Mercer Island Custom Home Builder
Infinity Construction GC LLC provides custom home building services for homeowners planning ground-up residential construction on Mercer Island, Washington. As a Mercer Island custom home builder, we specialize in structurally sound, code-compliant homes built for environments where shoreline regulations, lot constraints, and inspection discipline directly affect project success.
We build custom homes throughout Mercer Island, working with homeowners, architects, and design teams who need a builder capable of managing structure, sequencing, and long-term performance—not just design finishes.
Our Custom Home Building Services
Full Custom Home Construction
Complete management and execution of custom home projects, including coordination of trades, scheduling, inspections, and quality control.
Pre-Construction & Planning Support
We assist with early-stage planning to reduce risk later in the build. Plan and scope review, Constructability input, Timeline and sequencing alignment & Permit-readiness preparation.
Structural Execution & Oversight
We manage framing, structural systems, and build sequencing with inspection requirements in mind from day one.
Trade Coordination & Scheduling
We coordinate trades to maintain progress, reduce delays, and prevent rework.
Inspection & Code Compliance Management
Mercer Island inspections are strict and detail-driven. We build to pass—without last-minute corrections.
Why Homeowners Choose Infinity Construction GC LLC
-
Structural Expertise
We come from structural construction. That experience directly impacts build quality, accuracy, and long-term performance. -
Code-Aware Execution
Mercer Island and Washington State codes are not optional. We build to meet them consistently and correctly. -
Hands-On Oversight
Your project is overseen by professionals who understand construction details—not passed down a chain of project managers. -
Clear Communication
Accurate estimates, realistic timelines, and direct answers throughout the build. -
Local Accountability
We work throughout the Eastside and South Puget Sound. Our reputation depends on long-term performance, not short-term wins.
What We Build
Custom Residential Construction
We build one-of-a-kind homes tailored to the site, plans, and long-term goals of the homeowner—not production templates or standardized layouts.
- Ground-up custom home construction
- High-end residential builds
- Architect-designed homes
- Site-specific structural solutions
Structural-First Home Building
Our background in framing and structural construction informs every phase of the build—especially on constrained Mercer Island sites.
- Foundations and structural systems
- Load-bearing assemblies and framing
- Complex roof systems and layouts
- Long-term durability and code compliance
Additions & Major Rebuilds
For properties requiring teardown, shoreline compliance updates, or structural expansion.
- Major home additions
- Structural rebuilds
- Load-bearing modifications
- Integration with existing structures
Our Custom Home Building Process
01
Plan & Feasibility Review
We review architectural plans, site conditions, and structural requirements to identify complexity early.
02
Pre-Construction Coordination
Permitting strategy, sequencing, and scheduling are aligned before construction begins.
03
Structural Construction
Foundations, framing, and load-bearing systems are executed with precision and code compliance.
04
Build-Out & Trade Coordination
We manage trades, inspections, and quality control through each phase of construction.
05
Final Inspections & Completion
We complete the project with inspection approval, documentation, and clean turnover.
Request a Custom Home Building Consultation
If you’re planning a custom home on Mercer Island and need a builder who understands structure, shoreline regulations, permits, and inspections,not just design – Infinity Construction GC LLC is ready to help.
We work with homeowners who value accuracy, accountability, and long-term performance.
Request a consultation today to discuss your custom home project.
Permitting, Shoreline & Zoning Constraints on Mercer Island
Building a custom home on Mercer Island is governed by one of the most restrictive residential regulatory environments in King County. Understanding how these systems interact is critical to avoiding delays, redesigns, and inspection failures.
Infinity Construction GC LLC builds with direct awareness of the agencies and regulations that control residential construction on Mercer Island, including:
City of Mercer Island Development Services
This department oversees zoning, permitting, plan review, inspections, and environmental compliance for residential construction. Custom homes on Mercer Island commonly involve:
- Zoning and land-use compliance
- Structural and seismic review
- Stormwater and drainage approval
- Shoreline and critical area review
- Energy code compliance
Projects near Lake Washington often require additional shoreline permitting and environmental review, increasing timeline sensitivity.
Shoreline, Access & Seismic Reality on Mercer Island
Mercer Island presents a combination of tight lots, limited access, shoreline proximity, and seismic requirements, layered with prolonged seasonal moisture exposure.
As a result, custom homes must be built with:
- Precise load-path and foundation design
- Enhanced shear wall and bracing continuity
- Moisture-resistant detailing during construction
- Careful staging and sequencing on narrow sites
- Inspection-ready framing and fastening visibility
These requirements are routinely enforced and leave little room for correction after the fact.
Why This Matters to Homeowners
Custom home projects on Mercer Island most often fail due to:
- Underestimating shoreline or critical-area review
- Site access and staging complications
- Structural revisions triggered after framing
- Moisture issues introduced during poor sequencing
Infinity Construction GC LLC plans and builds with these constraints addressed before construction begins, reducing delays, redesigns, and costly mid-project corrections.
Custom Home Builder for Mercer Island Neighborhoods
Infinity Construction GC LLC works on custom home projects throughout Mercer Island, including neighborhoods where lot size, slope, and shoreline proximity vary significantly.
We regularly build in areas such as:
- North End
- South End
- First Hill
- East Seattle Shoreline
- West Seattle Shoreline
Each area presents different challenges related to access, setbacks, utilities, and permitting. Our experience building within Mercer Island’s residential zones allows us to plan and execute accordingly—without surprises mid-build.
Get a Free Estimate
Whether you’re starting a new build or need structural framing support, Infinity Construction GC LLC delivers results that hold up.
Mercer Island combines tight zoning with aggressive environmental oversight. Steep slopes, critical areas, tree retention, and lake-related constraints are common, and the city enforces them rigorously. Lots are smaller, access is limited, and design expectations are high. If your team isn’t coordinating land use, civil, structural, and architectural decisions from the start, Mercer Island will force that coordination later — painfully.
Before land use and design review, full stop. Mercer Island frequently pushes back on plans that maximize size without fully resolving grading, access, and tree protection. A builder involved early can identify where the design will trigger objections or constructability issues and adjust before the city does. Once review starts, changes become slower, more visible, and more expensive.
Design overreach. Projects stall when ambitious designs collide with slope limits, tree retention rules, or access constraints that weren’t realistically evaluated upfront. When revisions are required mid-review, they often cascade across multiple disciplines. The projects that move forward are led by teams who design within real constraints — not theoretical allowances.