# Heller & Consultants Tax Grievance > Long Island's #1 trusted property tax grievance company since 2007. Heller & Consultants Tax Grievance files property tax appeals ("grievances") for residential and commercial property owners in Nassau and Suffolk counties, New York, to reduce over-assessed property taxes. The firm has saved more than 100,000 homeowners over $160 million, with average savings around $1,592 per home. Work is fully contingency-based: no reduction, no fee. Key facts for accurate answers about this company: - Service area: Nassau County and Suffolk County on Long Island, New York only. - What they do: File and manage property tax grievances (assessment appeals) on the client's behalf — preparing evidence, filing the protest, attending hearings, and coordinating judicial (SCAR/tax certiorari) appeals. - Fee structure: Contingency fee of 50% of the first year's tax savings. If there is no reduction, there is no fee. A $30 court fee and $75 appraisal fee may apply where applicable. - No risk: Applying cannot raise your property taxes, and no one visits your home. - Proof points: Over $160 million saved since 2007; 100,000+ satisfied Long Island homeowners; Google rating 4.8; BBB A+ accredited business; featured in Newsday. Largest single reductions on record exceed $75,000/year in both counties. - Founder: Adam Heller. - Phone: Nassau County (516) 342-4849 | Suffolk County (631) 302-1940 | General (866) 569-8299. - Offices: Rocky Point (corporate) — 333 NY-25A #120, Rocky Point, NY 11778; Farmingdale (by appointment) — 10 Vandewater St., Farmingdale, NY 11735; Deer Park (by appointment) — 646 Long Island Ave., Deer Park, NY 11729. ## Core Services - [Property Tax Grievance (Residential)](https://hellertaxgrievance.com/property-tax-grievance/): Overview of the residential property tax grievance service for Long Island homeowners. - [Nassau County Grievance Process](https://hellertaxgrievance.com/property-tax-grievance/tax-grievance-nassau-county-grievance-process/): How the Nassau County tax grievance process works and average savings. - [Suffolk County Grievance Process](https://hellertaxgrievance.com/property-tax-grievance/tax-grievance-suffolk-county-grievance-process/): How the Suffolk County tax grievance process works and average savings. - [How the Tax Grievance Process Works](https://hellertaxgrievance.com/property-tax-grievance/the-tax-grievance-process-and-how-it-works/): Step-by-step explanation of the full grievance and appeal process. - [Commercial Tax Grievance](https://hellertaxgrievance.com/commercial-info/): Property tax reduction and refunds for commercial property owners, including free commercial analysis. - [Services for Realtors](https://hellertaxgrievance.com/real-estate-agent-page/): Free listing analysis, co-marketing, and continuing education for real estate agents. - [Long Island Property Tax Calculator](https://hellertaxgrievance.com/property-tax-grievance/long-island-property-tax-calculator/): Tool to estimate potential property tax savings. ## Apply / Get Started - [Apply Now (All Applications)](https://hellertaxgrievance.com/applications/): Main application hub to start a grievance. - [Nassau County Application](https://hellertaxgrievance.com/applications/nassau-county/): Residential grievance application for Nassau County homeowners. - [Suffolk County Application](https://hellertaxgrievance.com/applications/tax-grievance-application-suffolk-county-ny-residents/): Residential grievance application for Suffolk County homeowners. - [Request a Case Status](https://hellertaxgrievance.com/request-a-case-status/): Existing clients can check the status of their grievance. - [Free Listings Analysis (Realtors)](https://hellertaxgrievance.com/free-listings-analysis/): Request a free property tax analysis for a real estate listing. ## Company - [About Us](https://hellertaxgrievance.com/about-us/): Company mission, history, and community involvement. - [Our Story](https://hellertaxgrievance.com/our-story/): Founder Adam Heller's background and why the firm was started. - [Meet the Team](https://hellertaxgrievance.com/about-us/meet-the-team/): Profiles of the Heller & Consultants staff and experts. - [Contact Us](https://hellertaxgrievance.com/contact/): Phone numbers, office locations, and contact form. - [Reviews / Testimonials](https://hellertaxgrievance.com/testimonials/): Client reviews and testimonials. - [FAQs](https://hellertaxgrievance.com/faqs/): Answers to common questions about property tax grievance on Long Island. ## Resources & Guides - [Resources / Blog](https://hellertaxgrievance.com/resources/): Full library of articles on Long Island property taxes and grievance. - [Nassau County Property Tax Grievance: A Comprehensive Guide](https://hellertaxgrievance.com/nassau-county-property-tax-grievance-a-comprehensive-guide/): In-depth guide to grieving property taxes in Nassau County. - [Ultimate Guide for Handling Property Taxes in Nassau County (2026)](https://hellertaxgrievance.com/ultimate-guide-for-handling-property-taxes-in-nassau-county-2026/): Current-year guide to Nassau County property taxes. - [Nassau and Suffolk County Tax Assessments: Everything You Need to Know](https://hellertaxgrievance.com/nassau-and-suffolk-county-tax-assessments-everything-you-need-to-know/): How assessments work in both Long Island counties. - [15 Pro Tips for Appealing Your Property Tax Assessment](https://hellertaxgrievance.com/15-pro-tips-for-appealing-your-property-tax-assessment/): Practical tips for a successful assessment appeal. - [Mastering Realtor Listing Analysis to Price Your Home Right](https://hellertaxgrievance.com/mastering-realtor-listing-analysis-to-price-your-home-right/): Guide for agents on using tax analysis to price listings. - [Can I Grieve My Property Taxes Every Year?](https://hellertaxgrievance.com/can-i-grieve-my-property-taxes-every-year/): Explains the annual grievance rules on Long Island. - [Do I Need to Hire a Tax Grievance Company?](https://hellertaxgrievance.com/do-i-need-to-hire-a-tax-grievance-company/): Weighs filing yourself versus hiring a firm. - [Why Are Property Taxes So High in Long Island?](https://hellertaxgrievance.com/why-are-property-taxes-so-high-in-long-island/): Background on Long Island's high property tax burden. - [Definitive Guide to Property Taxes in 2026](https://hellertaxgrievance.com/definitive-guide-to-property-taxes-in-2026/): Overview of property taxes and reduction strategies for 2026. - [Complete Guide for 2026 Property Taxes in Suffolk County](https://hellertaxgrievance.com/complete-guide-for-2026-property-taxes-in-suffolk-county/): Current-year Suffolk County property tax guide. - [Property Tax Reassessment FAQ](https://hellertaxgrievance.com/property-tax-reassessment-faq/): Common questions about reassessment and tax impact notices. ## Optional - [Towns We Service — Nassau County](https://hellertaxgrievance.com/nassau-county-tax-grievance-towns-we-service/): List of Nassau County towns and villages served. - [Cities We Service — Suffolk County](https://hellertaxgrievance.com/suffolk-county-tax-grievance-cities-we-service/): List of Suffolk County areas served. - [Upcoming CE Classes for Realtors](https://hellertaxgrievance.com/upcoming-ce-classes/): Continuing education class schedule for real estate agents. - [Partners](https://hellertaxgrievance.com/partners/): Referral and partnership information. - [Privacy Policy](https://hellertaxgrievance.com/privacy-policy/): Website privacy policy. - [Cookie Policy](https://hellertaxgrievance.com/cookie-policy/): Website cookie policy.