ADU Hamptons — Expert Home Addition & Guest Suite Builders on the East End

Add a fully permitted ADU, guest cottage, or home addition to your Hamptons property with Black Wall Builders — the trusted contractor serving East Hampton, Southampton, Bridgehampton, and all of the Hamptons with expert design, permitting, and construction since 2016.

  • Detached Cottage ADU
  • Garage Conversion ADU
  • Above-Garage ADU
  • Basement ADU
  • Pool House ADU
  • Modern Prefab ADU
  • Multigenerational Suite ADU
  • Junior ADU (JADU)
  • Luxury Guest House ADU

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    luxury ADU Hamptons

    Hamptons ADU Builders — Add Value & Flexibility to Your East End Property

    At Black Wall Builders, we specialise in designing and building accessory dwelling units and home additions across the Hamptons
    — from garage-to-guest-cottage conversions and detached pool house studios to full home additions that expand your East End
    property. Our ADU Hamptons team navigates local East End zoning, manages all permits, and delivers premium construction from
    foundation to final walkthrough.

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    luxury ADU Hamptons

    ADU Hamptons — Our Full Service

    luxury ADU Hamptons Detached Cottage ADU
    luxury ADU Hamptons Garage Conversion ADU
    luxury ADU Hamptons Above-Garage ADU
    luxury ADU Hamptons Basement ADU
    luxury ADU Hamptons Pool House ADU
    luxury ADU Hamptons Modern Prefab ADU
    luxury ADU Hamptons Multigenerational Suite ADU
    luxury ADU Hamptons Junior ADU (JADU)
    luxury ADU Hamptons Luxury Guest House ADU

    How Your Hamptons ADU Project Works

    01
    Free Consultation & Feasibility Assessment

    We visit your Hamptons property, assess your ADU and addition options, navigate local zoning requirements, and give you an honest assessment of costs and timelines.

    02
    Design & East End Planning

    We develop your full ADU or addition design, work within Hamptons zoning and setback requirements, and prepare all documentation for local municipality permit applications.

    03
    Permits & Pre-Construction

    Our team manages all East End municipality ADU or addition permit applications, structural engineering, and trade coordination —handling every pre-construction step for your Hamptons project.

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    OUR PROJECTS

    Explore our completed remodeling and construction projects across The Hamptons. Each home reflects our commitment to quality, precision, and timeless design.

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    luxury ADU Hamptons
    luxury ADU Hamptons

    TESTIMONIALS

    ★ ★ ★ ★ ★

    Black Wall Builders did an amazing job on our kitchen remodel! They were professional, on time, and kept everything clean. The new layout is perfect, and the quality of their work is top-notch. We’re thrilled with the results and would definitely hire them again!

    Jennifer Stone

    ★ ★ ★ ★ ★

    Black Wall Builders did an outstanding job on our dining room remodel. Their team was professional, punctual, and listened to our needs. The new hardwood floors and custom shelving look amazing, and they finished on time while keeping the space clean. We’re thrilled and would recommend them for any home project!

    Leslie Nguyen

    ★ ★ ★ ★ ★

    Michael was extremely knowledgeable and handled a very challenging situation with professionalism and confidence. Our ADU unit didn’t have any permitting in place, and he clearly understood the complexities involved, guided us through the options, and made the process much easier to navigate. We really appreciated his expertise and calm approach throughout the entire process.

    Jhonny Payam

    FAQ

    Can I build an ADU or guest cottage in the Hamptons?
    Yes, though the specific regulations vary by municipality. East Hampton, Southampton, Bridgehampton, and other Hamptons towns each have their own zoning codes governing ADUs, guest cottages, and home additions — including setback requirements, size limits, and design standards. Black Wall Builders is experienced navigating all local Hamptons regulations and manages the entire permitting process for you.

    How much does an ADU or home addition cost in the Hamptons?

    ADU and home addition costs in the Hamptons reflect the premium construction standards and East End logistics required. A garage conversion to guest suite typically costs $80,000 to $200,000, while a new detached guest cottage or home addition can range from $200,000 to $600,000 or more depending on size and specification. Black Wall Builders provides a detailed quote after your free consultation.

    How long does it take to build a Hamptons ADU or home addition?

    Building an ADU or home addition in the Hamptons typically takes 8 to 18 months from initial consultation to certificate of occupancy, with a significant portion of that time in the local permitting process. Black Wall Builders recommends beginning planning well in advance — particularly for projects targeting completion before summer.

    Do Hamptons ADUs need local village or town approval?

    Yes. Most ADU and home addition projects in the Hamptons require approval from local village or town building departments — and in some cases zoning board of appeals approval as well. Black Wall Builders is experienced navigating these processes across East Hampton, Southampton, and other Hamptons municipalities and manages all approvals on your behalf.

    What areas of the Hamptons do you serve for ADU and home addition projects?

    Black Wall Builders serves all Hamptons communities for ADU and home addition projects — East Hampton, Southampton, Bridgehampton, Sagaponack, Westhampton, Montauk, Sag Harbor, Water Mill, North Haven, and all surrounding East End communities

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