AEC Outsourcing Team Built for Residential Contractors
CAD Drafting Service
Code-compliant MEP Permit Package that clear plan review. MEP & FF Design & Drafting Service for Residential Contractors, Home Builders and Design Build Firms who want to scale their business.
- Flat Rate Pricing
- Quick Revisions till Approval
- 93% Permit Approval Rate
- RFI Support
Extension of Your Team
Your standards · your workflow
CAD Drafting Drawings
Clean · Coordinated · Code-Compliant
Trusted by 30+ Residential Contractors, Home Builders & Design-Build Firms Across the USA
Fully Coordinated MEP & FF Permit Package in 5 Business Days.
ZMES Global delivers complete, MEP & FF Permit Drawing packages covering HVAC Load Calculations, Electrical Service Load Calcs, Fixture Unit Calcs, Plans & Schedules Our production MEP Engineer design as per ACCA, ASHRAE, NEC, IMC, IPC, IECC and state-specific amendments. You receive a fully coordinated MEP Permit document set formatted for your local building department,city hall or county delivered in AutoCAD, Revit, or PDF. Every Structural Permit Package passes through a code compliance review before delivery. You submit with confidence. Your project breaks ground on schedule.
Related Services
Architecture Design & Drafting
Structure Design & Drafting
Energy Compliance Reports
Your Dedicated MEP Engineers. Built in.
ZMES Global provides Code-compliant MEP Permit Package for residential contractors, home builders, and design-build companies with a team of production architects and engineers who take complete responsibility for the Pre-construction phase of your project.
You stay focused on site operations, client relationships, and construction timelines. ZMES Global produces every drawing, executes every code review, and delivers every submittal package your building department requires.
Full permit phase ownership:
ZMES Global's production Structural Engineers produce, QC-review, and deliver code-compliant Structural drawing packages calibrated to your jurisdiction. You submit to the building department with confidence.
In-house MEP engineers:
Every permit set is designed by experienced production MEP engineers. ZMES Global's in-house team carries direct technical responsibility for every document delivered, not outsourced drafts.
Faster permit approval cycles:
Fully coordinated structural documentation eliminates the back-and-forth that stalls building department reviews and pushes your groundbreaking date back.
Consistent quality across every county and state:
Whether your builds sit in one county or span multiple states, every drawing package clears the same structured QC review. No rework. No resubmittals from documentation errors.
Four Core Services, Built for Residential Builders
Mechanical/HVAC
Right-Sized Systems That Pass Load Calculation Review
We deliver a complete HVAC System Design Package for residential construction. Every HVAC set begins with an ACCA Manual J residential load calculation that accounts for specific climate zone, envelope assembly, infiltration rate, and internal gains. Equipment selection follows Manual S, and duct system design follows Manual D, ensuring your system is code-compliant and right-sized, not oversized as a shortcut.
What We Design
Residential HVAC Systems:
- Single-family homes with forced-air, radiant, or zoned split systems
- ADUs and JADUs with ductless mini-split and heat pump systems
- Townhouses and duplexes with individual unit HVAC design
- Multifamily buildings with central or per-unit VRF systems
- Home additions/remodels requiring load recalculation on existing equipment
Specialty Mechanical Applications:
- High-performance and net-zero homes requiring heat pump design and ERV integration
- Homes in CA Title 24 all-electric compliance zones
- Coastal and high-humidity climates requiring dehumidification load analysis
- Homes with conditioned crawlspaces, sealed attics, or unvented assemblies
- Radiant floor heating systems coordinated with structural floor assemblies
Deliverables Include
- ACCA Manual J load calculation report
- ACCA Manual S equipment selection report
- ACCA Manual D duct system design and layout
- Equipment schedule (model, capacity, SEER2 / HSPF2 / AFUE)
- Central air and forced-air system layouts
- Heat pump and ductless mini-split system Layouts
- VRF system design for multifamily buildings
- Ventilation calculation per ASHRAE 62.2
- Kitchen, bath, and laundry exhaust fan schedule
- Fuel-gas piping sizing and isometric layout
- Smoke control coordination for multifamily occupancies
- Title 24 Part 6 HERS-required measures and CF1R form (CA)
- Florida Energy Code compliance per FBC-Energy 8th Edition (FL)
- RESCheck or IECC energy compliance report (all other states)
Code Compliance
Electrical & Low Voltage
Code-First Residential Electrical System Design
We produce complete residential electrical permit sets per the NEC edition adopted by your AHJ. Every set covers service load calculations per NEC Article 220, single-line diagrams, panel schedules, branch-circuit and lighting plans, GFCI and AFCI protection layouts per NEC 210.8 and 210.12, and low-voltage structured wiring per ANSI/TIA-570-E. We confirm your state’s adopted NEC edition at scoping so the drawings reflect the correct code year before a single line is drawn.
What We Design
Residential Power & Lighting Systems
- Single-family homes, custom builds, and production builder plan sets
- ADUs, JADUs, and garage conversions with new service or sub-panel design
- Townhouses and duplexes with individual unit metering and panel schedules
- Multifamily buildings (R-2) with house panel, unit panels, and common-area circuits
- Home additions and remodels with load impact analysis on existing service
Specialty Electrical Applications
- EV-ready and EV-capable installations per CALGreen and IECC §R404
- Solar PV systems and battery energy storage coordination
- Whole-home generator and automatic transfer switch provisions
- Smart-home pre-wire layouts for lighting control, security, and AV distribution
- Low-voltage structured wiring per ANSI/TIA-570-E Grade 1, 2, and 3 for data, voice, video, and security
Deliverables Include
- NEC Article 220 service load calculation
- Single-line diagram from service entrance to all panels
- Main and sub-panel schedules
- Branch-circuit layout plan
- GFCI protection layout per NEC 210.8
- AFCI protection layout per NEC 210.12
- Interior and exterior lighting plan
- Title 24 CF1R lighting compliance form (CA)
- Smoke detector and CO detector layout per IRC R314 and R315
- EV-ready conduit and panel provisions per CALGreen and IECC §R404
- Solar PV array and battery ESS coordination
- Generator and transfer switch provisions
- Low-voltage structured wiring plans per ANSI/TIA-570-E Grade 1, 2, or 3
- Security, data, audio-visual, and smart-home pre-wire layout
Code Compliance
Plumbing Systems
Water Supply, Drainage, Venting, and Gas Piping, Sized per Your Adopted Code and Drawn for Permit Approval
Our plumbing permit sets cover domestic water supply, DWV (drain, waste, and vent) systems, gas piping, and water heating for every residential project type. We design per the code adopted in your jurisdiction, whether that is the Uniform Plumbing Code or the International Plumbing Code, and size every supply branch, drainage fixture unit, and vent stack using the correct method for that code. DWV isometric drawings, riser diagrams, and gas piping layouts are included in every set.
What We Design
Residential Power & Lighting Systems
- Single-family homes with complete water supply and DWV design
- ADUs and JADUs with new water service or shared connection analysis
- Townhouses and duplexes with individual unit metering and separate DWV stacks
- Multifamily buildings with shared riser systems and per-unit fixture connections
- Home additions and kitchen or bathroom remodels with load impact on existing supply and drain lines
Specialty Electrical Applications
- Heat pump water heater and tankless water heater systems with recirculation loops
- Homes in CALGreen Tier 1 and Tier 2 water-conservation compliance zones
- Coastal and flood-zone homes with backflow prevention and elevated fixture requirements
- Gas piping systems for homes with mixed fuel appliances in non-all-electric jurisdictions
- Grease interceptor design for ADUs and multifamily units with full kitchens
Deliverables Include
- Domestic water supply sizing per UPC §610 or IPC §604 fixture-unit method
- Cold and hot water riser diagram
- DWV isometric drawing (drain, waste, and vent)
- Sanitary drainage layout and pipe sizing
- Vent stack design and roof penetration schedule
- Gas piping sizing and isometric diagram per IFGC
- Water heater sizing (tank, tankless, or heat pump water heater)
- Hot water recirculation loop design
- Backflow preventer and cross-connection schedule
- Fixture schedule with flow rates and WaterSense compliance
- CALGreen low-flow fixture compliance (CA)
- Grease interceptor sizing for ADUs and units with full kitchens
- Condensate drain design per FBC-Plumbing §314.2.1.1 (FL)
- Irrigation and hose-bib stub-out coordination
Code Compliance
Residential Fire Protection
NFPA 13D and 13R Residential Sprinkler Design, Including Full Hydraulic Calculations
ZMES Global designs residential fire sprinkler systems in-house, NFPA 13D covers single-family dwellings, duplexes, and townhouses. NFPA 13R covers low-rise multifamily buildings up to four stories above grade. Every layout includes a full hydraulic calculation sized against the minimum water supply available at the site, the document most AHJ plan reviewers require before they will approve a fire protection submittal.
What We Design
Residential Fire Sprinkler Systems
- Single-family homes in California and other mandatory-sprinkler jurisdictions per NFPA 13D
- Townhouses requiring individual unit sprinkler systems per IRC R313 and NFPA 13D
- Duplexes and two-family dwellings with shared or separate sprinkler supplies
- Low-rise multifamily buildings up to four stories per NFPA 13R
- Multipurpose systems sharing the domestic water supply per IRC P2904
Specialty Fire Protection Applications
- ADUs in California with CRC R313 sprinkler requirement analysis and exception documentation
- Homes in high-pressure or low-pressure municipal supply zones requiring hydraulic analysis
- Projects where fire pump design is required due to insufficient street pressure
- Miami-Dade and HVHZ residential projects with corrosion-resistant sprinkler head specifications
- Homes requiring NFPA 13 full-coverage systems due to mixed-use or IBC occupancy classification
Deliverables Include
- NFPA 13D system layout for SFD, duplexes, and townhouses
- NFPA 13R system layout for multifamily R-2 occupancies up to four stories
- Full hydraulic calculation report
- Water demand vs. supply analysis
- Multipurpose system design per IRC §P2904 (shared domestic and sprinkler supply)
- Sprinkler head schedule with coverage area and K-factor
- Fire department connection details for NFPA 13R and NFPA 13 systems
- Fire pump sizing where municipal supply pressure is insufficient
- CRC R313 compliance analysis for all California projects
- ADU sprinkler exception analysis per Government Code §65852.2 (CA)
- Smoke control coordination for multifamily occupancies
- AHJ-specific submittal notes, cover sheet, and design basis narrative
Case Study
Our 6 Step Structural Permit Package Production
Every project follows the same predictable workflow. Each step has a defined deliverable and timeline, which keeps your project on rails from the first email to the final sealed PDF:
Every project follows the same predictable workflow. Each step has a defined deliverable and timeline, which keeps your project on rails from the first email to the final sealed PDF:
01
Free Drawing Review
Send your architectural plans in DWG or Revit format. We review project type, occupancy, AHJ jurisdiction, and applicable code editions across all four disciplines. We confirm scope, identify code triggers, and flag any items needing clarification before pricing.
02
Fixed-Fee Proposal
Within one business day you receive a written proposal with scope, deliverables by discipline, fee, and turnaround timeline. No hourly billing. No change orders on locked scope. Fire protection, energy compliance, and low-voltage plans are included, not added later.
03
Engineering & Drafting
Calculations drive the drawings, not the reverse. Mechanical runs Manual J, S, and D. Electrical runs the NEC 220 service load. Plumbing runs fixture-unit sizing per the adopted UPC or IPC. Fire protection runs the hydraulic calculation against available site water supply.
04
Drafting & Discipline Coordination
Our drafters produce all four discipline sets coordinated to your architectural base plan. Equipment locations, duct routing, panel placement, plumbing chases, and sprinkler head positions are cross-checked across every discipline. Conflicts are resolved internally, not at plan check.
05
Internal QA/QC & Energy Compliance
A second engineer reviews the complete package against the AHJ submittal checklist. Code references, load documentation, equipment schedules, and detail callouts are verified. Energy compliance forms — CF1R for CA, FBC-Energy forms for FL, RESCheck for all other states — are prepared and attached before release.
06
Delivery & Plan Check Support
You receive a PDF permit set with calculations, energy compliance reports, and equipment schedules, ready for AHJ submission. CAD or Revit files available on request. Correction responses and revisions within original scope are included at no extra cost. Most projects permit on the first or second pass.
What You Receive in a MEP & FF Permit Package
A common reason residential MEP permits stall is incomplete or uncoordinated submittals. Reviewers reject sheets that lack load calculations, reference the wrong code edition, or contradict equipment shown on the architectural set. Our standard deliverable closes those gaps before the package leaves our office.
01
Drawings
- Cover sheet with code summary and design criteria
- Mechanical floor plan with equipment and duct layout
- Electrical floor plan with branch circuits and lighting layout
- Single-line electrical diagram with panel locations
- Plumbing floor plan with water supply and DWV layout
- Fire sprinkler floor plan with head locations and coverage areas
- Site utility connection diagram where required by AHJ
02
Schedules
- Mechanical equipment schedule
- Electrical panel schedule
- Plumbing fixture schedule with flow rates
- Sprinkler head schedule with K-factor and coverage area
- Exhaust fan and ventilation schedule
- Water heater and recirculation schedule
03
Calculations & Notes
- ACCA Manual J heating and cooling load calculation
- ACCA Manual S equipment selection and Manual D duct sizing
- NEC Article 220 electrical service load calculation
- Plumbing fixture-unit calculation per adopted UPC or IPC
- Fire sprinkler hydraulic calculation per NFPA 13D or 13R
- Energy compliance report
- General MEP notes and code references
Certifications & Accreditations
Showcasing the certifications and accreditations that reflect our expertise, quality, and commitment to industry standards.
AutoDesk
DBIA
ABC
BIM
Softwares We Use
We leverage industry-leading software to ensure precision, efficiency, and seamless project delivery.
Built specifically for Contractors, Home Builders & Design Build Studios. Different by design.
ZMES Global delivers the expertise, reliability, and efficiency of an in-house team at a fraction of the cost. Discover how our MEP & FF System Design & Drafting services can transform your Business.
Get Back on the Job Site. We Have Got the Drawings.
You did not start your construction business to spend nights drafting permit sets in Chief Architect. Hiring a full-time CAD technician costs $70,000 per year plus benefits, software licenses, and a workstation. Local Engineers are overbooked and overpriced. Freelance platforms deliver inconsistent quality that fails plan checks.
Every week without approved permits costs you carrying charges, delayed revenue, and a client who starts calling other builders. According to NAHB data, labor shortages alone cost the residential construction industry $10.8 billion annually in delayed production. Your permit drawings should not add to that number.
Send us your project scope: a sketch, a PDF markup, or even a phone photo of a napkin drawing. ZMES Global will return a flat-rate quote within 24 hours and deliver permit-ready drawings in 5 business days.
- Flat Rate Pricing
- 5-day turnaround
- Unlimited revisions until approval
Productized Pricing Section
Simple, Transparent & Fixed Pricing for County Permit Drawings
No hourly billing - No revision surcharges - Unlimited Revision Till Approval
Payment methods we accept
Questions we hear from every firm.
Do your drawings come with a licensed PE stamp?
Most residential projects (one- and two-family dwellings, typically three stories or fewer) fall under state-specific architectural licensing exemptions and do not require a licensed Engineer stamp for permit submission. ZMES can advise on whether your specific project requires a stamp based on your state's threshold. For projects that require stamped drawings, ZMES partners with U.S.-licensed engineers who can review and seal the documents.