MNBE Construction & Development

MNBE Construction & Development is a design-build general contractor founded and led by Aharon Ben Elisha, a working builder who has been designing and building custom residences throughout the Pacific Northwest since 2006. Based in Seattle's Ballard neighborhood at 2014 Fairview Ave, MNBE holds a Washington contractor license (MNBECCD770R9) and operates across King, Snohomish, and Pierce counties, serving Seattle neighborhoods including Magnolia, Queen Anne, Ballard, Capitol Hill, and West Seattle, as well as Eastside communities like Bellevue, Kirkland, Redmond, Mercer Island, Sammamish, and Issaquah. The firm has built a reputation for comprehensive custom home work and specialized expertise in accessory dwelling units, handling projects from initial site feasibility all the way through keys in hand.

The company's ADU and DADU services span the full spectrum of site-built construction: detached backyard cottages, attached ADUs joined to existing homes, basement conversions, and garage conversions. MNBE bundles architectural drawings, structural engineering, zoning and permitting support, and full construction under a single fixed-price contract, which differentiates their model from firms that piece together work across multiple vendors. This integrated approach means a homeowner navigates zoning complexity with the same team that will build the unit and pull the final permit, reducing handoff risk and the coordination friction that often derails DIY projects or multi-firm efforts. The work scales from smaller infill projects on tight urban lots to more elaborate multi-story DADUs on properties with space to spare, and MNBE specifically highlights their experience navigating Washington's expanded ADU rules under HB 1337, which opened new construction rights in urban areas.

The process MNBE follows is straightforward and transparent. After an initial free site visit where the team assesses lot conditions, zoning constraints, utility access, slope, soils, and the homeowner's goals, the firm prepares architectural drawings and a written fixed-price bid. This feasibility and design phase is critical because ADU costs vary widely based on site conditions rather than generic per-square-foot rates: a lot with poor soils or challenging access costs more to build on than a level, serviced lot, and MNBE's role is to unpack those variables before design work begins. Once the homeowner approves the bid, MNBE handles all permit preparation and plan-check corrections, then executes construction with the firm's licensed crew under Aharon's direct supervision. The final step is the certificate of occupancy and keys.

What stands out about MNBE's approach is their emphasis on fixed-price contracting and their willingness to tackle the full complexity of ADU projects on their own. Many builders subcontract major work or charge per square foot, which can obscure cost variables and create disputes when site conditions turn out to be worse than estimated. MNBE's model of a single bid for a complete project, including design and permits, appeals to homeowners who want clarity and accountability. The firm's website includes real examples of the types of units they build, from a 700-square-foot detached DADU to basement conversions and garage modifications, which gives prospective clients a sense of their actual output rather than abstract capabilities. Customer reviews on Yelp and BBB average 4.7 to 4.8 stars from dozens of verified projects, with repeated praise for Aharon's responsiveness, professionalism, and construction quality.

One of the key advantages of working with MNBE is their experience with Washington's expanded ADU regulations. When HB 1337 opened new construction rights for accessory dwelling units in urban Seattle, many homeowners and builders were uncertain about what was actually allowed. MNBE's team has navigated these changes directly through dozens of projects and understands the nuances of how the regulations apply to specific neighborhoods and lot configurations. This matters because zoning rules are granular: a property in one Seattle neighborhood might allow a detached DADU under certain setback and size restrictions, while the same configuration could be prohibited a few blocks away due to different zoning classifications or overlay districts. MNBE's local expertise helps homeowners understand what is actually permittable on their specific lot, avoiding years of trial and error or expensive design work on projects that won't gain approval.

The firm also brings continuity across the entire project lifecycle. Aharon Ben Elisha's direct involvement in every project, from the initial site visit through final inspection, is unusual in a market where many general contractors use foremen and project managers as intermediaries. Homeowners who speak with Aharon at the outset know they will see him again during construction, which creates accountability and personal investment in the outcome. This hands-on model works particularly well for homeowners who are navigating ADU construction for the first time and value being able to ask questions and get direct answers from someone with two decades of building experience. For projects on difficult sites or with unusual constraints, having a designer-builder deeply familiar with both the zoning and the construction execution makes a meaningful difference in the final product.

On pricing, MNBE does not publish a standard rate card; costs are quote-only after the site visit and feasibility work. This is standard in the ADU market because actual costs depend heavily on existing conditions like electrical service capacity, water line sizing, septic vs. sewer, tree removal, foundation requirements, and finish level. The firm does emphasize that their fixed-price model eliminates surprises once the bid is approved, which appeals to homeowners who want to know the total cost before breaking ground. They serve clients across the income spectrum, from modest backyard rental units to higher-end custom cottages, and the variety in their portfolio suggests flexibility around budget and scope.

The firm's phone number is (206) 637-0044, and their website at mnbe-wa.com includes a contact form for scheduling the free initial site visit. MNBE typically responds within a few days and is willing to work with homeowners who are still in the early stages of exploring whether an ADU makes sense for their property. The free site visit is genuinely risk-free: the firm assesses feasibility and provides preliminary feedback without obligation, and only moves to the design and estimation phase if the homeowner wishes to proceed.

MNBE competes directly with other site-built ADU builders in the Seattle market by offering an unusually integrated service from feasibility through final inspection. Where some firms focus purely on design or construction, and others specialize only in certain unit types, MNBE's willingness to do the full project from start to finish, with one team and one contract, simplifies the homeowner's job significantly. The firm's longevity and licensing across three counties also means they have deep familiarity with local zoning codes, permitting timelines, and the specific constraints of neighborhoods like Ballard, Wallingford, and West Seattle, which changes frequently. For homeowners in the Seattle metro who want a single point of accountability and the confidence that comes with a designer-builder who has been doing this work for nearly two decades, MNBE is a natural first call.

This is the right builder for homeowners on a defined budget who want clarity from start to finish, who have lots with complicated site conditions and need expert guidance on what is actually buildable, and who value having one team managing design, permits, and construction. The firm's emphasis on fixed-price work and full in-house delivery, combined with Aharon's hands-on involvement and deep local knowledge, makes MNBE particularly strong for custom projects in the Seattle neighborhoods where ADU zoning has opened up in recent years.