Custom Home Design and Architectural Review in the Treasure Valley

Dated: September 15 2026

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Design & ARBTreasure Valley, Idaho

Custom Home Design and Architectural Review in the Treasure Valley

The design phase is where your home is created — and where the most consequential decisions are made before anything is built.

DF
Dennis Fomin
Fomin & Company · Associate Broker, GRI, RSPS · 2026
Quick Answer

What does the custom home design process look like in the Treasure Valley?

A custom home design process moves through three phases: schematic design (overall floor plan, massing, and relationship of spaces — roughly 30% complete), design development (detailed plans, exterior elevations, material selections, structural approach — roughly 60% complete), and construction documents (full permit-ready drawings and specifications — 100% complete). The design process with a full-service architect runs 2-4 months and costs 5-8% of the construction value. In communities with Architectural Review Boards, your plans must also be approved by the ARB before or concurrent with the city permit process.

📞 Call or Text Dennis — 208-371-9099

Dennis Fomin — Founder, Fomin & Company. The design phase is where every decision is cheapest to make. Once construction starts, every change costs money and time. Invest in the design phase — make all decisions there, not in the field.

The Design Process — Phase by Phase

Schematic Design
Overall organization of spaces and floor plan flowAdjacency of rooms, relationship to site and views. Key decisions: master bedroom orientation, kitchen-to-family-room flow, office access. Change these at schematic — not at framing.
Design Development
Detailed plans and material selectionsFloor plans with dimensions, exterior elevations, preliminary structural approach, mechanical system locations. Window placement, roofline design, exterior material choices, and interior ceiling heights.
Construction Documents
Full permit-ready drawing setArchitectural sheets, structural engineering, HVAC, electrical, plumbing, energy compliance report, and specifications for every material and finish in the home. Goes to permit and forms the basis for builder pricing.
Specifications
Written document describing every material in the homeFraming grade, insulation R-values, roofing, siding, window specs, door hardware, plumbing fixture models, electrical fixture schedules, cabinet line, countertop material, flooring type and installation method. Eliminates allowances from the builder contract.
For why complete specifications eliminate allowances and budget risk: How to Budget for a Custom Home in Idaho: The Real Numbers and for the permit process that follows design completion: Idaho Custom Home Permitting: What to Expect in Ada and Canyon County.

Architectural Review Boards in the Treasure Valley

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What is an ARB?An Architectural Review Board reviews proposed construction plans against community CC&Rs and design standards. Many planned communities in Eagle, North Meridian, and some Boise neighborhoods require ARB approval before or concurrent with the city building permit.
📋
What ARBs reviewExterior materials and colors, roofline and massing, garage door design and orientation, fence materials and heights, landscaping timing requirements, and in some communities, square footage minimums. The CC&Rs define the specific ARB authority for each community.
⏱️
ARB timeline — typically 2 to 6 weeks per submissionARBs meet monthly or bi-monthly in most communities. A submission that misses the meeting date waits for the next cycle. Corrections — ARB requests changes to the exterior design — restart the cycle.
💡
Engage the ARB early — before final designReviewing the CC&Rs and ARB design standards before you finalize your design prevents the expensive scenario of redesigning an exterior to comply with ARB standards after design is complete.

Key Design Decisions That Are Expensive to Change After Construction Starts

🔴
Ceiling heightChanging a ceiling from 9 ft to 10 ft after framing starts requires re-framing walls — expensive and time-consuming. Decide ceiling heights at schematic design.
🔴
Window placement and sizeWindows are ordered early — lead times run 8-16 weeks. A window placement change after ordering triggers a re-order at full cost. Finalize window locations and sizes during design development.
🔴
Structural beam locationsMoving a load-bearing beam after framing is a structural engineering revision, a permit amendment, and a construction disruption. Decide the structural approach during design development.
🔴
Plumbing rough-in locationsToilet and shower drain locations are set in the concrete slab before framing. Changing a bathroom layout after the slab is poured requires saw-cutting concrete. Finalize all bathroom layouts before slab pour.

Frequently Asked Questions

Do I need an architect for a custom home in Idaho?+
Idaho does not always legally require a licensed architect for single-family residential permits, but complex custom homes benefit significantly from one. An architect coordinates all design disciplines, produces permit-quality documents, and reduces correction rounds during plan review.
How much does an architect cost for a custom home in Idaho?+
Full architectural services for a custom home typically run 5-8% of construction cost. On a $900K construction project, that is $45,000-$72,000. Some architects charge flat fees for residential work — confirm scope and fee structure before engaging.
What is an ARB in a residential community?+
An Architectural Review Board (ARB) enforces the community's CC&Rs related to exterior design, materials, and landscaping. ARB approval is a separate process from the city building permit and must be obtained before — or concurrent with — the permit in most communities that require it.
Can I design my own custom home without an architect?+
Legally possible in Idaho for single-family residential in some jurisdictions. Practically risky for a complex custom home — structural engineering, mechanical design, and permit-quality documents are technical requirements that require licensed professionals regardless of who does the architecture.
When should I finalize my floor plan and specifications?+
Before the permit application is submitted. Every change after permit submission requires a permit amendment — adding time and cost. The goal is to make all decisions during the design phase, not during construction.

Starting the Design Phase of Your Custom Home?

Dennis Fomin — Founder, Fomin & Company. Associate Broker, GRI, RSPS. Featured in the 2026 This Is Boise Area Guide.

  • —Architect referrals with Treasure Valley custom home experience
  • —ARB review guidance for communities in Eagle, North Meridian, and Boise
  • —Specification development support — eliminating allowances from your builder contract
  • —Dennis coordinates with design teams on custom home transactions regularly

Serving Boise, Meridian, Eagle, Nampa, Caldwell & the Treasure Valley.

Summary

The design phase is the cheapest and most consequential stage of your custom home. Every decision made on paper costs $0 to change. Every decision made in the field costs $5,000-$50,000 depending on what it requires structurally. Invest in the design phase, make all decisions before the permit application, and arrive at construction with a complete, specified, unambiguous set of plans.

The design phase is where your home is actually built. Construction is just execution. Get the design right and construction is a managed process — not a daily decision-making exercise.

Dennis FominFounder, Fomin & Company  ·  Associate Broker, GRI, RSPS  ·  Equity Northwest Real Estate
208-371-9099  · dennis@dennisfomin.com  · Meet Dennis →
903 N Main Street, Meridian, ID 83642
🏆 Featured in the 2026 This Is Boise Life in Idaho Area Guide

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