Quick Comparison
| Firm | Credentials | Focus |
|---|---|---|
| NorthStar Bookkeeping | Certified QuickBooks ProAdvisor (Advanced Online); FreshBooks Certified ProAdvisor; founders with 20-plus years of experience | South Orange County construction, property management, law firms, and CEO/CFO clients needing remote full-cycle bookkeeping plus Chapter 11 work |
| BrittByDesign | Certified QuickBooks ProAdvisor; Xero Specialist; certified payroll handler | Irvine and coastal Orange County boutique clients in interior design, real estate, architecture, construction, legal, entertainment, and retail |
| The Orange County Bookkeeper | Certified QuickBooks ProAdvisor; MBA on founder; member of San Clemente Chamber of Commerce | South Orange County solopreneurs, growing businesses, and high-net-worth individuals needing personalized monthly bookkeeping and net-worth tracking |
1. NorthStar Bookkeeping
- Address: 18001 Irvine Boulevard, Suite 205, Tustin, CA 92780
- Phone: (714) 608-1526
- Founder / Owner: Heather Kirstein and Paul Yee (co-owners)
- Operating Since: 2014 (12 years under the present brand and partnership)
- Credentials: Certified QuickBooks ProAdvisor (Advanced Online and core ProAdvisor); FreshBooks Certified ProAdvisor; co-owner Heather Kirstein listed in the Intuit ProAdvisor directory with more than 20 years of accounting experience
- Service area: Tustin, Irvine, and the broader South Orange County corridor, with remote engagements running nationwide
- Industries served: Construction firms, property management and real estate, law firms, plus general businesses serving CEOs, CFOs, and outside CPAs
- Website: northstar-bookkeeping.com
Two-owner partnership anchored on Irvine Boulevard
Heather Kirstein and Paul Yee co-own NorthStar Bookkeeping and run the firm from a Suite 205 office on Irvine Boulevard in Tustin, a few minutes from the Irvine border. The two-principal structure means engagements stay with named owners rather than rotating through pool staff, which matters for clients moving multi-year construction job costs or property management portfolios into a clean QuickBooks file. Heather holds the Advanced QuickBooks ProAdvisor designation, the higher tier above the standard certification, and the company’s Tustin address sits in the Intuit ProAdvisor directory under her name for second-source verification.
Construction and property management focus with billings-in-excess detail
The firm publishes industry pages for construction and property management, two niches that generalist bookkeepers tend to flatten into a basic chart of accounts. NorthStar covers job costing, progress billing, billings in excess of costs, and retention tracking on the construction side, and it handles trust accounting structures and tenant ledgers on the property management side. The firm’s blog includes a dedicated explainer on billings in excess of costs for construction companies, which signals working familiarity with WIP schedules that lenders and bonding agents review at year-end.
Law firm bookkeeping with IOLTA discipline
A separate practice page covers law firm bookkeeping and IOLTA trust account handling, the second area where Orange County legal practices most often fail compliance review. NorthStar maps three-way reconciliations, matter-level cost tracking, and client trust ledger integrity into the monthly delivery cadence, which keeps California State Bar rules in alignment with QuickBooks transaction history. The firm pairs that legal scope with general business bookkeeping so a multi-entity owner with a law practice plus a side investment LLC can keep both sets of books under one engagement.
Chapter 11 bankruptcy reporting as a defined service line
NorthStar publishes Chapter 11 bankruptcy bookkeeping as an explicit service, which is unusual for an independent shop. Monthly operating reports, trustee filings, and debtor-in-possession reporting require specific schedules that diverge from standard small-business deliverables, and the shop maintains the templates and process knowledge to run those reports without referring the work out. South Orange County clients in distressed-asset workouts, restructuring counsel relationships, or trustee-led wind-downs can engage NorthStar directly rather than stitching together a turnaround consultant and a separate bookkeeper.
2. BrittByDesign
- Address: 17595 Harvard Avenue, Suite C123, Irvine, CA 92614
- Phone: (424) 258-4073
- Founder / Owner: Brittany (publicly listed as Brittany B. on Yelp and the practice’s marketing channels)
- Operating Since: 20-plus years of bookkeeping practice under the founder, with the BrittByDesign brand serving Orange County clients for more than a decade
- Credentials: Certified QuickBooks ProAdvisor across PC, Mac, and Online editions; Xero Specialist; certified payroll and prevailing wage handler
- Service area: Irvine, Aliso Viejo, Corona Del Mar, Costa Mesa, Fountain Valley, Huntington Beach, Laguna Beach, Laguna Woods, Lake Forest, Los Alamitos, Mission Viejo, Newport Beach, Santa Ana, and Tustin
- Industries served: Real estate, interior design, architecture, construction, legal services, entertainment, nightlife, and retail
- Website: brittbydesign.com
Boutique focus on creative and lifestyle industries
BrittByDesign anchors on a sector mix that few Orange County bookkeepers publish openly: interior design firms, architecture studios, entertainment companies, and nightlife operators. Each of those verticals carries unique chart-of-accounts patterns, from cost-of-goods tracking on designer-supplied product to deposit accounting on long-cycle architecture engagements and merchant settlements on nightlife venues. Brittany maintains industry-specific templates, which compresses onboarding time for an Irvine boutique client whose previous bookkeeper treated their books like a standard service business.
Dual-platform fluency on QuickBooks and Xero
The firm publishes Certified QuickBooks ProAdvisor status across PC, Mac, and Online, plus Xero Specialist credentials. That dual-platform fluency matters because creative-industry clients often arrive on Xero from a prior agency relationship while construction and legal clients tend to run QuickBooks Desktop or Online. BrittByDesign accepts files in both ecosystems without forcing a migration, and when a migration is the right move the firm runs the conversion in-house rather than referring out. Most independent bookkeepers in Orange County hold one credential, not both.
Prevailing wage and certified payroll for trades clients
Construction, painting, and trades clients running California public works contracts must file certified payroll under prevailing wage rules, a reporting layer that catches generalist bookkeepers off guard. BrittByDesign explicitly handles prevailing wage and certified payroll, including W-2 issuance, payroll tax calculations, and quarterly filings. Irvine general contractors bidding on city, county, or state projects can route certified payroll through the company rather than maintaining a separate compliance vendor on top of monthly bookkeeping.
Harvard Avenue office inside a 92614 business park
The Suite C123 office on Harvard Avenue places BrittByDesign inside the central Irvine business corridor, walking distance from many of the shop’s named industries. Most engagements run remotely through QuickBooks Online, Xero, and secure document portals, but the in-person option is available for clients who prefer quarterly closing reviews on-site. The 92614 ZIP code also means the practice sits closer to most Irvine clients than the Tustin and San Clemente alternatives in this directory, useful when an owner wants to drop off backup boxes or pick up year-end packages in person.
3. The Orange County Bookkeeper
- Address: San Clemente, CA 92672
- Phone: (714) 851-2151
- Founder / Owner: Andrew Steedman, MBA
- Operating Since: May 2018 under the current LLC, with prior freelance bookkeeping experience the founder built during his Chapman University undergraduate years and afterward
- Credentials: Certified QuickBooks ProAdvisor (listed in the Intuit ProAdvisor directory); MBA in Business Administration; BA in Economics and Business from Chapman University
- Service area: South Orange County including San Clemente, San Juan Capistrano, Dana Point, Mission Viejo, Laguna Niguel, Lake Forest, Irvine, and surrounding cities
- Industries served: Solopreneurs, growing small to mid-sized businesses, and high-net-worth individuals managing personal plus business books, including commercial real estate owners and tech startup founders
- Website: theocbookkeeper.com
Founder profile rooted in Chapman entrepreneurship
Andrew Steedman started bookkeeping for startups and high-net-worth individuals while still an undergraduate at Chapman University, then formalized the practice as The Orange County Bookkeeper LLC in May 2018. He co-founded a tech company during the same period, managed personal and business finances for multiple C-level executives, and oversaw the management of a 285-resident neighborhood association. That mix gives a single principal direct exposure to investor-tracked startups, executive personal financial management, and HOA-style entity accounting, three patterns most independent bookkeepers see only one of.
Personalized engagement model rather than packaged tiers
The firm’s public positioning leans into personalized bookkeeping for solopreneurs, growing businesses, and high-net-worth individuals, rather than pushing prospective clients into pre-priced tiers. Andrew handles intake conversations directly, scopes the engagement against the actual file state, and keeps engagement counts at a level where each client interacts with the principal rather than a junior associate. South Orange County owners who left a national platform because they got pool-staff churn can use the single-principal structure as a deliberate counterweight.
Net-worth and personal financial bookkeeping beyond standard small-business books
A defined service line covers personal and family financial bookkeeping for high-net-worth individuals, including tracking investment accounts, real estate holdings, and entity-level cash flows that flow back to the owner. That scope sits next to standard small-business deliverables, so a Lake Forest founder running an operating LLC plus a personal investment portfolio can consolidate both inside one bookkeeper rather than juggling a separate family-office vendor. The Intuit ProAdvisor directory entry verifies the QuickBooks credential under Andrew Steedman’s name in San Clemente.
San Clemente base with Irvine-and-north reach
The San Clemente operating address places the firm in the southern reach of Orange County, with the I-5 corridor connecting clients in Irvine, Lake Forest, Mission Viejo, and Laguna Niguel within a 25-minute drive window. Cloud-based delivery through QuickBooks Online and secure portals is the default, so geography rarely constrains the engagement. The San Clemente Chamber of Commerce member listing provides an additional verification touchpoint outside the company’s own marketing channels.
Reference Notes
Firm details cross-reference each firm’s public website with secondary sources. NorthStar Bookkeeping data triangulates the shop’s About, Contact, and industry pages against the Intuit ProAdvisor directory entry for Heather Kirstein, the LinkedIn profile listing her as co-owner, and Alignable’s Irvine local business profile. BrittByDesign data combines the practice’s site and Services page with the Yelp listing under owner Brittany B., the Facebook business page, and the Yahoo Local Search profile carrying the Harvard Avenue address. The Orange County Bookkeeper data merges the firm’s site with the Intuit ProAdvisor directory entry for Andrew Steedman, the LinkedIn principal profile listing him as MBA-holding owner, the BizProfile filing record for the LLC, and the San Clemente Chamber of Commerce member directory.
Year-of-establishment values reflect the earliest publicly documented year of operation under the present ownership and brand name. Where a founder’s personal practice predates the current entity, the directory uses the entity formation year as the anchor and notes the longer informal history in the body copy. Phone numbers, addresses, and credentials reflect the most recent published information at the time of compilation, and readers should confirm any of these details directly with each firm before engaging services.
The directory deliberately excludes firms covered in the Anaheim, Santa Ana, Los Angeles, and Long Beach editions to avoid duplication across nearby markets. QBcure and The Borden Group, while both publishing Irvine in their service areas, sit in those neighboring city editions and are not repeated here.
Selection Methodology
Four criteria filter the Irvine and South Orange County list down to three firms. First, the company must be independent, family-owned, or founder-led under the original principal who still works the books, which excludes private-equity rollups and nationally managed franchises. Second, the shop must hold or staff the Intuit Certified QuickBooks ProAdvisor designation, the baseline platform credential for modern small-business bookkeeping. Third, the practice must show at least a five-year track record under its current name and ownership, documented through directory profiles, secretary of state filings, or independent listings. Fourth, the firm must offer bookkeeping as a primary service line rather than positioning it as an afterthought to a pure CPA tax practice.
Several national operators were excluded by design, including Bench, Pilot, QuickBooks Live, BELAY, Bookkeeper360, Bookminders, Supporting Strategies, Bookkeeper.com, and 1-800Accountant. These platforms do not meet the independent local ownership test that anchors the directory. Pure CPA-tax practices in Irvine and South Orange County were also excluded, even when they hold QuickBooks ProAdvisor status, because their primary delivery model is tax preparation rather than recurring bookkeeping. Firms already covered in the Anaheim, Santa Ana, Los Angeles, and Long Beach editions of this directory series were also excluded to keep each city list distinct.
Frequently Asked Questions
Q: How do I verify an Irvine bookkeeper’s credentials?
A: The Intuit ProAdvisor directory accepts a name or location search and returns the practitioner’s certification level, including standard ProAdvisor and the higher Advanced ProAdvisor tier. Heather Kirstein at NorthStar carries Advanced Online; the BrittByDesign founder and Andrew Steedman at The Orange County Bookkeeper carry standard ProAdvisor status. Cross-checking the directory against the company’s own website avoids relying on marketing copy alone, and the California Secretary of State business search confirms entity status under the current name.
Q: What credentials should an Irvine bookkeeper hold?
A: At minimum a current QuickBooks ProAdvisor certification, since QuickBooks Online and Desktop dominate California small-business bookkeeping. Additional signals include AIPB or NACPB membership, a degree in accounting, prior controller-level work history, and a documented track record on construction, real estate, or law firm files when those niches apply. All three firms in this directory hold ProAdvisor status; NorthStar and BrittByDesign add a second platform credential (FreshBooks and Xero respectively); The Orange County Bookkeeper adds an MBA on the founder.
Q: How can I tell if an Irvine bookkeeper is independent versus a national rollup?
A: An independent firm publishes a single named principal or small partnership, lists a local Orange County address, and shows California Secretary of State filings under the same brand for at least five years. National rollups present uniform website templates, generic founder language, regional phone numbers routed to call centers, and pricing pages that read like SaaS subscriptions. The three firms here all show local owners, locally registered entities, and direct phone routing to the principal or a small team.
Q: When should an Irvine business hire a bookkeeper versus a CPA?
A: Bookkeepers handle the recurring monthly work of recording transactions, reconciling bank and credit card accounts, processing payroll, generating financial statements, and preparing files for year-end. CPAs handle tax planning, return preparation, audit and assurance, and IRS representation, which require specific licensure that bookkeepers do not hold. The standard pattern in Irvine is to engage one of the three firms here for monthly bookkeeping, then deliver a clean trial balance and supporting schedules to the client’s chosen CPA at year-end. Splitting the work this way keeps each professional inside their licensed lane.
Editorial Note
This directory was compiled on May 11, 2026, from publicly available firm websites, the Intuit ProAdvisor directory, the California Secretary of State business filing records, LinkedIn principal profiles, Yelp and Yahoo Local Search business listings, the San Clemente Chamber of Commerce member directory, BizProfile filing records, and Alignable local business profiles. Listed phone numbers, addresses, and credentials reflect the most recent published information as of that date. Readers should verify current details with each firm directly before engaging services.