What Castle Building & Remodeling does

Castle Building & Remodeling is a privately held, design-build residential remodeling firm founded in 1977 and headquartered in Minneapolis, Minnesota. The company serves homeowners in the Minneapolis-St. Paul (Twin Cities) metro, with a particular specialization in older urban homes including Craftsman, Victorian, Tudor, and Mid-Century Modern properties. Its core offering is a unified design-build model that pairs in-house licensed architectural design with an employed production crew of carpenters, drywallers, and tilers, governed by a documented 13-stage process with guaranteed upfront pricing and completion dates. Revenue is project-based, with publicly disclosed unit pricing (e.g., bathroom gut-to-studs at $50,857-$58,485 plus a separate ~$1,700 design fee) and average project sizes scaling into the six figures for kitchens, additions, and whole-house renovations.

The service catalog spans kitchens, bathrooms, basements, whole-house renovations, additions and second stories, attics, porches and decks, exteriors, accessory dwelling units (ADUs), and a Special Projects Team for smaller repairs. Distribution is sales-led: free in-home consultations, online appointment booking, and a content-marketing funnel anchored on a project portfolio organized by room type and architectural style, a remodeling blog, and a free 2026 cost guide. Customers are individual residential homeowners; the firm holds an EPA Lead-Safe certification, Minnesota building contractor license BC005657, and $2M general liability coverage through Federated Insurance, and maintains supplier relationships with local Minnesota vendors (Sauk Centre cabinets, Cambria/LeSeur countertops, Clay Squared tile, Warners' Stellian appliances). Leadership is founder-led by Owner/Business Manager Loren Schirber, with CFO Tambra Lee Heine and a team of project managers, designers, and production staff; no external funding rounds or parent company are disclosed.

Name

Castle Building & Remodeling

Legal name

Castle Building & Remodeling, Inc.

Website

https://castlebri.com

Company type

Private

Founded year

1977

Operating status

Operating

Headcount range

11–50 employees

Short description

Castle Building & Remodeling is a Minneapolis-based, design-build residential remodeling firm serving homeowners in the Minneapolis-St. Paul metro, specializing in older urban homes and offering kitchens, bathrooms, additions, whole-house renovations, and specialty projects through a 13-stage process with guaranteed upfront pricing.

Ownership category

akta.pro rank

Product category

Residential Home Remodeling

NAICS

Residential Remodelers (236118)

SIC

General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

Architectural Reconfiguration & Structural Alterations (HSAPAEAB)

Keywords

• Residential home remodeling
• Design-build services
• Kitchen remodeling
• Bathroom renovation
• Home additions

Headquarters

HQ city

Minneapolis

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales

Revenue model

1. Residential Remodeling Services: Project-based fees for home remodeling services including kitchens, bathrooms, basements, additions, whole house renovations, attics, porches, decks, and exterior work. Pricing varies by project scope with typical bathroom remodels ranging from $50,856 to $58,485 depending on square footage and finishes. Design costs are quoted separately at approximately $1,700.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Castle Building & Remodeling is a residential design-build remodeling firm serving homeowners in Minneapolis and St. Paul. The company delivers kitchens, bathrooms, basements, whole house renovations, additions, attics, porches, decks, and exterior upgrades through an integrated model with in-house architects, designers, project managers, and craftsmen. Projects follow a structured 13-stage process with guaranteed upfront pricing and completion dates, backed by a three-pronged industry-leading guarantee.

Product overview

Castle Building & Remodeling is a licensed Minnesota contractor offering comprehensive residential home remodeling services in Minneapolis and St. Paul. The company operates a unified design-build model with in-house architects, designers, project managers, and craftsmen. Core services include Kitchens, Bathrooms, Basements, Whole House Renovations, Additions & 2nd Floors, Attics, Porches & Decks, Exterior/Specialty work, and Accessory Dwelling Units (ADU). The company also operates a Special Projects Team for smaller repairs and focused improvements. A structured 13-step Design-Build Process guides all projects from initial consultation through final warranty support, with guaranteed upfront pricing and completion dates. The company specializes in older urban homes and works with local suppliers for cabinets, countertops, tiles, and appliances.

Differentiator

Problem solved

Functional benefit

Products and services

• Kitchen Remodeling Design-build kitchen remodeling services including wall removal for open-concept layouts, additions, and complete kitchen relocations, tailored to Minneapolis and St. Paul homeowners across various architectural styles.
• Bathroom Remodeling Full-spectrum bathroom remodeling from powder rooms to master suites, including gut-to-studs renovations, half-bath additions, and luxury owner's suites with steam showers and heated floors, for Twin Cities homeowners.
• Basement Remodeling Basement finishing and remodeling services that transform unfinished spaces into climate-controlled family rooms, workout areas, guest bedrooms, and additional bathrooms for Minneapolis-St. Paul homeowners.
• Whole House Renovations Comprehensive whole home renovation services with structural engineering support for beam sizing and load calculations, often phased to allow clients to remain in portions of the home during construction.
• Additions and Second Floors Home additions including second-story additions, first-floor expansions, mudrooms, three-season porches, and owner's suites, with handling of zoning, plan review, and building codes.
• Attic Conversions Attic conversion services transforming underused attic spaces into bright, functional living areas such as bedrooms, home offices, or guest suites.

Named customers5 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Twelve partnerships are on record, tiered core and minor.

• Sauk Centre, MN Cabinet SupplierscoreOthersCabinets are sourced locally from Sauk Centre, Minnesota, supporting local manufacturing and reducing lead times for cabinet delivery.
• Cambria and Dakota SurfacescoreOthersGlass countertops come from LeSeur, Minnesota. Cambria quartz and Dakota Surfaces provide countertop materials through local partnerships.
• Warners' StelliancoreOthersAppliance partnership with Warners' Stellian, a local appliance retailer in the Twin Cities area.
• Clay SquaredcoreOthersHandmade tiles sourced from Clay Squared, a NE Minneapolis artisan tile maker, supporting local artists and unique custom tile work.
• Marvin WindowsminorOthersMarvin windows are used for whole house renovation projects, representing a quality exterior materials partnership.
• Crystal CabinetsminorOthersCrystal Cabinets are used for whole house renovation projects as a cabinetry solution.
• KOHLERminorOthersKOHLER plumbing fixtures are used in bathroom and whole house renovation projects.
• ADURA (Mannington)minorOthersADURA flooring products from Mannington are used in basement remodeling projects.
• GAF RoofingminorOthersGAF roofing materials are used for addition projects.
• Smart Side (Louisiana Pacific)minorOthersSmart Side engineered wood siding products are used for addition and exterior projects.
• Cambria CountertopsminorOthersCambria quartz countertops are featured in kitchen remodeling projects.
• Mercury MosaicsminorOthersMercury Mosaics creates custom tile backsplashes for kitchen remodeling projects.

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Sawhorse Designers & Builders: Minneapolis design-build remodeling firm offering integrated design and construction services for residential renovations. A current Castle Project Developer (John Rothbauer) previously worked at Sawhorse, indicating direct overlap in service model, customer base, and Twin Cities older-home specialty.
• John Kraemer & Sons: Long-established Minneapolis luxury residential remodeling and custom home builder. Comparable to Castle in delivering design-build remodeling for higher-end Twin Cities homeowners, with similar emphasis on craftsmanship, project management, and whole-home renovations.
• Boyer Building Corporation: Minneapolis-based residential design-build firm focused on home additions, remodels, and custom homes in the Twin Cities. Directly comparable to Castle in service mix, design-build delivery model, and target customer profile of older-home owners in established neighborhoods.
• Hartman Homes: Twin Cities design-build remodeling and custom home builder with a long local history. Overlaps with Castle on whole-home renovations, additions, and kitchen/bath projects for established Twin Cities residential clients.
• Sustainable 9 Design + Build: Minneapolis design-build remodeling firm emphasizing sustainable and high-performance renovations. Comparable to Castle on integrated design-build delivery, older-home renovation focus, and Twin Cities service area, with a distinct positioning around sustainability.

Regional players

• Murphy Brothers Contracting: St. Paul-based residential remodeling and home building company serving the Twin Cities. Comparable to Castle in service offerings (kitchens, baths, additions, whole-home) and customer segment, operating as another established local design-build competitor.
• CRD Design Build: Seattle-area design-build remodeling company with a defined process, in-house design, and project management teams. Comparable to Castle in integrated design-build approach and remodeling focus, though serving the Pacific Northwest rather than the Midwest.
• Marrokal Design & Remodeling: San Diego-based residential design-build remodeling firm with an in-house design team, structured process, and guaranteed pricing. Comparable to Castle on business model and customer experience design, though operating in a different regional market.

Broad incumbents

• RJM Construction: Larger Minnesota-based general contractor with a residential remodeling practice alongside commercial construction. Comparable to Castle on residential renovation delivery but operates at significantly greater scale and with a broader project portfolio.
• BOWA Builders: Mid-Atlantic luxury design-build remodeling firm with a structured process, senior design staff, and guaranteed pricing model. Comparable to Castle in design-build methodology and process-driven customer experience, though operating in a different geography.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/CastleBuildingRemodeling

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Castle Building & Remodeling