualifier. The city’s permit approval is a separate step: ask who applies, which trade permits are included, who schedules inspections and how approved product documentation will be supplied. For windows or doors, record the product series and approval number in the written scope instead of relying on a generic “impact-rated” description.
What to request before work begins
For a full remodel, request drawings or a detailed room-by-room scope, material allowances and a schedule that includes inspections. For facility repairs, ask how emergency calls are dispatched, what work is covered by the initial visit and how recurring maintenance is documented. For a window or door replacement, confirm opening measurements, frame and glass specifications, installation, debris removal, warranty and responsibility for permits. If the property is in a condominium, ask who coordinates building management and access.
All three license numbers were checked in the state database on October 31, 2026 and appeared current and active, expiring August 31, 2028. The city or county may require additional registration for local work. Verify the record again before signing and compare proposals that describe the same work, products and inspections.
Define whether the work is a full renovation, a facility repair or a window-and-door project. Then confirm the Hialeah permit requirements, compare written scopes and verify the contractor’s active state record.
Options to compare
These options relate to the question. Read each profile and check current details before deciding.
Hialeah general contractor offering home additions and remodeling, commercial build-outs, and project oversight.
Residential and commercial construction, remodeling and owner-representative project management
Hialeah-listed full-service contractor for facility repairs, renovation and maintenance across South Florida.
Construction repair, renovations and facility maintenance for residential, retail and institutional properties
Hialeah company specializing in high-impact windows and doors for homes, commercial buildings and high-rise properties.
Impact-rated residential and commercial windows, doors, storefront systems, manufacturing and supply
Sources & references
Sources for the information and reporting discussed in this guide.
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Do I need a Permit? ↗
Primary source
City of Hialeah · Accessed October 31, 2026
City list of common jobs requiring a permit, including renovations, additions, windows and doors, roofing, driveways and trade work.
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Building Department ↗
Primary source
City of Hialeah · Accessed October 31, 2026
Permit review, issuance, inspections and contractor registration information.
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Contractor Registration Packet ↗
Primary source
City of Hialeah · Accessed October 31, 2026
Registration requirements for state-licensed and county-licensed contractors.
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Contractor license lookup ↗
Primary source
Florida Department of Business and Professional Regulation · Accessed October 31, 2026
Official state portal for checking Florida construction licenses.
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Official website of Gencon Construction Group ↗
Primary source
Gencon Construction Group · Accessed October 31, 2026
Primary source for identity, concept, menu, and contact details.
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Official website of Gencon Construction Group ↗
Primary source
Gencon Construction Group · Accessed October 31, 2026
Primary source for identity, concept, menu, and contact details.
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Official website of Gencon Construction Group ↗
Primary source
Gencon Construction Group · Accessed October 31, 2026
Primary source for identity, concept, menu, and contact details.
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Official website of Gencon Construction Group ↗
Primary source
Gencon Construction Group · Accessed October 31, 2026
Primary source for identity, concept, menu, and contact details.
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Florida contractor license CGC1511204 ↗
Primary source
Florida DBPR · Accessed October 31, 2026
State database check on October 31, 2026 showed Current, Active; expiration 08/31/2028.
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Official logo image ↗
Primary source
Gencon Construction Group · Accessed October 31, 2026
Gencon Construction Group logo
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Official project photo ↗
Primary source
Gencon Construction Group · Accessed October 31, 2026
Residential remodeling service image published by Gencon Construction Group
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Official project photo ↗
Primary source
Gencon Construction Group · Accessed October 31, 2026
Design-build service image published by Gencon Construction Group
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Official website of Contractors 911 LLC ↗
Primary source
Contractors 911 LLC · Accessed October 31, 2026
Primary source for identity, concept, menu, and contact details.
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Florida contractor license CGC049635 ↗
Primary source
Florida DBPR · Accessed October 31, 2026
State database check on October 31, 2026 showed Current, Active through 08/31/2028; state main address is Florida City.
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Official logo image ↗
Primary source
Contractors 911 LLC · Accessed October 31, 2026
Contractors 911 LLC logo and company banner
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Official website of GIG Windows & Doors ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Primary source for identity, concept, menu, and contact details.
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Official website of GIG Windows & Doors ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Primary source for identity, concept, menu, and contact details.
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Official website of GIG Windows & Doors ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Primary source for identity, concept, menu, and contact details.
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Official website of GIG Windows & Doors ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Primary source for identity, concept, menu, and contact details.
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Florida Building Code product approval FL42523 ↗
Primary source
Florida Building Commission · Accessed October 31, 2026
Approved product record for a GIG impact aluminum storefront system; verify current approval for the exact product before specifying.
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Florida contractor license CGC1513944 ↗
Primary source
Florida DBPR · Accessed October 31, 2026
State database check on October 31, 2026 showed Current, Active; expiration 08/31/2028.
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Official logo image ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
GIG Windows & Doors logo
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Official project photo ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Outswing French door product image from GIG Windows & Doors
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Official project photo ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Window and door example displayed on GIG Windows & Doors’ official site
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Facebook profile ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Directly linked from the company website at https://www.gigwindows.com/; checked in the in-app browser on 2026-10-31.
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Instagram profile ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Directly linked from the company website at https://www.gigwindows.com/; checked in the in-app browser on 2026-10-31.
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Tiktok profile ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Directly linked from the company website at https://www.gigwindows.com/; checked in the in-app browser on 2026-10-31.
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Youtube profile ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Directly linked from the company website at https://www.gigwindows.com/; checked in the in-app browser on 2026-10-31.
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Twitter profile ↗
Primary source
GIG Windows & Doors · Accessed October 31, 2026
Directly linked from the company website at https://www.gigwindows.com/; checked in the in-app browser on 2026-10-31.
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Google Maps listing for Contractors 911 LLC ↗
Community source
Google Maps · Accessed October 31, 2026
Direct check of rating, review count, operating status, and address; variable data.
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Google Maps listing for Gencon Construction Group ↗
Community source
Google Maps · Accessed October 31, 2026
Direct check of rating, review count, operating status, and address; variable data.
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Google Maps listing for GIG Windows & Doors ↗
Community source
Google Maps · Accessed October 31, 2026
Direct check of rating, review count, operating status, and address; variable data.