What Appraisal Development International does

Appraisal Development International, Inc. (ADI) is a privately held commercial and residential real estate appraisal firm headquartered in Tampa, Florida, operating under family ownership and control by CEO Paul Willies since 2003. Founded in 1979 in Safety Harbor by Mark Willies and Thomas Cashion, the company provides USPAP-compliant narrative appraisal reports for commercial properties (acreage, farms, medical/office leasehold estates, industrial, restaurants, multi-family, hotels/motels, historic properties, churches, and special purpose properties) and state-certified residential appraisals (single-family, condominiums, and up to four-unit multi-family) across Hillsborough, Pinellas, Pasco, and Manatee Counties, with commercial work performed statewide across Florida. The April 2020 acquisition of Appraisal Alliance Inc. brought five residential appraisers and an administrator into the firm under the ADI banner, expanding service breadth.

The business operates on a per-assignment professional services model with residential fees typically ranging $450-$550 and commercial fees ranging $1,000-$10,000 for smaller commercial and industrial properties of 2,000 to 50,000 sq. ft. Ancillary offerings include business value appraisals and machinery & equipment valuations delivered through a partnership with Business Value Center, Inc. ADI distributes services through multiple channels: a website-based online quote system for direct ordering, approved-appraiser panel relationships with ten or more financial institutions, attorney and court referrals (including expert witness work for two Florida Circuit Courts and the U.S. Bankruptcy Court Middle District of Florida), realtor partnerships, and government entity approvals (City of St. Petersburg and Tampa Housing Authority). The technology stack is light: a suite of free online financial calculators (mortgage, refinance, debt consolidation, conversion chart, standard deviation) supports top-of-funnel client engagement rather than functioning as a core platform.

The company markets through its website, Facebook, Twitter (@ADI_Tampa), and LinkedIn (Paul Willies), and maintains a Platinum sponsorship with the CCIM Institute West Coast District along with board membership in the AREAA Greater Tampa Bay Chapter and key sponsorship of the Bridge to Knowledge Brainery commercial real estate training course. ADI has no disclosed external funding, no parent company, and operates with a team of approximately 6-10 appraisers and administrative staff.

Name

Appraisal Development International

Legal name

Appraisal Development International, Inc.

Website

https://appraisaldevelopment.com

Company type

Private

Founded year

1979

Operating status

Operating

Headcount range

1–10 employees

Short description

Appraisal Development International is a privately held Tampa, Florida-based real estate appraisal firm providing USPAP-compliant commercial narrative reports and state-certified residential appraisals across Hillsborough, Pinellas, Pasco, and Manatee Counties, serving lenders, courts, attorneys, and government entities since 1979.

Ownership category

akta.pro rank

Product category

Real Estate Appraisal Services

NAICS

Offices of Real Estate Appraisers (53132), Offices of Real Estate Appraisers (531320)

SIC

Real Estate Agents & Managers (For Others) (6531)

akta.pro primary industry

Real Estate Valuation & Appraisal (commercial/residential) (FSAEAHAJ)

akta.pro secondary industries

Commercial Property Appraisal (BPAJAKAB), Residential Property Appraisal (BPAJAKAA), Multi-Family & Affordable Housing Appraisal (BPAJAKAE), Machinery, Equipment & Fixed Asset Appraisal (FSAEAHAK)

Keywords

• Real estate appraisals
• Commercial property valuation
• Residential property appraisals
• USPAP compliant appraisals
• Tampa Bay appraisers

Headquarters

HQ city

Tampa

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Appraisal Services: ADI provides commercial and residential real estate appraisals billed on a per-assignment basis. Commercial appraisals range from $1,000 to $10,000 for smaller commercial and industrial properties (2,000 to 50,000 sq. ft.). Residential appraisal fees typically fall between $450 and $550. The company also offers machinery & equipment valuations and business value appraisals in partnership with Business Value Center.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels5 records

Core offering

Appraisal Development International provides USPAP-compliant commercial and residential real estate appraisal services across Florida, including narrative commercial reports for offices, industrial, multi-family, hospitality, and special-purpose properties, and state-certified residential appraisals for single-family, condominium, and 2–4 unit properties. Supplementary offerings include business value appraisals (via partnership with Business Value Center, Inc.), machinery and equipment valuations, and expert witness testimony in court proceedings, with orders placed through an online quote-request system and billed on a per-assignment basis.

Product overview

Appraisal Development International (ADI) is a commercial and residential real estate appraisal company based in Tampa Bay, Florida, serving Hillsborough, Pinellas, and Pasco Counties since 1979. The company offers a unified service portfolio centered on real estate valuation. Core offerings include Commercial Real Estate Appraisals (narrative reports for various property types) and Residential Appraisals, which constitute the primary revenue-generating services. These are complemented by ancillary appraisal services for business valuations and machinery/equipment. The company also provides a suite of free online financial calculators (mortgage, refinance, debt consolidator) and conversion/statistical tools as client-facing utilities. Following the April 2020 merger with Appraisal Alliance, ADI expanded to include residential appraisal services under the same banner. The business operates primarily through traditional client engagement methods (web forms, phone, email) rather than a technology platform.

Differentiator

Problem solved

Functional benefit

Brands

• Appraisal Alliance Inc. Residential appraisal company acquired by ADI in April 2020, now operating as part of the combined ADI group

Products and services

• Commercial Real Estate Appraisals Narrative appraisal reports for commercial properties across Florida, including acreage, farms, medical/office leasehold estates, industrial properties, restaurants, multi-family buildings, hotels/motels, historic properties, churches, and special-purpose properties. Targeted at lenders, attorneys, owners, buyers, and government entities requiring USPAP-compliant commercial valuations, with fees individually quoted typically from $1,000 to $10,000 for properties of 2,000–50,000 sq. ft.
• Residential Appraisals State-certified residential appraisals for single-family homes, condominiums, and multi-family properties up to four units in Hillsborough, Pinellas, Pasco, and Manatee counties. Used by homeowners, buyers, sellers, lenders, and attorneys for mortgage origination, refinance, PMI removal, estate planning, divorce, and tax appeal purposes, with typical fees of $450–$550.
• Business Value Appraisals Full business appraisals delivered in partnership with Business Value Center, Inc. for entrepreneurs, business owners, and intermediaries needing professional representation for business transactions and deal structuring.
• Machinery & Equipment Appraisals Independent valuation of furniture, fixtures, machinery, and equipment contents of buildings beyond the underlying real estate, supporting lenders, attorneys, and business owners in financing, insurance, and litigation matters.
• Expert Witness Appraisal Services Court-qualified appraisal reports and expert witness testimony provided to the Circuit Court of the 13th Judicial Circuit (Hillsborough County), Circuit Court of the 6th Judicial Circuit (Pinellas County), and U.S. Bankruptcy Court for the Middle District of Florida, supporting divorce, estate, eminent domain, partnership dissolution, and tax appeal proceedings.

Quantifiable outcome

• $4.3+ billion in valuations performed
• +1 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Appraisal Alliance Inc.coreStrategic or Co-development PartnerEffective April 1, 2020, ADI merged with Appraisal Alliance Inc., adding five residential appraisers and an administrator to the combined team. Appraisal Alliance was founded by Mike Seward in 2000 and was named the largest residential appraisal firm on Florida's west coast by Tampa Bay Business Journal in 2003. Mike Seward remains as Senior Appraiser and Consultant.
• Business Value Center, Inc.coreStrategic or Co-development PartnerPartnership for full business appraisals. BVA provides entrepreneurs with professional representation for business transactions. At BVA, Certified and C-Level Intermediaries help with deal structuring and negotiating. Harry Haigley serves as Business Intermediary.
• CCIM InstitutecoreGTM or Marketing PartnerADI is a Platinum Sponsor for the West Coast District of the Florida CCIM Institute and key sponsor of Bridge to Knowledge Brainery, a comprehensive commercial real estate training course for commercial realtors.
• Bridge to Knowledge BraineryminorGTM or Marketing PartnerADI is a key sponsor of this comprehensive commercial real estate training course for commercial realtors, supporting professional development in the Tampa Bay market.

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Cushman & Wakefield (Valuation & Advisory): Global commercial real estate services firm with a major valuation and appraisal practice. Competes with ADI for commercial appraisal work but as part of a much broader full-service real estate platform.
• CBRE (Valuation & Appraisal Services): Largest global commercial real estate services firm, with a substantial appraisal and valuation practice serving institutional clients. Overlaps with ADI's commercial narrative report work but at significantly greater scale and geographic reach.
• JLL (Jones Lang LaSalle Valuation): Global real estate services firm with a dedicated valuation practice serving institutional and corporate clients. Competes for high-value commercial appraisal assignments but offers a much broader services portfolio.
• Colliers International (Valuation & Advisory): Global real estate services firm offering appraisal, valuation, and advisory services across property types. Comparable on commercial appraisal methodology and client base, though part of a much larger platform.
• Newmark Valuation & Advisory: Commercial real estate services firm with an active valuation and appraisal practice. Overlaps with ADI in commercial narrative reports for lenders and investors, but operates within a wider brokerage and capital markets platform.
• Altus Group: Commercial real estate advisory, analytics, and appraisal firm serving institutional investors and lenders. Comparable on commercial valuation methodology, though with significantly broader tech-enabled analytics capabilities.

Direct peers

• Integra Realty Resources: One of the largest US commercial real estate valuation and advisory firms, providing appraisal and consulting services across property types. Comparable to ADI in core commercial appraisal services and institutional client base.
• Valbridge Property Advisors: National network of independent commercial and residential appraisal firms with a similar regional-anchor model. Directly comparable as both compete on local market expertise and USPAP-compliant narrative reports for lenders and institutions.
• BBG (Butler Burgher Group): National appraisal and valuation firm providing commercial and residential real estate appraisals, plus machinery & equipment valuations. Particularly comparable to ADI on the M&E and business valuation side.

Regional players

• Real Estate Valuation Advisors (REVA): Regional-focused real estate appraisal firm serving lender and institutional clients with USPAP-compliant reports. Comparable business model and client mix to ADI's regional lender-focused residential and commercial work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/ADI_Tampa
• Facebookfacebook.com/pages/Appraisal-Development-International/136542646381774
• LinkedInlinkedin.com/in/paulwillies

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries1 record

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 Appraisal Development International