# Brian Perry Advisory > Commercial real estate tenant and buyer representation for healthcare practices and office tenants in Tysons Corner, Northern Virginia, Washington DC and Maryland. Brian Perry, CCIM, represents tenants and buyers only, never landlords. This site publishes original market research on Northern Virginia office and medical office leasing, with sources cited. Every page below is plain Markdown. The HTML version of each lives at the same path without the .md suffix. All content is free to read, quote and cite with attribution to Brian Perry Advisory. ## Services - [Healthcare Tenant Representation](https://brianperryadvisory.com/services/healthcare-tenant-representation.md): Medical, dental, behavioural health and ambulatory practices leasing or buying in Tysons Corner and Northern Virginia. - [Office Tenant Representation](https://brianperryadvisory.com/services/office-tenant-representation.md): Office tenants in Tysons Corner and Northern Virginia, in new leases, relocations, expansions and renewals. - [Lease Renewals & Relocations](https://brianperryadvisory.com/services/lease-renewals-relocations.md): Stay, renegotiate or move. The analysis behind the decision, on a Tysons lease or anywhere in the region. - [Buyer Representation](https://brianperryadvisory.com/services/buyer-representation.md): Practices and businesses purchasing commercial property for their own occupancy. - [Multiple Location Requirements](https://brianperryadvisory.com/services/multiple-location-requirements.md): Groups expanding across several markets, with one point of contact and local expertise in each. ## Market - [Tysons Corner submarket guide](https://brianperryadvisory.com/tysons-corner.md): What tenants should know about the Tysons Corner office and medical market: inventory, vacancy, asking rents and how Tysons compares to Reston and Arlington. ## Insights - [Five Brokerages, Five Different Vacancy Rates: What the Northern Virginia Office Reports Are Not Telling You](https://brianperryadvisory.com/insights/northern-virginia-office-vacancy-reports-disagree.md): 7 August 2026. Five firms published five different vacancy numbers for the same quarter. The spread is methodology, not disagreement, and neither one helps you at the table. - [If Your Northern Virginia Office Lease Expires in 2027 or 2028, You Are Probably Already Late](https://brianperryadvisory.com/insights/nova-office-lease-expiring-2027-2028.md): 31 July 2026. Published leasing timelines run six to twenty four months. The leverage window closes about a year before the lease does. - [Understanding the Office Leasing Landscape in 2026](https://brianperryadvisory.com/insights/fairfax-and-arlington-are-two-markets-in-one-right-now.md): 26 July 2026. General office favours tenants. Medical favours landlords. Fairfax and Arlington are running both conditions at once. - [Medical & Dental Office Space in Tysons-McLean, VA](https://brianperryadvisory.com/insights/medical-dental-office-space-tysons-mclean-va.md): 19 July 2026. More than 220 healthcare and dental locations sit in one corridor. Here is who is already there and what the space costs. - [Owner-User vs. Investment Sales: What Fairfax County's Retail Market Is Telling Us](https://brianperryadvisory.com/insights/owner-user-vs-investment-sales-fairfax-county-retail.md): 13 July 2026. Fifty three investment sales against eleven owner-user purchases in twelve months. Two buyers, two pricing models, two different deals. - [Same Market, Three Different Negotiations: What Retail, Office, and Medical Tenants in Northern Virginia Should Actually Watch in H2 2026](https://brianperryadvisory.com/insights/same-market-three-different-negotiations.md): 6 July 2026. One region, one quarter, three different sets of tenant leverage. An office playbook applied to a medical requirement will cost you. - [Everyone Says Dental Is Saturated in Northern Virginia. They're Looking at the Wrong Problem.](https://brianperryadvisory.com/insights/everyone-says-dental-is-saturated-in-northern-virginia-they-re-looking-at-the-wrong-problem.md): 1 July 2026. Tysons retail vacancy is 2.2 percent. That is a supply problem, not a demand problem, and the two get confused constantly. - [What Most Dental and Medical Tenants Get Wrong Before Signing a Lease](https://brianperryadvisory.com/insights/what-most-dental-and-medical-tenants-get-wrong-before-signing-a-lease.md): 16 June 2026. The expensive mistakes do not happen at renewal. They happen at signing, while everyone is looking at the first year rent. - [You Sold Your Practice to Private Equity. Should You Sell the Real Estate Too?](https://brianperryadvisory.com/insights/you-sold-your-practice-to-private-equity-should-you-sell-the-real-estate-too.md): 27 May 2026. Sell now, extend then sell, or hold. Three paths for a medical condo with a PE backed tenant, and the risk hiding in the assignment clause. - [Northern Virginia Office Tenants Have More Leverage Than They Realize Right Now](https://brianperryadvisory.com/insights/northern-virginia-office-tenants-have-more-leverage-than-they-realize-right-now.md): 24 May 2026. Asking rents hit records while net effective rents went the other way. The spread between them is the whole negotiation. - [The Washington DC Commercial Real Estate Outlook 2026: A Strategic Guide for Tenants and Buyers](https://brianperryadvisory.com/insights/the-washington-dc-commercial-real-estate-outlook-2026-a-strategic-guide-for-tenants-and-buyers.md): 17 March 2026. Policy access, the most educated workforce in the country, and a government anchored economy. Where DC tenants and buyers should be looking. - [Understanding Tenant Improvements in Washington DC: A Comprehensive Guide](https://brianperryadvisory.com/insights/understanding-tenant-improvements-in-washington-dc-a-comprehensive-guide.md): 10 March 2026. How TI allowances actually work in DC, what historic buildings do to a schedule, and the lease terms that decide who pays for the overrun. ## About - [Brian Perry, CCIM](https://brianperryadvisory.com/about.md): Background, credential and coverage area. - [Contact](https://brianperryadvisory.com/contact.md): Phone, email, office and how a first call works. ## Optional - [Full site as one file](https://brianperryadvisory.com/llms-full.txt): every page above concatenated. - [Sitemap](https://brianperryadvisory.com/sitemap.xml): all indexable URLs.