Home Addition and ADU Contractor

Custom Home Additions and Accessory Dwelling Units for Homes Across Tigard, Portland, Lake Oswego, King City, and Nearby Communities

More Space, Better Function, and a Home That Fits the Way You Live

Expand Your Home With a Clear Plan

Your home should support the way you live today and the way your needs may grow over time. Whether you are planning a room addition, an accessory dwelling unit, a guest suite, a home office, or a more functional living area, TGR General Construction LLC helps homeowners expand their space with thoughtful planning and quality craftsmanship.

Based in Tigard, Oregon, TGR General Construction provides home addition and ADU construction services throughout the Portland metro area. Our team helps you move from idea to build with a clear scope, practical design guidance, permitting support, and steady communication throughout the project.

Schedule Your Addition or ADU Consultation
Before and after home renovation by TGR General Construction.

Home Additions and ADUs Designed Around Your Goals

A successful addition or ADU starts with understanding what the new space needs to do. Some homeowners want more room for family. Others want a private guest area, a rental opportunity, a flexible work-from-home space, or a separate living area for long-term household needs.

TGR General Construction helps homeowners think through layout, access, function, finishes, permitting, and how the new space connects to the existing home and property. The goal is to create an addition or ADU that feels useful, intentional, and well integrated.

Custom Room Additions

Add usable square footage to your home with a room addition designed around your lifestyle, layout, and long-term needs.

Accessory Dwelling Units

Create a private, functional living space that may support guests, family members, rental use, or flexible household needs.

Home Office Additions

Build a dedicated work-from-home space that feels separate, comfortable, and connected to the rest of your home.

Guest Suites

Add a private guest area with the layout, comfort, and finishes needed for visiting family or long-term household flexibility.

What We Can Help With

Expanded Living Areas

Create more room for gathering, relaxing, entertaining, or everyday use with a planned home expansion.

Basement Remodels

Transform underused basement space into a more functional area, such as a family room, guest suite, office, or entertainment space.

Project Planning and Permitting Support

Move through the planning process with help reviewing scope, layout, code considerations, and permitting requirements.

Contemporary tiny house with large glass windows and wooden exterior at dusk.

A Contractor Focused on Planning, Craftsmanship, and Clear Communication

Additions and ADUs are larger projects that require careful coordination. Layout, structure, access, utilities, permitting, materials, finishes, and connection points all need to work together.

TGR General Construction begins by learning what you want the new space to accomplish. From there, our team helps define the scope, review planning requirements, coordinate project details, and keep communication clear throughout the build.

TGR’s company information identifies additions and ADUs as part of the company’s service offerings, alongside decks, patio covers, kitchens, roofing, siding, bathrooms, and general remodeling.

Custom Room Additions

A room addition can give your home the extra space it needs without requiring you to leave a neighborhood or property you already enjoy. The right addition should feel connected to the existing home, both in how it functions and how it looks.

TGR General Construction helps homeowners plan room additions that may support family living, entertaining, work, hobbies, storage, or private guest space. Our team considers the existing layout, access, exterior connection, interior flow, finishes, and project scope so the finished addition feels like a natural part of the home.

Basement Remodels and Flexible Living Space

A basement remodel can help turn underused square footage into a more comfortable and functional part of the home. Depending on the space and project scope, a basement can become a family room, guest suite, home office, recreation area, entertainment space, or added living area.

TGR General Construction helps homeowners think through layout, lighting, insulation, moisture considerations, finishes, and how the basement should support daily life. When planned well, a basement remodel can feel like a natural extension of the home rather than a separate leftover space.

This section supports the broader living-space expansion focus of this page while keeping the primary entity centered on additions and ADUs.

Why Homeowners Trust TGR With Additions and ADUs

TGR General Construction LLC is a Tigard-based contractor serving homeowners throughout the greater Portland area. Our remodeling work is supported by local experience, professional credentials, and a steady commitment to clear communication and quality craftsmanship.

Additions and ADUs require coordination across planning, permitting, structural work, utilities, finishes, scheduling, and inspections. TGR helps homeowners move through that process with a clear scope and a project plan built around the property.

  • CCB #219625
  • BBB accredited
  • Insured and bonded
  • Founded in 2018
  • Home addition and ADU construction experience
  • General remodeling experience
  • GAF Installer Certified
  • James Hardie Certified
  • Trex Pro Certified
  • Best of Houzz Service 2025 and 2026
  • Google Guaranteed and Yelp Guaranteed
  • Local office in Tigard, Oregon

To learn more about our company, values, and team, visit our About TGR General Construction page.

What Homeowners Say

Homeowners consistently highlight our responsiveness, professionalism, and the care we take from setup through final cleanup.

Professional construction and renovation services by TGR General Construction.

Andrei C.

Working with TGR Construction has been an absolute pleasure from start to finish! The owner, Martin, runs the company with integrity and a clear passion for quality craftsmanship, while Shane, the project manager, made sure every detail was handled with precision and care.

From the first consultation to the final walkthrough, communication was excellent. Martin was upfront, honest, and transparent about costs and timelines — something that’s hard to find in this industry. Shane kept the project running smoothly, always checking in to make sure everything met expectations and often going the extra mile to make things perfect…

Meet the TGR Team

How Much Does an Addition or ADU Cost in Tigard, OR?

Addition and ADU pricing depends on the size of the project, type of space being built, structural requirements, utility needs, finish selections, site access, permitting requirements, and overall complexity.

Because every home expansion project is different, TGR General Construction provides project-specific proposals after reviewing the space, goals, and scope. TGR’s onboarding information notes that project pricing varies by material type, distance, size, and other project-specific factors.

Common cost factors include:

  • Project size and square footage
  • Room addition or ADU type
  • Foundation or structural requirements
  • Utility, plumbing, or electrical needs
  • Kitchen or bathroom components when included
  • Interior finishes
  • Exterior finishes
  • Site access and preparation
  • Permitting requirements
  • Connection to the existing home
  • Overall project complexity

A detailed proposal helps homeowners understand what is included, how the project is planned, and which factors shape the final investment.

Schedule a Addition evaluation and estimate

What to Expect During Your Addition or ADU Project

TGR General Construction keeps the process organized by starting with a clear understanding of your goals. We review the existing home or property, discuss the type of space you want to create, and help define the scope before moving forward.

From there, our team supports design planning, permitting preparation, scheduling, construction, and final walkthrough. Because additions and ADUs involve several moving parts, clear communication is an important part of the process from start to finish.

Initial consultation

Needs assessment and project goals

Permit review and site preparation

Construction and project coordination

Construction site of TGR General Construction with workers and equipment.

Final walkthrough and handoff

Request an estimate for an addition installation.

Schedule Your Addition or ADU Consultation
Contemporary tiny home with wooden exterior and large glass doors.
Beautiful landscape seen through large home windows during sunset.

Additions, ADUs, and Remodeling: Choosing the Right Project

Home additions, ADUs, and interior remodels can all make a home more useful, but they serve different needs.

A home addition expands the main living space. An ADU creates a more independent living area that may include its own sleeping, bathing, cooking, or living space, depending on the plan. A basement remodel increases the home’s existing square footage. A kitchen or bathroom remodel focuses on improving a specific interior space.

This page is focused on home additions, ADU construction, room additions, basement remodels, and expanded living space. For kitchen-specific projects, visit the kitchen remodeling page. For bathroom-specific projects, visit the bathroom remodeling page.

FAQs

TGR General Construction provides custom room additions, accessory dwelling units, expanded living areas, home office additions, guest suites, basement remodels, and living-space expansion services for homeowners in Tigard and the Portland metro area.

Yes. TGR General Construction can help homeowners plan and build accessory dwelling units based on the property, project goals, local requirements, approved scope, and permitting process.

An ADU may be used for guest space, family living, rental potential, private retreat space, or flexible household needs depending on the layout, local requirements, and project plan.

Yes. TGR General Construction builds custom room additions designed around the home, property, layout, and homeowner goals.

Yes. Basement remodels can be included as part of TGR’s living-space expansion services. A basement can be planned as a family room, guest suite, office, entertainment area, or other functional space depending on the home and scope.

Yes. TGR General Construction helps review permitting needs and project requirements as part of the planning process. Permit requirements depend on the project type, location, structure, utilities, and local jurisdiction.

Pricing depends on square footage, project type, structural requirements, utilities, finishes, site access, permitting, and overall complexity. TGR General Construction provides project-specific proposals after reviewing the scope.

Timelines vary based on design, permitting, project size, structural requirements, utility work, material selections, inspections, and overall scope. TGR General Construction provides a project-specific timeline once the plan has been reviewed and approved.

Yes. Depending on the approved scope, additions and ADUs may include kitchen, kitchenette, bathroom, laundry, or living space components. Kitchen-only and bathroom-only remodels are covered on separate dedicated service pages.

Yes. Additions and ADUs can be coordinated with broader remodeling work when included in the approved scope.

Local Addition and ADU Contractor Based in Tigard, OR

TGR General Construction provides home addition, ADU, and living-space expansion services for homeowners in Tigard, Portland, Lake Oswego, King City, Beaverton, West Linn, Tualatin, and nearby communities.

Our team focuses on projects for homeowners who want more usable space, thoughtful planning, quality craftsmanship, and a clear process from the first conversation to the final walkthrough.

Schedule Your Addition or ADU Consultation

Ready to Plan Your Addition or ADU?

A well-planned addition or ADU can give your home more flexibility, comfort, and long-term function. Whether you are planning a custom room addition, a private ADU, a basement remodel, or a larger living-space expansion, TGR General Construction can help you move forward with a clear plan.

Business information:
TGR General Construction LLC
14865 SW 74th Ave #210, Tigard, OR 97224
Hours: 7:00am–6:00pm
Phone: (503) 270-0195

Schedule Your Addition or ADU Consultation
Architectural blueprints and construction plans for building projects.