General Contractor in Los Angeles &
Greater Philadelpia
GMP, Lump Sum, Cost-Plus, Design-Build & CMAR Delivery
Construction Services (LA + Greater Philadelphia)
TriStone Group is a partner-led builder for owners, developers, and multi-site brands delivering projects in Los Angeles and Greater Philadelphia. We run General Contracting as the core service backed by Pre-Construction and Owner’s Representation so you can lock scope early, keep decisions moving, and protect your opening date, budget, and schedule.
We provide construction services designed for schedule certainty, cost control, and execution clarity— specially when you have a real move-in date and multiple stakeholders. Our work includes retail tenant improvements, restaurant build-outs, multifamily, select luxury residential, and public projects across Los Angeles and Greater Philadelphia.
If you’re comparing delivery methods, we support GMP, lump sum / stipulated sum, cost-plus, design-build, and CMAR (Construction Manager at Risk) and we’ll recommend the best fit based on scope definition, risk, and speed to market]
Field leadership, subcontractor coordination, procurement, schedule control, QA/QC, safety, and closeout delivered with disciplined project controls and clear reporting.
Feasibility, concept-to-GMP estimating, schedule modeling, value engineering, constructability review, and permitting coordination so your plan is buildable before you mobilize.
Owner-side oversight to protect scope, budget, and schedule keeping vendors, consultants, approvals, and project decisions aligned so momentum doesn’t stall.
General Contracting (Primary)
We serve as the lead General Contractor for construction projects where execution discipline and trade coordination determine outcomes. From mobilization to turnover, we protect schedule, quality, safety, and change control so the project stays predictable, even when conditions aren’t.
What we handle
- Partner-led field leadership and jobsite management
- Subcontractor buyout, trade coordination, sequencing, and site logistics
- Master schedule creation, weekly look-aheads, and schedule recovery
- QA/QC, safety programs, inspections, and turnover + closeout
- RFI/submittal flow, change management, and documented approvals
How we reduce risk
- Bid leveling + scope coverage to prevent missed scope and late change orders
- Early constructability reviews to avoid downstream rework
- Transparent reporting that makes decisions fast (and keeps accountability clear)
Common delivery types:
Retail tenant improvements, restaurant build-outs, multifamily work, and select public projects delivered under GMP, lump sum / stipulated sum, cost-plus, design-build, or CMAR structures (based on scope clarity and risk tolerance).
Owner’s Representation (Supporting)
Owner’s Representation gives you an experienced owner-side advocate to keep scope, budget, and schedule aligned especially when vendors, approvals, consultants, or internal stakeholders can slow decisions or introduce scope drift.
Where it fits
- Multi-stakeholder projects (owner, architect, consultants, vendors)
- Projects with real opening dates and schedule sensitivity
- Owners managing multiple locations or concurrent workstreams
- RFI/submittal flow, change management, and documented approvals
What we do
- Align scope, budget, and schedule across the full team
- Run disciplined change control: review, documentation, and approvals
- Provide progress reporting that supports fast, confident decisions
- Maintain a risk log before issues become delays or cost exposure
Pre-Construction (Supporting)
Pre-Construction is how we make projects buildable before construction begins. The goal is simple: reduce uncertainty early so the build phase is predictable, pricing is defensible, and the schedule is real.
What’s included
- Feasibility + early planning support (site constraints, long-lead risk, phasing)
- Budget and schedule modeling from concept through GMP
- Value engineering + scope optimization (without breaking operations or quality)
- Constructability review and risk identification
- Permitting coordination + bid strategy support (including scope coverage)
Why this matters:
Projects blow up when bids are rushed, scope is incomplete, and constraints are discovered in the field. Pre-Construction reduces downstream change orders and schedule slips by forcing the right decisions early—before you’re paying for them later.
Fit matters: here’s how to tell quickly.
Best fit:
Owners, developers, and brands with real opening dates
Projects where visibility and decision speed reduce risk
Teams who value disciplined controls over guesswork
Not a fit:
Price-only bid shopping
Undefined scope
Small handyman-scale work
Partner-led field leadership, trade coordination, inspections, safety, and closeout run with disciplined project controls to protect schedule and budget.
Preconstruction includes early budget validation, schedule planning, procurement lead-time planning, scope alignment, and bid strategy. The goal is to surface gaps early—before the schedule hardens and late changes become expensive.
General Contracting is typically a defined scope executed under a contracted price structure, while CM/CMAR is often used when scope, schedule, and procurement require tighter coordination and earlier involvement. We’ll advise the right approach based on document completeness and timeline pressure.
Yes Owner’s Rep support is available when owners or developers need a single point of accountability across architect, consultants, vendors, and the GC team. It’s ideal for multi-stakeholder projects where decision speed reduces risk.
Yes. We deliver restaurant build-outs and retail fit-outs in Los Angeles and surrounding areas, especially when there’s a real opening date and tight coordination requirements.
Yes. We support multifamily work in Greater Philadelphia with a planning-first approach that aligns scope, procurement, and schedule before field execution begins.
Yes. We plan permitting requirements and review timelines during preconstruction so plan-check doesn’t derail the schedule. In Los Angeles County, building permits can be the toughest path item, so we plan for it explicitly.
It means owners get clearer visibility into schedule status, progress documentation, decisions, and budget tracking through modern workflows without relying on scattered email threads. We emphasize the outcome (visibility + speed), through AI.